【文档说明】第二章船舶辅助机械.pptx，共(214)页，705.146 KB，由精品优选上传

转载请保留链接：https://www.ichengzhen.cn/view-260680.html

以下为本文档部分文字说明：

第二章船舶辅助机械1090Avanepumpbelongsto_______accordingtoitsworkingprinciple.根据工作原理，叶片泵属于容积式泵。A.reciprocatingpumpB.positivedisplacement

pumpC.centrifugalpumpD.centripetalpump1091Througha_______pump,theliquidistransferredfromthesuctiontothe1092dischargebythemechanica

lvariationofthevolumeofachamberorchambers.对于容积式泵，液体通过泵腔室体积的改变从吸入口排至排出口。A.positivedisplacementB.ejectorC.centrifugalD.aircompressor1092Amono-pumpi

sasingle-screwpump.Thatmeansitconsistsof_______rotor(s).单螺杆泵只有一个转子。A.oneB.twoC.threeD.four1093Thegearands

crewpumpsareclassifiedas____齿轮泵和螺杆泵都属于容积式泵。A.variablestrokepumpsB.multistagepumpsC.positivedisplacementpumpsD

.triple-portedpumps1094Gearpumpsareofpositivedisplacementtypepumpsbecausetheydischargeanearconstantamountofliquid_______pressure.不管压力如何，齿轮泵的排

量几乎恒定。A.dependingonB.inrelativetoC.regardlessofD.becauseof1090B1091A1092A1093C1094C1095Agearpumpbelongsto_______accordingtoitsworkingprinciple.根据工作

原理，齿轮泵属于容积式泵。A.reciprocatingpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalpumps1096Thepressur

eheadofapumpisgivenintheunitof_______泵的压头常用“米液柱”高度表示。A.kgB.MPaC.meterfluidcolunmD.Noneoftheaboveistrue.1097A

centrifugalpumpproducestherequiredpressureenergybymeansofarotating_______providedwithvanes.离心泵通过旋转带有叶片的叶轮来产生压力能。A.propellerB.impellerC.cir

cumferenceD.screw1098Thedischargeflowofareciprocatingpumpis____往复泵的排量具有脉冲性。A.steadyB.inpulsationC.conti

nuousD.large1099Ina_______thecenterscrewisdrivenandtheouterscrewsidle.A.singlescrewpumpB.double-screwpump在三螺杆泵中，只有中间螺杆被驱动。

C.triplescrewpumpD.centripetalpump1100AScrewpumpbelongsto_______accordingtoitsworkingprinciple.1101根据工作原理，螺杆泵属于容积式泵。

A.reciprocatingpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalpumps1095B1096C1097B1098B1099C1100B1101Theamountoffl

uiddeliveredbyascrewpumpcanberegulatedby_______齿轮泵属于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.changingthespeedoftherotorC.eitherAorBD.

Noneoftheaboveistrue.1102Whileflowingthroughthevoluteinacentrifugalpump,partofthe_______energyoftheliquidi

sconvertedto_______energy.当液体经过离心泵的涡壳时，部分动能转换成压力能。A.kinetic/pressureB.kinetic/essentialC.pressure/kineticD.pressure/height1103Theamount

offluiddeliveredbyacentrifugalpumpcanberegulatedby_______离心泵的排队量可通过改变压力来调节，出可通过改变转子的速度调节。A.throttlingt

hepressurelineB.changingthespeedoftherotorC.eitherAorBD.Noneoftheaboveistrue.1104Theamountoffluiddeliveredbyareciprocating

pumpcanberegulatedby______1105往复泵属于容积式泵，排量通过改变柱塞的速度来调节。A.throttlingthepressurelineB.changingthespeedofthepistonC.eitherAorBD.Noneoftheaboveistree.11

05Theamountoffluiddeliveredbyapositivedisplacementpumpcanberegulatedby_____对于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.changingthespeedofth

edrivingrotorC.eitherAorBD.Noneoftheaboveistrue.1101B1102A1103C1104B1105B1106WhichofthefollowingpumpsareseE-priming,andcan

dealwithhquidfromalevelbelowthepump?①reciprocating;②rotary;③centrifugal.往复泵和旋涡泵都具有干吸能力，而离心泵没有。A.①onlyB.

①and②C.①②and③D.②and③1107Theamountoffluiddeliveredbyahelicalpumpcanberegulatedby_______螺旋泵属于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.chan

gingthespeedoftherotorC.eitherAorBD.Noneoftheaboveistrue.1108Apositivedisplacementpumpisthatwherethevolumeofthepumpchamberisalternatel

yincreasedto_______andthendecreasedto对于容积式泵，泵腔室体积增大时吸人液体，体积减少时则排出液体。A.drawtheliquidin/forcetheliquidoutB.forcetheliquidout/drawtheli

quidinC.suction/drawD.deliver/outlet1109Throttlinginthe______lineofacentrifugalpumpinvolvestheriskofthepump11

10cavitation.对于离心式泵，节流吸人管路，会产生气蚀危险。1111A.suctionB.exhaustC.pressureD.discharge1110Asforahydraulicsingleactionvanepump,theinnerwall

ofthestatorisusuallyof______shape.对于液压单作用叶片泵，静子的内壁通常是圆形。A.circularB.ellipticalC.rectangularD.hexagon1106B1107B1108A1109A1110Al111Asforahydraulicvanep

ump,whichofthefollowingisincontactwiththevanesduringworking:①therotor;②thepumpshaft;③theexternalsurfaceofthehousing.对于液压

叶片泵，工作时，转子与叶片接触。A.①onlyB.②onlyC.①and②D.①②and③ll12Shaftsealinginacentrifugalpumpcanbeeffectedby______

_离心泵的轴封可用机械密封，也可用填料箱。A.themechanicalsealB.packedstuffingboxesC.eitherAorBD.neitherAnorBl113Areciprocatingpumpbelongsto_______accordingtoi

tsworkingprinciple.根据工作原理，往复泵属于容积式泵。A.injectorpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalp

umps1114A_______pumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedtodrawtheliquidinandthende

creasedtoforcetheliquidout.对于容积式泵，泵腔室体积增大时吸人液体，体积减少时则排出液体。A.injectorB.positivedisplacementC.centrifugalD.centripetal1115Whatisthepurposeofarel

iefvalve?释放阀可用来当排出阀关闭时将液体回流到吸人侧。A.tofill2tanksatthesametimeB.tousepumpatahigherpressureC.toreturnliquidtosuctionsideifdischargevalveisclosedD.Al

loftheabovearetrue.1111A1112C1113B1114B1115C1116Thepumpdischargepressurewillbeconsiderablyhigherthanthepressureatthe_______泵的排出压力比泵进口支管的压力要高得多。A.pu

mpentrybranchB.outletpipeC.impellerD.Noneoftheaboveistree.1117Whichofthefollowingpumpsbelongstocentrifugal-pump?扩压式泵属于离心式泵。A.Pis

tonpumpB.ScrewpumpC.DiffuserpumpD.Water-ringpump1118Thevolutepumpisoneinwhichtheimpeller____对于旋涡泵，叶轮将液体排

至渐渐变宽的流道。A.dischargesintoagraduallywideningchannelB.hasstationarydiffuservanesC.producesnokineticenergyD.Alloftheabovearetrue.1119In_______pumpsac

loseddischargevalvewillcauseburstingdischargepressure.1120柱塞泵是容积式泵，排出阀关闭将会产生具有破坏性的压力。1121A.centrifugalB.plungerC.i

njectorD.water11221120Whichofthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump;①ejector;②screw;③c

entrifugal.1123喷射泵和螺杆泵都具有干吸能力，而离心泵没有。1124A.①onlyB.①②and③C.①and③D.①②and③11251116A1117C1118A1119B.1120B1121Theamountoffluiddeliveredbya

gearpumpcanberegulatedby_______齿轮泵属于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.changingthespeedoftherotorC.eitherAorBD.Noneofthea

boveistrue1122Attemptsaremadetoeliminateaxialthrustincentrifugalpumpby_______消除离心泵的轴向力，可使用具有平衡孔的叶轮，也可使用对称叶轮。A.providingtheimpellerw

ithbalancingholesB.theuseofsymmetricalimpellerC.neitherAnorBD.eitherAorB1123Whichofthefollowingpumpswillbuildupaburstingpressureorstalltheirmotorsif

thedischargevalvesareclosed?①gear;②.centrifugal;③.screw.齿轮泵和螺杆泵都是容积式泵，排出阀关闭’将会产生具有破坏性的压力，而离心泵不会。A.①and②B.①②and③C.①and③D.②and③11

24Whichofthefollowingoperatingfeaturesdodisplacementpumpsbeariftheyare1125workingunderno-cavitationcondition?①.outputisalmostdirectlyproporti

onaltospeed;②.theyareself-priming;③.theywilldevelopadischargedpressureequaltotheresistancetobeovercome,irrespectiveofspeed.容积式泵正

常工作时具有以下特性：排量几乎与转速成正比；具有自吸能力；不管速度如何，都能产生大小等于需克服阻力的排出压力。A.①and②B.②and③C.①and③D.①②and③1125The_______pumpdischarg

esanearlyconstantamountofliquidregardlessofpressure.不管压力如何，容积式泵的排量几乎恒定。A.mixed-flowB.axial-flowC.centrifugalD.displacement1121B1122D1

123C1124D1125D1126Whichofthefollowingpumpsisusedwherearelativelyhighpressureandsmallcapacityarerequired?往复泵一般用于高压头、小排量的场合。选项C应

是“reciprocatingpump”。A.VolutepumpB.DiffuserpumpC.RegenerativepumpD.Alloftheabove1127Somepumpsusepacking

assealinggland.Theglandshouldbe______一些泵使用填料作为密封格兰，注意要少许松一点，让液体稍微泄漏。A.slackenoughtoallowslightleakageoffluidB.slightlyclockedC.broughtuptight

soasnottoallowanyleakageD.fittedwithareliefvalve1128Airchambersareusuallyfittedtoreciprocatingpumpsinorderto______往复泵中

的空气室用来保持流量稳定。A.increasedischargepressureB.increasesuctionvacuumC.developpulsationflowD.keepasteadyrateofflow1129Thepipefrict

ionandtheresistancewill______asaresultofanincreaseintheamountoffluidflowingthroughthesystem.系统流量增加时，管路摩擦和阻力将增大。注意“ri

se”与“raise”之区别。A.reduceB.riseC.raiseD.fall1126C1127A1128D1129B1130Whichofthefollowingwillbetheadvantageofacen

trifugalpumpascomparedwithareciprocatingpump?①Itsdischargeiscontinuous;②Ithasnointernalvalves;③Uponaccidentalclosingofdischar

gevalve,excessivepressurewillnotbuildup.离心泵与往复泵相比具有以下优点：排量连续；无内部阀件；如果排出阀关闭，不会产生过高的压力。A.①②B.②③C.①②③D.②only1131Wh

ichofthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump:①reciprocating;②vane;③gear.①②③A.①on

lyB.①and②C.②③and③D.①②and③往复泵、齿轮泵和叶片泵都具有干吸能力。1132Centrifugalpumpscanbedesignedwithanumberofimpellers____

_toattainahighfinaldeliverypressure.离心泵通过几个叶轮串联，可提高其排出压头。A.inseriesB.inparallelC.eitherAorBD.Noneoftheabovei

strue1133IfanoperatingauxiliaryboilerhasawaterpHreadingof7,youshould_____如果辅助锅炉给水的pH值是7，则应使用氢氧化钠进行处理，使p

H值在10左右；A.bottomblowtheboilerB.treatthewaterwithcat~sticsodaC.treatthewaterwithchemicalscavengersD.reducethewateralkalinitytorecommendedr

eadings1130C1131D1132A1133B1134Theinternalpartoftheboiler,iffound_____,hastobechemicallywashedbyyard.锅炉内侧发现水垢，应化学清洗。A.deformedB.

rustedC.crackedD.scaled1135Theinternalpartofboilershouldbeweldedbyyardiffound_____锅炉内侧发现裂纹，应电焊修理。A.scaledB.crackedC.shapechange

dD.deformed1136Thetubeinaboilershouldbeblindediffound____锅炉管子发现泄露，应封死。A.sealedB.informedC.leakyD.deformed1137Ina_____boilerth

ewaterflowsthroughtheinsideofthetubeswhilethehotgasespassaroundtheoutside.对于水管锅炉，水在管子内流动，而高温气体在管子外流动。A.water-tubeB.fire-tubeC.e

xhaustgasD.noneoftheabove1138Ina_____boilerthehotgasesfromthefurnacepassthroughthetubeswhilethewaterisontheoutside.对于火管锅炉，高温气体在管子内流动，而水在管子外流动。A.wat

er-tubeB.fire-tubeC.exhaustgasD.Noneoftheaboveistree.1139_____aremountedinpairstoprotecttheboileragainstoverpressure.锅炉安装安全阀以

防锅炉超压。A.SafetyvalvesB.WatertubeC.SteamstopvalvesD.Blowdownvalves1140Thefurnaceofaoilfiredboilershouldbe_____beforetheoperatingbur

nerislit.锅炉点火前，应进行扫气。“purge”意“驱气”；而“clearofair“清除空气”。A.filledwithwaterB.purgedC.clearedofairD.Noneoftheaboveistrue1134D1135B.1136

C1137A1138B1139A1140B1141Whensteamisbeingraisedonaboiler,thewaterlevelwillnormally_____锅炉开始运行时，水位将随锅炉温度的提高而升高。A.

dropastheboilerwarmsupB.riseastheboilerwarmsupC.remainunchangeduntiltheboilerishotenoughD.riseandfallwithth

esteamdemand1142Thedonkeyboilermaybegivenabottomblow_____锅炉熄火后，可进行下排污。A.toraisewaterlevelB.onlywhilemakingsteamC.toremov

escumD.whenfirearesecured1143Thewaterlevelinasteamingauxiliaryboilerwillalways_____辅助锅炉的水位：降随蒸汽需求量的变化而变

化。A.risewhenthesteampressureisincreasedB.remainconstantaslongasthefeedpumpoperatesC.fallwhenthesteampressureisdecreasedD

.varyasthesteamdemandchanges1144Theboilerfeedwatercheckvalvesarelocatedonthe_____锅炉给水单向阀门位于给水管路中。A.feedpumpsuctionli

neB.hotwellC.shellofthefeedheaterD.feedlinestotheboiler1145Ifindoubtastothetreewaterlevelwhenaboilerisbeingoil-fired,youshould_____烧油锅炉运行时，对真实水位没有把

握时，应尽快熄火。A.takenomeasuresB.extinguishthefireassoonaspossibleC.feedwatertotheboilerD.opentheblowdownvalve1141B1142D1143D1144D1145

B1146Theboilerfeedpumpdischargepressureishigherthanthesteamdnnnpressureto_____A.ensurefeedwaterflowintotheboilerB.keepthestea

mdrumpressurehighC.preventwaterhammerinthefeedlineD.helpthefeedwaterflashtosteam锅炉给水泵排出压力比蒸汽筒压力要高，才能确保给水进人到锅炉。1147Safetyvalves

onaboilerventtothe_____锅炉安全阀通大气。A.fueltankB.bilgeC.atmosphereD.auxiliaryexhausthne1148Adonkeyboileris_____辅锅炉即辅助性锅炉。A.onetosup

plysteamtothemainpropulsionturbineB.anauxiliaryboilerC.AandBD.neitherAnorB1149Thesafetyvalvesshouldbetestedandadjustedwhentheboilersurve

yis_____当进行锅炉检验时，应对锅炉安全阀作试验和调整。A.completedB.carriedoutC.cleanedD.steamed1150Youshouldfrequentlycomparedram-mountedandremote-readingw

aterlevelindicators._____betweenthesehavecontributedtofailuresbecauseofoverheatingthroughshortageofwater,whenaboilerwasbeingoil-fired.锅筒旁

的水位指示器与遥控水位指示器的读数要经常进行比较，两者的偏差会成为锅炉运行故障(因缺水而过热)的原因。A.DescriptionsB.DiscrepanciesC.DifferentD.Deflections1146A11

47C1148B1149B1150B1151Impuritiesfromtheboilerwatersurfacecanberemovedthroughthe_____锅炉水面的杂质可通过上排污阀清除。A.safetyvalveB.blowdownvalveC.s

cumvalveD.feedcheckvalve1152Inmotorship,_____isoftenusedtorecoversomeoftheheatcarriedintheexhaustgasesfromthemainengine.在内燃机船上，装备废气锅炉用来回收主机废气携带的热量A.a

ndieseloilheaterB.awasteheatboilerC.afreshwatergeneratorD.alltheabove1153_____willbeusedtoblowawaythecombustionproductsfro

mthetubesurfaces.A.TheblowdownvalveB.ThescumvalveC.TheairreleasecockD.Thesoot-blower吹灰器用来吹除管子表面的燃烧产物。1154Latentheatch

angesthe_____ofwater.潜热能改变水的物理状态。A.physicalstateB.temperatureC.atmosphericpressureD.sensiblepressure1155Theamountofheatre

leasedbysteamwhenitchangestowateratthesametemperatureiscalled___在同样的温度下，蒸汽变成水时所释放的热量，称为冷凝潜热。A.latentheatofcondensa

tionB.latentheatofvaporizationC.latentheatofsaturationD.sensibleheatofcondensation1151C1152B1153D1154A1155A1156Asforanoil-fir

edboilerifatanormalsteamingconditionandwater1157goesoutofsightingaugeglassestheactionyoushouldtakeis:①secureoiltofires

;②)increasefeedpumppressure.发现锅炉水位表断水，应立即熄火，而不能盲目地增大给水泵的压力。A.①B.①and②C.②D.neither①and②1157Asforaoil-fi

redboilertoomuchairwouldindicatedby_____对于烧油锅炉，空气过多，火焰呈亮白色。A.yellowishflameB.goldenyellowflameC.milkyflameD.brillian

twhiteflame1158W.H.Rstandsfor_____WHR代表废热回收装置。A.WaterHeadRegisterB.WaterHeaterRe-circulatingC.WasteH

eatRecoveryD.WasteHandleReference1159Whentheboilerloadreturnstonormal,thedrumpressurewillriseandsteambubbleformationwillreduce,causing

afallinwaterlevel.Thisisknownas_____当锅炉负荷回到正常时，锅筒压力上升，气泡减少，水位下降。这种现象被称为“收缩”。A.swellB.shrinkageC.flashoffD.lackofwater1160Adazzlingwhiteburnerfl

ameintheboilerfurnaceindicates_____A.nocombustionB.depositsinthefuel见第1157题。C.excessiveairinthefuelD.coldfueloil1156

A1157D1158C1159B1160C1161Thewaterlevelshowinginaboilerwatergaugeglassisusually____duringworking.A.higherthantheactualdrumwaterlevelB.equaltotheact

ualdrumwaterlevelC.increasingduetosteamcondensationintheglassD.lowerthanactualdrumwaterlevel锅炉运行期间，水位表显示的水位比锅筒实际水位要低。这是因为锅炉水是水和汽泡的混合物(水位表本

身上端通汽下端通水)，向锅炉供水后，等汽泡凝结，水位反而下降。1162Whichofthefollowingmayhardnessoftheboilerwatercause?①scaleformation;1163②tubefailure;③corrosion.炉

水硬度会引起水垢，管子损坏以及腐蚀等问题。A.①and②B.①and③C.②and③D.①②and③1163Theseparationofimpuritiesandwaterfrom_____isessentialforgoodcombusti

onofdieselengines.从燃油中去除杂质和水分，这对柴油机发火燃烧很重要。A.lubeoilB.fueloilC.turbineoilD.grease1164High-speedrotatio

ninacentrifugalpurifiercanproduceaforce_____theforceofgravity.离心式分油机高速旋转时产生的离心力比重力大几千倍。A.manythousandtimeslargerthanB.the

sameasC.manythousandtimessmallerD.noneoftheabove1165_____areusedtoensurethatshipsdon'tdischargeoilwhenpumpingoutoilywaterfromanyoilcontami

natedspace.船舶上的油水分离器能保证船舶排放舱底水等污水时不排油。A.BoilerB.IncineratorC.OilywaterseparatorD.Sewagetreatmentunit1161D1162D1163B116

4A1165C1166Oilwaterseparatorsareusedtoensurethatshipsdon'tdischargeoilwhenpumpingout_____见上题。A.ballastwaterB.boilerwaterC.bilgewaterD.sewa

gewater1167Thebilgemainismamlgedtodrainanywatertightcompartment_____ballast,oilorwatertanksandtodischargethecontentsoverboard.舱底水总管设计用

来排放除了压载舱、燃油舱和水舱之外的任何水密空间的污水到舷外。otherthan=except。A.ratherthanB.otherthanC.inadditionthatD.exceptfor1168Emulsificationofoilwilloccurwhen

mixedwith___油与水混合后会产生乳化。A.airB.blackoilC.waterD.icecream1169Acentrifugearrangedtoseparatetwoliquidsisknownas_

____离心式分油机设计用来分离两种液体时，被称为分水机。A.anoilywaterseparatorB.apurifierC.acentrifugalcompressorD.aclarifier1170Acentrifugearrangedtoseparateimpu

ritiesandsmallamountsofwaterfromoilisknownas____离心式分油机设计用来分离油中的杂质和少量水时，被称为分杂机。A.anoilywaterseparatorB.apurifierC.acentrifugalcompress

orD.aclarifier1166C1167B1168C1169B1170D1171Whenaclarifierisrunningtheimpuritiesandwatercollectatthebowl_____分杂机运行时，由于杂质比重较大，积聚在分离筒的四周。A.centerB.p

eripheryC.inletD.upperparts1172Formanyyearsmarinecentrifugesweredesignedfor_____operation,thatisthemachinesw

ererunforaperiodduringwhichsolidsaccumulatedinthebowl.Themachinewasstoppedwhentheaccumulatedsolidsbegantoi

mpairitsperformance.很多年以来，离心式分油机被设计成分批运行。意即，分油机运行一段时间，固体杂质积聚在分离筒内，当分油机停止运行时，才开始排渣。A.purifyingB.batchC.longperiodD.temporary117

3Forapurifier,changingtoagravitydiscwithlargerholediameterwillmovetheinterfacetowardsthe___对于分水机，使用较大直径的比重环，油水界面会向分

离筒四周移动。A.bowlperipheryB.bowlcenterC.uppersurfaceD.lowersurface1174Forapurifierchangingtoagravitydiscwithsmallerholediameterwillmovethei

nterfacetowardsthe____对于分水机，使用较小直径的比重环，油水界面会向分离筒中心移动。A.bowlperipheryB.bowlcenterC.uppersurfaceD.lowersurface1175Inanoilywaterseparatortheoi

lwilltravel_____totheoilcollectingspaces.在油水分离器中，油是向上运动到集油室的。A.upwardsB.downwardsC.outwardsD.forwards1171B1172B1173A1174B1175A117

6Whenstarted,acompleteoilywaterseparatingunitisfirstfilled_____.Theoilywatermixtureisthenpumpedthroughtheinletpipeintothecoar

seseparatingcompartment.油水分离器开始工作时应首先注满清水。A.withdirtywaterB.withcleanwaterC.byoilywaterD.bymixedwater1177Ahighrateofseparationbetwe

enoilandwaterisfavoredby_____油滴尺寸大，将有助于油、水分离。A.largesizeofoilglobuleB.lowtemperatureC.highviscosityD.highflowrate1178Ahy

draulicmotormaybedrivenby_____液压马达是由油来驱动的。A.anelectricmotorB.adieselengineC.acompressorD.oil1179Inahy

draulicsystem,_____areusedtoprotectthesystemfromoverpressure.在液压系统中，安全阀用来防止系统超压。A.stopvalvesB.checkvalvesC.safetyvalvesD.reducin

gvalves1180_____areusedforcargohandling.回转式起货机(克令吊)可用来进行货物装卸。A.CranesB.MooringwinchesC.WindlassesD.Foreman1176B1177A1178D1179C1180A1181

Amongthebasiccategoriesofequipment,whichofthefollowingareusedtoallowthehydraulicenergytobecontrolled?

在液压系统中，液压阀可实现对液压能的控制。A.hydraulicpumpsB.valvesC.hydrauliccylindersD.hydraulicmotors1182_____areusedtohandleanchorsandchains.

锚机可用来控制锚和锚链。A.CargowinchesB.MooringwinchesC.WindlassesD.Cargohatches1183Thedrivemotorwillhaveabrakean~ngedt

ofail-safe,i.e.itwill_____theloadifpowerfailsormachineisstopped.起货机的驱动马达具有制动装置进行故障安全保护，当失电时它能支住货物。A.liftB.putC.ta

keD.hold1184_____areusedforhaulinginorlettingoutthewireswhichfastentheshiptotheshore.绞缆机能收进或放出缆绳。A.CargowinchesB.M

ooringwinchesC.WindlassesD.Cargohatches1185Thedrivemotorwillhaveabrakearrangedtofail-safe,i.e.itwill_

____theloadifpowerfailsormachineisstopped.．见第1183题。A.castB.putC.holdD.letout1181B1182C1183D1184B1185C1186Amongthebasiccategoriesof

equipment,whichofthefollowingareusedtoconvertmechanicalintohydraulicenergy7在液压系统中，液压油泵将机械能转变为液压能。A.ThehydraulicpumpsB.Valves

C.HydrauliccylindersD.Hydraulicmotorsl187Amongthebasiccategoriesofequipment,whichofthefollowingisusedtoconve

rthydraulicenergyintocontinuousrotarymotion.?在液压系统中，液压马达将液压能转变为持续的回转运动。A.HydraulicpumpsB.ValvesC.HydrauliccylindersD.Hydraulicmotors1

188_____areusedtolimitthepressureinanyparticularportionandmainlycontrolthepressureafterthevalve.减压阀可用来限制压力，它主要是控制阀后的压力。A.R

eliefvalvesB.CheckvalvesC.SafetyvalvesD.Reducingvalve1189Therotorofthehydraulicmotorrotatesataspeedproportionaltothe_____液压马达转子的回转速度与油量有

关，而与油压无关。A.flowofoilB.pressureofoilC.AandBD.temperatureofoil1190Whattypeofvalveisusedtodirecttheflowofhydraulicfluid?方向控制阀用来引导液压流

体的方向。A.ReliefvalveB.DirectioncontrolvalveC.StopvalveD.Pressurecontrolvalve1186A1187D1188D1189A1190B1191Externalandinternalleakagein

hydraulicsystemsmaybecausedby_____异常振动、部件过度磨损、油压异常等都会引起液压系统内外泄露。A.unusualvibrationB.excessivewornpartsC.abnormalpressureD.anyoftheabove119

2Inageneralcargocrane,_____isfittedtoraiseorlowerthejib.在回转式起货机(克令吊)中，变幅装置用于调节吊臂的高度。A.theslewingmotorB.theluffing

motorC.thehoistingmotorD.noneoftheabove1193Amongthebasiccategoriesofequipment,whichofthefollowingareusedtoconvertthehydraulic

energyintolinearmotion?在液压系统中，液压油缸将液压能转变为柱塞的线性运动。A.HydraulicpumpsB.ValvesC.HydrauliccylindersD.Hydraulicmotors1194Thesingleact

ingcylinderisthesimplestformwherepressureisappliedtothefullareaofthepistonheadtomovetheloadthroughpistonrodextension.Theloa

dcausesrod_____whenthedrivepressureisreleased.单作用式油缸是最简单的形式，压力作用于整个柱塞头部，通过柱塞杆的伸展传递负荷。当驱动压力释放后，负荷将会引起柱塞杆收进。A.contractionB.retractionC

.expansionD.shrinkage1191D1192B1193C1194B1195A1195Inaordinarycargocrane,_____isfittedtorotatethecrane.在回转式起货机(克令吊)中，回转装置用于旋转克令。A.theslewingmotorB

.theluffingmotorC.thehoistingmotorD.noneoftheabove1196Thecraneisusuallymountedonapedestaltoofferadequate_____totheopera

tor.回转式起货机(克令吊)一般安装在平台上，确保向操作者提供足够的视野。A.timeB.spaceC.lengthD.visibility1197Inageneralcargocrane,_____isfittedtoliftthecargol

oad.在回转式起货机(克令吊)中，提升装置用于装卸货物。A.theslewingmotorB.theluffingmotorC.thehoistingmotorD.noneoftheabove1198Whentheunionpurchasederrickis

operated,onederrickispositionedoverthequaysideandtheotheralmostverticallyoverthe_____在吊杆式起货机中，一根吊杆位于码头上方，另一根几乎垂直地位于货舱的

上方。A.dockB.holdC.pedestalD.machineryspace1199Cargohandlingunitisratedaccordingtothe_____tobelifted.货物装卸装置是根据装卸的安全工作负

荷标定的。A.cargocraneB.jibC.safeworkingloadD.oilpressure1196D1197C1198B1199C1200B1200_____playaveryimportantpartinhydraul

icsystemsbypreventingint6ractionbetweendifferentpartsofthehydrauliccircuit.在液压系统中，单向阀起很重要的作用，它能防止液压油路中不同部件之间相互影响。A.MotorsB.Chec

kvalvesC.SafetyvalvesD.Reducingvalve1201Whichofthefollowingcanbeusedinhydraulictransmissionsystem?液压系统中采用液压油。A.HydraulicoilB.Anima

loilC.LightoilD.Fueloil1202_____istheproductionofpurewaterfromseawaterbyevaporationandre-condensing通过蒸发和再冷凝，由海水产生淡水

的过程称为“蒸馏”。A.EvaporationB.CirculationC.CondensationD.Distillation1203Whenavacuumboilingevaporatorworks,thehotjacke

twaterwillpassoverthetubestackand_____theseawaterpassingthroughthetubes.当真空蒸发式造水机工作时，气缸冷却水经过热交换器(海水加热器)，给管内流动的海水加温。A.disposeB.

dissolveC.heatD.dissipates1204Withavacuumboilingevaporator,theremainderofseawaterfedtotheevaporatorispumpedoutby_____对于真空蒸发式造

水机，残余的海水由排盐泵排出。A.abrinepumpB.anairejectorC.afeedpumpD.distillatepump1205Inavacuumboilingevaporator,thefreshwatergenerated

ispumpedoutby_____对于真空蒸发式造水机，产生的淡水由凝水泵泵出。A.abrinepumpB.anairejectorC.afeedwaterpumpD.acondensatepump1201A1202D1203C1204A1205D12

06Whendistillingseawaterthecoolingwaterdischargingfromthedistillerisfedbacktoevaporatorasfeedwater_____当蒸馏海水的时候，蒸馏器排出的冷却水被返回到蒸发

器作为给水，其目的是为了向蒸发器提供温度较高的水，以提高造水机运行的经济性。A.todecreasescaleformationB.forbettercoolingeffectC.formoreeconomicalpurposeD.t

oraisevacuum1207Whendistillingsaltwaterthecoolingwaterdischargingfromthedistillerisfedbacktoevaporatorasfeedwater_____见上题。A.tocutdowntheamounto

fcoolingwaterneededB.topreventanexcessamountofcoolingwaterfrombeingdischargedtothebilgesC.tosupplyhotwatertotheevaporatorformoreeconomi

caloperationD.Noneoftheaboveistree.1208Theprocessduringwhichliquidcontainingareasonableamountofsensibleheatataparticularpressureim

mediatelychangesintosteamafteradmittedtoachamberatalowerpressureiscalled_____在特定的压力下，具有一定显热的液体进人到压力较低的腔室时，迅速地变成蒸汽．这一过程

被称为“闪蒸”。闪发式造水机就是基于此原理。A.boilingoffB.flashevaporationC.condensationD.noneoftheabove1206C1207C1208B1209Compressedairisusedonboardship_

____压缩空气的作用有：启动柴油机、用于气动控制系统、用于气动工具等。A.forstartingdieselenginesB.inpneumaticcontrolsystemC.inpneumatictoolsD.Alltheabovea

retrue.1210Thestartingairbottleshouldbepumpeduptomaximumpressurebythe_____beforestartoftheengine.在发动机

启动前，应使用空气压缩机将启动空气瓶泵至最大压力。A.aircompressorB.refrigerationcompressorC.vacuumpumpD.purifier1211Theprimarytask

ofthecompressedairsystemistodeliverthestartingairnecessaryfor_____压缩空气系统的首要任务是为启动主机输送压缩空气。A.startingtheM.E.B.star

tingtheemergencyelectricalternatorC.drivingthemainturbineD.drivingtheturbocharger1212TheevaporatingpressureinR

22vaporcompressionrefrigerationplantshouldbe_____atmospheric.Ｒ22制冷装置中，蒸发压力应稍高于大气压，以防空气渗入。A.belowB.aboveC.equaltoD.muchlarger

than1213Hotgasdefrostingusesthehotgasfrom_____todefrosttheevaporator.在制冷装置中，一般使用来自于制冷压缩机的高温气体对蒸发器化霜。A.startingairbottlesB.dieselenginesC.bo

ilersD.refrigerationcompressors1209D1210A1211A1212B1213D1214Inarefrigerationplantthe_____needdefrosting.在制冷装置中，蒸发器最易结霜，需要化霜。A.fanB.compressor

C.condenserD.evaporator1215Whatisthesubstancecalledwhichcanreadilybeconvertedfromaliquidintoavapor,andalsofromavaporintoliquidwithareas

onablynarrowrangeofpressure?在一定的压力范围内，能从液体变成气体，又能从气体变成液体的物质，被称为“制冷剂”。A.RefrigeratorB.RefrigerantC.CoolingmediumD.Br

ine1216Afluidcoilwill_____largequantitiesofheatwhenitchangesstatefromaliquidtoavapor.当液体变成蒸汽时，流体的盘管将吸收热量(如在蒸发器中)。A.releaseB.absorbC.developD.

regenerate1217AfluidcoilWill_____largequantitiesofheatwhenitchangesstatefromavapor1218toaliquid.当蒸汽变成液体时，流体的盘管将放出热量(如在冷凝器小)。1219A.releaseB.absorbC.

developD.regenerate1218Thelatentheatofevaporationisdissipatedinthe_____inacompressionrefrigerationsystem.在压缩式装置中，蒸发潜热

是在冷凝器中释放给海水的。A.evaporatorB.condenserC.expansionvalveD.compressor1214D1215B1216B1217A1218B1219Arefrigerantboilsandvaporizesinthe_____inacompress

ionrefrigerationsystem.在压缩式装置中，制冷剂是在蒸发盘管或冷却盘管中沸腾和蒸发的。A.liquidreceiverB.compressorC.condenserD.coolingcoil1220Arefrigerantgivesupheatwhenitgoesth

rough当制冷剂经过冷凝器时释放热量。A.condenserB.regurgitateC.evaporatorD.boilcoil1221Itshouldbeensuredthatonly_____vaporishandledbyther

efrigerationcompressor.应确保进入到制冷压缩机的制冷剂气体是干蒸汽，以防液击。A.humidityB.dryC.steamD.oil1222Intherefrigerationcompressorthetemperatureofthevaporis_____

bycompression.在制冷压缩机中，气体的压力因被压缩而提高。A.raisedB.risenC.reducedD.maintainedconstant1223Ifthecapacityoftherefrigerationcompressoristoosmall,t

heexcessvaporwillaccumulateintheevaporator,causingthepressureto_____如果制冷压缩机的容量太小，过多的蒸汽将会积聚在蒸发中，引起压力升高A.riseB.fallC.bemaintainedconstantD.Noneoftheabo

veistrue.1224Ifthecapacityoftherefrigerationcompressoristoolarge,thesaturationtemperaturewill_____如果制冷压缩机的容量太大，饱和温度将下降。A.riseB.fallC.bemaintain

edconstantD.Noneoftheabove.1219D1220A1221B1222A1223A1224B1225Intheprocessof_____,liquidchangesintogas.在蒸发过程中，液体变成气体。A.evapor

ationB.frostingC.condensingD.compressing1226Sinceheatwillnotflowfreelyfromabodyata_____temperaturetoanotherata_____temperature,itisnecessar

ytoexpendmechanicalwork,heat,orelectricalenergyfromanexternalsourcetoachieverefrigeration.众所周知，热量不能自发地从低温物体传递到高温物体。A.lower/higherB.shallower/d

eeperC.larger/smallerD.higher/lower1227Inacompressionrefrigerationplanttherefrigerantflowsfromtheexp

ansionvalveandthroughthe_____whereitabsorbsheatfromthespacebeingcooledandbecomesagasorvapor.．在压缩式制冷装置中，制冷剂通过膨胀阀后到达蒸发器，在蒸发器中，制冷剂吸收

热量而变成气体。A.compressorB.condenserC.throttlevalveD.evaporator1228The_____compressoranditselectricalmotorareentirelyhousedinagas-ti

ghtcasing.封闭式压缩机和电动马达被整体封闭在气密外壳内。A.open-typeB.hermeticC.AandBD.Noneoftheabove.1229Theheatusedtochangealiquidtoavaporiscalled_____将液体转变成蒸汽的热量，称

为蒸发潜热。A.latentheatoffusionB.latentheatofvaporizationC.specificheatofvaporizationD.latentheatofthegas1230Boththetemperatureandthepressureoftherefr

igerantareincreasedinthe_____1231在制冷压缩机中，制冷剂的温度和压力都升高。1232A.compressorB.condenserC.evaporatorD.expansionvalve12331225A12

26A1227D1998B1999B1230A1931Thecompressorsuctionlineconveystherefrigerantvaporfrom_____to_____压缩机吸人管路将制冷剂蒸汽从蒸发器输送到压缩机。A.condenser/evaporator

B.evaporator/compressorC.compressor/condenserD.Noneoftheabove.1232Thethermalexpansionvalvecontrolstheamo

untofrefrigerantthatisallowedtoflowtothe_____热力膨胀阀用来控制流向冷却盘管的制冷剂量。A.compressorB.coolingcoilsC.condenserD.rece

iver1233Whenthetemperatureoftherefrigerantflowingoutfromthecondenserisbelowthecondensingtemperature,itissaidtobe_____当冷凝器出口的制冷剂温度低

于冷凝温度时，我们称它为“过冷”。A.dryB.wetC.super-cooledD.superheated1234Duringworking,thermostaticexpansionvalveshouldbe_____在工作过程中，热力膨胀阀是根

据负荷来实现制冷剂节流的。A.eitherallthewayopenorallthewayclosedB.normallyfullyopenC.throttleddependingonloadD.controlledbyliquefiedpre

ssure1235TheexpansionvalveonaFreonsystemcontrolsthe_____制冷系统中的膨胀阀可用来控制蒸发器出口的蒸汽过热度。A.superheatofthegasleavingthecompressorB.backpressureinthee

vaporatorC.temperatureoftheiceboxD.superheatofthegasleavingtheevaporator1231B1232B1233C1234C1235D1236Afeelero

rthermalbulbisusedfortheexpansionvalveto_____热力膨胀阀中，使用温包来检测温度。A.detectthetemperatureB.detectthepressureC.heattherefrigerantD.acceleratet

herefrigerant1237Inacompressionrefrigerationplanttherefrigerantisunderlowpressureintheandunderhighpressureinthe

_____在制冷装置中，制冷剂在蒸发器中处于低压，而在冷凝器中处于高压。A.compressor/condenserB.condenser/evaporatorC.throttlevalve/evaporatorD.evaporator/condenser1238Theboili

ngandcondensationpointsofrefrigerantmainlydependonthe_____exert-eduponit.制冷剂的蒸发温度和冷凝温度取决于压力(蒸发压力和冷凝压力)。A.temperatureB

.densityC.volumeD.pressure1239Thefunctionof_____inarefrigerationplantusingFreonistomovemoisturefromallrefrigerationsystem.制冷装置中，过滤干燥器用来去除系统中的

水分A.filterB.filterdrierC.heatexchangerD.aircooler1240Thesaturationtemperatureoftherefrigerantmustbe_____thatrequiredintheevaporatorrefrigerate

dspace.制冷剂的饱和温度应低于蒸发器所需要的温度。A.aboveB.belowC.equaltoD.Noneoftheabove.1236A1237D1238D1239B1240B1241Afterpassingthroughtheexpansionv

alvetherefrigerantshouldbeinthestateof_____经过热力膨胀阀后，制冷剂应该是气、液混合物，A.vaporB.liquidC.solidD.Noneoftheaboveist

ree.1242Therefrigerantflowsthroughtheevaporator,whereit_____heatfromtherefrigeratedspace.当制冷剂经过蒸发器时，从被冷却空间吸收热量。A.ex

tractsB.releasesC.givesnoD.absorbsno1243Inpractice,therefrigerantflowaftertheevaporatorisdesignedtoensurethatthevaporle

avingtheevaporatorisslightly___蒸发器出口的制冷剂蒸汽实际是处于过热状态。A.saturatedB.super-cooledC.wetD.superheated1244Whichofthefollowingwillbedesirab

lepropertiesofrefrigerant?1245制冷剂应具有不爆炸、无腐蚀性，与润滑制不起作用等性质1246①non-explosive;②non-corrosive;③thatitdoes

n'treactwithlubricantsA.①②and③B.①and②C.①and③D.②and③1245Inthe_____refrigerationcompressoroneendofthecrankshaftextendsthroughthecrankcaseh

ouseforconnection,viaacouplingorpulley,toanexternaldrivemotor.在开启式制冷压缩机中，曲轴的一端通过联轴节与外部的驱动马达相连。A.open-typeB.hermeticC.

semi-hermeticD.alltheabove1241D1242A1243D1244A1245A1246Inacompressionrefrigerationplantthehot,highpressurerefrigerantgasiscooledbytheseawa

terandbecomesliquidinthe_____在压缩式制冷装置中，高温高压的制冷剂气体被海水冷却而变成液体。A.compressorB.condenserC.throttlevalveD.evaporator1247Whatisthefunctionofthermostatice

xpansionvalveinacompressionrefrigerationsystem?在压缩式制冷装置中，热力膨胀阀用来控制过热度。A.nonexistentB.forcontrollingpressureC.forcontrollingsuperheatD

.forcontrollingthesolenoidvalve1248Inavaporcompressionrefrigerationtheevaporatingpressureismaintainedconstantbytheactionofthe_____,whichremoves

vaporfromtheevaporatoratthesamerateatwhichitisformed.在压缩式制冷装置中，蒸发压力是由压缩机来维持。A.evaporatorB.compressorC.condenserD.noneoftheabove1249Thedeviceusedforl

ow-pressurecontrolandhigh-pressurecutoutonacompressoriscalleda_____在制冷压缩机中，用来进行高低压控制的设备是压力控制器。A.cutoutB.controllerswitchC.pressu

recontrollerD.cutoutswitch1250Whichofthefollowingmaycausethatthecompressorcutsoffonhighpressurecutoutinarefrigerationplant?①faultyc

ondensing;②toofewrefrigerant;③highdischargepressure;冷凝故障、压缩机排出压力偏高，都会使高压控制器产生动作。而制冷剂不足会引低压控制器动作。A.anyof①and③B.an

yof①)and②C.anyof②and③I).anyof①②and③12511246B1247C1248B1249C1250A1251Whichofthefollowingmaycausethatexcess

ivelywarmwaterleavesthecondenserinarefrigerationplant?①toolittlecoolingwater;②toomuchcoolingwater;③toowarmcoolerwater.冷却水不足、冷却水温过高，都会使冷凝器中冷却水出口

温度偏高。A.①onlyB.anyof①②and③C.anyof①and②D.anyof①and②1252Thepresenceofairinthecondenserofarefrigerationsystem

will____thecondensingpressure.制冷装置中，冷凝器中存在空气将会使冷凝压力升高。A.increaseB.reduceC.maintainconstantD.Noneofthea

boveistrue.1253Whichofthefollowingbestdescribes"overchargeofrefrigerant"?“制冷剂充注过多”即“制冷剂太多”。A.Toomuchrefrigerant.B.Toolittle

refrigerant.C.Refrigerantisranout.D.Runningisover.1254Whatseparatethehighpressuresidefromthelowpress

uresidein1255arefrigerationsystem.?制冷系统中，压缩机和热力膨胀阀将系统分成高压侧和低压侧。A.Condenserandthermalexpansionvalve.B.Kinga

ndsolenoidvalves.C.Compressorandthermalexpansionvalve.D.Condenserandsolenoidvalve.1255Afterfittingbackinpl

acethegearwheels,don'tforgetto_____them.把齿轮装回原地后，不要忘了给它们加油。A.fulfillB.eliminateC.greaseD.bend1251C1252A1253A1254C1

255C1256Thedefectiveplacesinthefurnace____withfirebricks.A.shouldbepavedB.shouldbecleaned炉膛损坏处，应用火砖砌。C.

shouldbedismantledD.shouldbewelded1257Thedesigned____is20tonsperday,butthefreshwatergeneratorcanonlydistil15tonsa

tpresent.造水机设计容量是每天20t，但目前每天只能蒸馏15t，A.displacementB.weightC.powerD.capacity1258The____ofthegravitydiscisto

obig.Itcauseoiltoflowthroughthewateroutlet.Wechangedthediscandnooilisfoundinthewateroutlet.分油机比重环直径过大会引起“跑油”。A.g

ravityB.diameterC.circumferenceD.cylinder1259Waterlevelcontrollersoftheboilermustbekeptoperabletoprotectexternal1260steam-usingplantfromwat

er"____"danger.1261锅炉的水位控制器应保持在可操作状态，以防产生“蒸汽携水”危险。A.carryoffB.carrydownC.carryonD.carryover1260Thesh

aftandspareparts____shouldbewellgreasedinordertoavoidcorrosion.A.inthestoreroomB.inthecylinder物料间的备件应上油以防腐蚀。

C.inthescavengeairboxD.inthewaterbox1261Ifabilgepumpfailedtobuildupdischargepressure,youshouldcheckfor____如

果舱底水泵不能建立起足够的排出压力，应注意检查吸人滤器是否堵塞。A.excessivewaterinthebilgesB.acloggedsuctionstrainerC.oilinthebilgesD.Alloftheabove1256A1257D1258B1259D126

0A1261B1262Blacksmokecomingfromaboilercanbecausedby____1263锅炉油温太低会使排气冒黑烟。A.lowwaterlevelB.highwaterlevelC.excessivelyhighfuelpr

essureD.lowoiltemperature1263MoistureshouldbekeptoutofanR-12systembecauseittendstocause____Ｒ１２制冷系统中存在水分，会引起自动控制器结冰、某些部件脆化以及污染滑油等。A

.icingoftheautomaticcontrolsB.embrittlementofsomepartsoftheautomaticcontrolsC.sludgeinthelubricatingoilD.alloftheabove1264Airthatmayenterarefrige

rationplanttendstocollectinthe____进入到制冷装置的空气积聚在冷凝器的上半部分。A.upperpartofthereceiverB.upperpartofthecondens

erC.downstreamendofthecoolingcoilD.outletendofthecondenser1265Insufficientrefrigerantinarefrigerationplantmayresultin__

__制冷系统中冷剂不足，会导致压缩机吸人压力偏低。A.highdischargepressureB.frostingofthecrankcaseC.hightemperatureoftheoverboardwaterD.lowsuctionp

ressureofcompressor1262D1263D1264B1265D1266Whichwillcausethehighpress~recutouttostopthecompressorinaR-22sys

tem7冷凝器冷却水量不足，会引起冷凝压力偏高，压缩机高压控制器会产生动作。A.CondenserleakageB.AshortageofliquidrefrigerantC.ExcessivefrostontheevaporatorD

.Notenoughcondensercoolingwater1267Blacksmokecomingfromaboilercanbecausedby____空气／燃油比例不合适(空气太少)，会使锅炉排气冒黑烟。A.lowwater

levelB.lowoilpressureC.excessivelyhighfuelpressureD.animproperair/fuelratio1268Aruptureddiaphragminathermostaticexpansionvalvewillcausethevalve

to____如果热力膨胀阀的膜片破裂，膨胀阀将关闭A.openB.closeC.remaininitspositionD.floodtheevaporatorwithrefrigerant1269Whichofthefo

llowingshouldberecordedinOilRecordBookPartI(machineryspaceoperation)?机器处所舱底水的非自动排放和自动排放，这两项操作都应记录到《油类记录簿》第一部分(有关机器处所的操作)A.Nonautomaticdis

chargeoverboardofmachineryspacebilgewater.B.Automaticdischargeoverboardofmachineryspacebilgewater.C.A

andB.D.NeitherAnorB..1270OilRecordBookPartIshallbeprovidedto____MARPOL公约规定，150总吨及以上的油轮和400总吨及以上的非油轮应配备《油类记录簿》第一部分(有关机器处所

的操作)A.everyoiltankerB.everyshipof400tonsgrosstonnageandaboveC.AandBD.NeitherAnorB.1266D1267D1268B126

9C1270B1271Thethirdengineertookthe____andcheckedthetanktableintheof-ficeandrecordedallrelevantdata,aswellascalculat

edthebunkering.二管轮测量了吃水差、核查了舱位表，记录了相关数据并计算了加油量A.waterlevelB.sumplevelC.ballasttanklevelD.ship'strim1272Dirtyoil

mustbe____beforebeingusedagain.脏油再次使用前必须经过净化A.mixedwithcleanoilB.purifiedC.heatedD.strained1273Theemergencybilgesuctionorbilgein

jectionvalveisusedtoprevent____oftheship.应急舱底水吸口用来防止船舶淹水A.proceedingB.overloadingC.collisionD.flooding1274Allbilgesuctionsmustbefittedwithsu

itable____,whichinthemachineryspacewouldbemudboxespositionedatfloorplatelevelforeasyaccess.所有舱底水吸口一般都装设滤器(除应急舱底水吸口外)A.strange

rsB.reliefvalvesC.emergencyvalvesD.strainers1275WhichofthefollowingisNOTonthelistitemstoberecordedinOilRecordBookPartI(machinerys

paceoperation)?“造水机的造水量”该项不需要记录到《油类记录簿》第一部分(有关机器处所的操作)A.Accidentaldischargeofoil.B.Disposalofoilresidues.C.Qua

ntityofwaterproducedbyF.W.G.D.Dischargeofdirtyballastorcleaningwaterfromfueloiltanks.1271D1272B1273D1274D1275C1276Whic

hofthefollowinginfluencesthepositionoftheinterfacebetweentheliquidsealandtheoilinapurifier?比重环影响分油机中油、水之间的界面

A.HeightofthemachineB.TemperatureoftheliquidsealC.GravitydiscD.Bowldiameter1277ForaL.O.purifier,Ifthebackpressureoftheoilou

tletistoohigh,theinterfacebetweenoilandwaterinthebowlwill对于滑油分油机，滑油出口的背压过高，油、水之间的界面向分离简四周移动A.beinterruptedB.movedownwardsC.movedownw

ardsD.retainoriginalposition1278Wheninoperation,itisunavoidablethatasmallamountofoil____throughleak-age,andinordert

ocompensatefortheseleaksthesystemisconnectedtoafeedpump.在运行过程中，不可避免地将会有一些油因为泄露而逃逸A.escapesB.overheatsC.expandsD.ac

celerates;1279Coalescenceisthebreakdownofsurfacetensionbetweenoildropletsinanoil/watermixture,whichcause

sthemtojoinand____insize.“聚合”是指油水混合物中油滴之间表面张力的破裂，然后使油滴聚合，尺寸增大A.expandB.extractC.increaseD.decrease1276C1277C1278A1279C1280Whichofthefoll

owingchemicalswillbeusedwhereprotectionagainstcaustic1281crackingisrequiredinboilertreatment?锅炉炉水处理中，使用硝酸钠来防止苛性脆化A.SodiumhydroxideB.Sodiumcarbon

ateC.SodiumnitrateD.Sodiumpolyphosphate1281Themainsteeringgearmustbeabletosteertheshipatmaximumaheadservicespeedandbecapa

bleatthisspeed,andattheship'sdeepestservicedraught,ofputtingtherudderfrom35degreesononesideto30degreesontheothersidewithinno____对于主操舵装置，应能使舵

在不超过28s的时间内从一舷的35~转到另一舷的30~A.morethan28secondsB.morethan60secondsC.lessthan28secondsD.lessthan60seconds1282Theauxiliary

steeringgearmustbecapableofbeingbroughtspeedilyintooperationandbeabletoputtherudderoverfrom15degreesononesideto15degreesontheothersideinnomorethan___

_withtheshipatitsdeepestservicedraughtandnmningaheadatthegreaterofonehalfofthemaximumservicespeedor____对于辅操舵装置，应能使舵在不超过60s的时间内从一舷的15‘转到另一舷的]5

‘，而船舶的前进速度应不低于7knA.28seconds/7knotsB.28seconds/14knotsC.60seconds/7knotsD.60seconds/14knots1280C1281A1282C1283Specialthrustdevicesareprovidedons

hipstoimprovetheir____atzeroshipspeedwhentherudderisrelativelyineffective.船舶侧推器可提高船舶的机动性能A.brakecapabilitiesB.reversingcapabilit

iesC.maneuveringcapabilitiesD.accelerationcapabilities1284Thetemperature____aliquidchangesitsstatefromliquidtogasdependsupontheliquiditsel

fanduponthepressure____itissubjectedinthecontainingvessel.一种液体由液态变为气态时的温度取决于液体本身，而且取决于它在容器中承受的压力。“在某个温度下”应使用介词“at”；“besu

biectedto”意“承受”，“tO”放于定语从句引导词“which”之前。A.atwhich/towhichB.fromwhich/atwhichC.towhich/fromwhichD.inwhich/onwhich1285WhenmakingentriesintheOil

RecordBook,thedate,operationalcodeanditemnumbershallbeinsertedintheappropriatecolumnandtherequiredparticularsshallberecorded____intheblankspaces.填写《

油类记录簿》时，日期、作业代码和项目编号记录到相应的表格内，所要求的细节应按年月顺序记人到空栏中A.periodicallyB.occasionallyC.chronologicallyD.additionally1286____shallbeprovidedt

oeveryoiltankerof150tonsgrosstonnageandabovetorecordrelevantmachineryspaceandcargo/ballastoperations.MARPOL公约规

定，150总吨及以上的油轮配备(油类记录簿》第一部分(有关机器处所的操作)和第二部分(货油的操作)A.OilRecordBookPartIB.OilRecordBookPartIIC.OilRecordBookPartIorPartIID.OilRecordBookPartI

andPartIIanditsmaincontentis1283C1284A1285C1286D1287ThecoreitemintheOilRecordBookPartIis____《油类记录簿》第一部分(有关机器处所的操作)中，核心项目是C项，其内容是“残油的处理”A.itemA/BAH

ASTOR(21,EANINGOFFUELOILTANKSB.itemB/DISCHARGEOFDIRTYBAIJASTORCI,EANINGWATERFROMFUELOil.TANKSREFERREDTOUNDERSECTION(A)C.itemC/DISPOSA

LOFOILRESIDUES(SLUDGE)D.itemH/BUNKERINGOFFUELOILS1288Accordingtotheinternationalregulationsconcerningthepreventionofpollutionofseaareasfromship

s,thedisposalintotheseaofallplasticsis____MARPOL公约规定，一切塑料制品禁止倾倒人海A.welcomeB.admittedinsomespecialseaareasC.prohibitedD.acceptable1289Ifyo

umustenteraroomorcompartmenttocombatthefire,keepanescapepath____如果进人到一个舱室灭火，应保持一个脱险通道开启A.openB.closeC.opensD.closes1290Uponthecompletionofrequiredtes

ts,a____shouldbeplacedoneachextinguish-er,showingthedateandthepersonwhocompletedthetests.灭火器试验后，应贴上标签，标注试验日期和试验人员A.capB.discC.tagD.cover1287C1288C12

89A1290C1291____,i.e.asteamcooler,mayberifledintheboilersystemtocontrolthesuperheatedsteamtemperature.锅

炉系统中，安装温度控制器来控制过热蒸汽的温度A.AneconomizerB.AnattemperatorC.AwaterdrumD.Adown-comertube1292Airconditioningistheprocessoftr

eatingairtocontrol____itstemperature,humidity,cleanlinessanddistributiontomeetthecomfortrequirementsoftheoccupantsoftheconditionedspace.空

气调节是这样一种过程：同时调节空气温度、湿度、洁净度和进行分配，使其满足空调场所居住者的舒适要求A.instantaneousB.instantaneouslyC.simultaneousD.simultaneously1293Oneofthefunctionsofventila

tionisto____thehumidityofspacescontainingsourcesofmoisture,orto____thetemperatureofspacesnotmechanical

lycooledsuchastheengineroom.通风的一个功能是减少具有湿源之空间的湿度，或降温(如对于机舱)A.increase/reduceB.reduce/increaseC.increase/increaseD.reduce/reduce1294____isthecontr

oloftemperatureandhumidityinaspacetogetherwiththecir-culation,filteringandrefreshingoftheair.能对空间的温度

、湿度进行控制，并能实现空气循环、过滤和补充新鲜空气的过程，是“空气调节”A.RefrigerationB.AirconditioningC.VentilationD.Heating1291B1292D1293D1294B1295____isthecirculationandrefreshing

oftheairinaspacewithoutnecessarilyachangeoftemperature.能实现空气循环补充新鲜空气，但无需改变温度的过程，是“通风”A.RefrigerationB.AirconditioningC.VentilationD.H

eating1296Ifliquidrefrigerantaccidentallycomesincontactwiththeeyes,____immediately.如果液体制冷剂进入到眼睛，应接受医疗。A.n~theeyesB.irritatetheeyesC.washthe

eyeswithaheavyboricacidsolutionD.obtainmedicalhelp1297.Shouldapersonbeovercomeduetolackofoxygenandhighconcentrationofrefrigera

nt,treatwith____如果人员呼人高浓度的制冷剂而缺氧，应对其进行人工呼吸A.freshwaterB.fleshairC.saltwaterD.artificialrespiration1298S

teeringgeamcanbearrangedwithhydrauliccontrolequitm~ntknownasa"____",orwithelectricalcontrolequipment:.舵机系统装有液压遥控马达或电

力控制设备A.telemeterB.telemanometerC.telemotorD.telemometer1295C1296D1297D1298C1299Whichofthefollowingoperat

ionsneedNOTtobeenteredonthe1300OilRecordBookPartI?①Routinedischargeatseaofbilgewatercontainingoilfromthemachineryspacesthrou

ghstrainers;②Bunkeringoffueloil“机器处所含油舱底水的排放”、“燃油的加装”，这两项操作都应记录到《油类记录薄》A.①onlyB.②onlyC.both①and②D.neither①and②1300Whichofthefollowingoperationsnee

dNOTtobeenteredontheOilRecordBookPartI?①Disposalofoilresidues;②Internaltransferoffueloil“残油的处理’’应记录到《油类记录簿)；而“燃油的内部驳运”不需要记录到《油类记录簿》A.

①onlyB.②onlyC.both①and②D.neither①and②1301WhichofthefollowingoperationsneedtobeenteredontheOilRecordBookPartI?①Cleaningoffueloiltanks;②Internaltransfe

roffueloil“燃油舱的清洁’，应记录到《油类记录簿)；而“燃油的内部驳运”不需要记录到《油类记录薄》A.①onlyB.②onlyC.both①and②D.neither①and②1302Whichofthefollowingoperationsnee

dtobeenteredontheOilRecordBookPartI?①Ballast.offueloil,tanks;②Conditionofoildischargemonitoringandcontrolsystem.“燃油舱的压载’，和“排油监视系统的状况”都应记录到《油类记录

簿)A.①onlyB.②onlyC.both①and②D.neither①and②1299D1300B1301A1302C1303Astheairpassesthroughthechargeaircooler,itstempe

raturemaybereducedand1304moisturecondensed,withthecondensateindangerofbeingcarriedintotheengine.Soawaterseparatorshouldbemounte

dbeneaththebottompartoftheengineinletmanifold.Awaterseparatorisusedinorderto发动机进气总管底部装设分水器，是为了清除空气中的凝水A.keeptheairfrombeingcarried

,intotheengineB.keepthemoisturefrombeingcondensedC.keepthedangerfrombeingcarriedintotheengineD.takeawaythecondensatefromtheair1304Withreference

toatworamactuatingmechanism,whichoneofthefollowingstatementisfalse?对于两撞杆的舵机装置，“十字头安装在舵柱上”说法是错误的A.Theramsworkinsidecylinder

s.B.Thecylindershaveglandssealingtheiropenends.C.Theramsareconnectedtoacross-head.D.Thecross-headismountedontheredderstock.1305Withrefere

ncetoanaxialpiston:pump,whichoneofthefolio'wing.statementsistrue?对于轴向柱塞泵，圆柱形套筒必然具有奇数个孔，一般是7个或9个A.Thecyli

ndricalbarreliscoupledtothemotor.B.Thecylindricalbarrelhas~anoddnumberofbores.C.Theboresendinsockets.D.Theso

cketsfitintheswashplate.1303D1304D1305B1306Withreferencetoaradialpistonpump,whichoneofthefollowingstatementsisfalse?对于径向柱塞泵，必然具

有奇数个孔，一般是7个或9个。因此D项错误A.Surroundingthefixedshaftisahollowshaft.B.Thishollowshaftcarriesradialbores.C.EachboreisfittedwithaweJl-lapp

edplunger.D.Therearealwaysevennumbersofbores.1307Withreferencetooperatingafour-mmsteeringgearsystemunderemergencyconditions,whichoneof

thefollowingstatementsisincorrect?对于应急情况下的四撞杆的舵机装置，应记录舵机的缺陷，并通知驾驶台A.Onlyonepumpshouldbeusedanytime.B.Theshipspeedshoed~reducedto70%of.thenor

mal.C.Watchkeepingofthesteeringgear,sh~dbeincreased.D.Limitationsofthesteeringgearshouldbeloggedbutthebridgeneednotbeinformed.1308With,

referencetorolesgoverningstccringgear,whichoneofthefollowingrolesisincorrect?有关舵机的规则规定，客船上的辅助舵机必须是动力驱动的A.Itisrequiredt

hatallshipsareprovided:withtwoindependentsteeringgearsystemsthatisonemainandoneauxiliary.B.Theattxil~gearcou

ldbepoweroperatedinpassengerships.C.Theauxiliarygearmustbeofadequatestrengthandsufficienttosteeraship

atnavigablespeedD.Allmovingpartsofthesteeringgearmustbeguardedagainstanypossibledamage.1306D1307D1308

B1309Withreferencetoamtm3rvanesteeringgearsystem,whichoneofthefollowingstatementsistrue?对于转口十式舵机系统，3个运动的叶片和3个固定的叶片组成6个压

力腔室A.Thethreemovingvanesandthethreefixedvanesformthree,pressurechambers:.B.Thethreemovingvanesandthe

threefixedvanesformsixpressurechambers.C.Thethreemovingvanesandthethreefixedvanesformnineprman'echambers.D.Thethreemovingvanesandthe

threefixedvanesformtwelve~chambers.1310Largepipesordown-comersarefittedbetweenthesteamdramand____toensuregood

naturalcirculationofwater.对于D型锅炉，在蒸汽筒和水筒之间安装的下行水管用来确保水的自然循环A.fire-tubesB.furnacesC.waterdrumsD.waterwall1311Whenacentrifugeisarrangedto

separateimpuritiesandsmallamountofwaterfromoil,itisknownasa____1311．离心式分油机设计用来分离杂质和少量水分，被称为分杂机A.purifierB.separatorC.filterD.clarifier131

2Toppingwiresfixtheheightofthederricksand____tothedeckmaybeusedtopreventforeandaftmovement.吊杆式起货机中，顶索用来固定吊杆的高度，而牵索(稳索)用来防止吊杆

前后晃动。A.staysB.winchesC.barrelsD.brakes1309B1310C1311D1312A1313____unitismountedsoastoraiseandlowerthecablefromthesp

urlingpipe,whichisatthe~topandcenterofthec~orcablelocker.,1313．锚链轮装置用于从锚链管中升、降锚链。A.ThecablelifterB.hoi

stingmotorC.ThetoppingwireD.Thefife-raft1314____ordramisusedforhaulinginorlettingoutthewiresor.~whichwillf

astentheshiptotheshore1314．绞缆卷筒用于收进或放出缆绳。.A.ThewinchmotorB.ThebandbrakeC.ThewinchbarrelD.Theanchorcapstan1

315Excessivelywarmwaterleavingcondensermaybecausedby____1315．冷凝器中冷却水太少或温度太高，会引起冷凝器出口水温过高。A.fouledtubesinshellandtubecondenserB.toolittleortoowarmcond

enserwaterC.airornon-condensablegasinsystemD.overchargeofrefrigerant1316Tworamsofthehydraulicgeararelin

kedattheirouterendsto____byacrossheadand:swivelblock.1316．液压舵机的两个撞杆的外端通过十字头和转环与舵柄臂相连。A.thepistonrodB.thetillarmC.theconnectingrodD.therudder1317___

_connectedto~themovingtillerwillbringthefloatingleverpivotandtheleverintotheatrightanglestothescrewshaftaxis.1317．与舵

柄相连的反馈杆将浮杆带到与轴线成合适角度的位置上。A.Acut-offleverB.AswivellockC.Across-headD.Adrivinggear1313A1314C1315B1316B1317A1318____systemisarrangedtoensurethat

watercanbedrawnfromanytankortheseaand~dischargedtoanyothertankortheseaasrequiredtotrimthevessel.压载水系统用来确保能从任一个舱或海中吸人海水，也能将水排到任一舱或海中达到平衡船舶之目的

A.ThedomesticwaterB.BilgewaterC.OiltransferD.Theballast1319Largepipesor____arefittedbetweenthesteamandwaterdrumstoensuregoo

dnaturalcirculationofwater.1319．对于D型锅炉，在蒸汽筒和水筒之间安装的下行水管用来确保水的自然循环。A.fire-tubesB.furnacesC.down-comersD.soo

t~blowers1320Thewaterlevelinthegaugeglasswhenaboilerisoperatingis____whentheboilerisshutdown.1320．锅炉运行时，水位表中水位比停炉时的要高。A.;lowertha

nB,higherthanC.belowD.equalto1321Underrotarypumpsarethegear,____,cam-and-pistonandscrewtypes.1321．齿轮泵、叶片泵、凸轮柱塞式泵和

螺杆泵都属于旋转式泵。A.reciprocatingB.diffuserC.turbineD.vane1322Whenthewaterproducedfrommost~evaporatorissuppliedfordrin

kingpurpose,itmustbetreatedtoensureitisbiologicallypureand____1322．造水机产生的淡水用之于饮用，必须经过处理，使其纯洁并呈微碱性。A.slightlyaci

dicB.slightlyalkalineC.nosaltyD.slightlybitter1318D1319C1320B1321D1322B1323____providestheheadorpressuret

osupplythedomesticwaterwhererequired.日用水系统中常采用压缩空气提供压头，确保供水。A.ThecompressedairB.ThecompressingairC.ThetransferpumpD.Theheadtank1324maybefitted

foroperatingthederricktoppinglift(the'wirewhichadjuststhederrickheight).1324。吊杆式起货机中，卷绕端用来操作吊杆的顶索。A.AcapstanB.AholdC.AwarpendD.Amoor

ingdrum1325The____isusedforhaulinginorlettingoutthewiresorropes.1325，绞缆卷筒用于收进或放出缆绳。A.windlassB.anchorcapst

anC.turninggearD.winchbarrel1326Manuallyoperatedbandbrakesmaybefittedand____willhaveabrakearrangedtofait-safe.1326．起货机的驱动马达应具有制动

装置，用来故障安全保护。A.thedrivepumpB.thedrivemotorC.thewarpendD.thepurchase1327Incargocrane,____forliftingtheload.1327．克令吊中，提升装置用

来提升货物。A.ahoistingmotorB.aluffingmotorC.amooringmotorD.aslewingmotor1328Theenginefueloilsystemshouldbeprimedbyu

sing____,andthesystemclearedofairbymeansofthevariousairventcocks.1328．备车时，发动机燃油系统应使用引液泵，使系统注油A.theprimingpumpB.thetransferpumpC.thehy

draulicpumpD.injectorpump1323A1324C1325D1326B1327A1328A1329Domesticwaterpumpisstartedautomaticallyby____whichoperatesas

thewaterlevelfallstoapredeterminedlevel.日用水泵是由压力开关自动启动。A.alevelcontrollerB.atemperatureswitchC.apressureswitchD.afloatingball1330____isarrang

edforcleaningthelubricatingoilintimsystemandcleanoilcanbeprovidedfromastoragetank.1330．离心式分油机用来清洁系统中的滑油。A.AfilterB.Acen

trifugeC.AdistillerD.Agenerator1331Thepumpsemployedonboardshipcanbedividedintotwomaincategories,i.e.pumpsandcentrifugalpumps.133

1．泵可以分为两大类：容积式泵和离心泵。A.gearB.non-positivedisplacementC.positivedisplacementD.rotary1332Inacompleteoil/waterseparator,moreoilw

illseparateoutontotheundersideoftheseplatesandtraveloutwardsuntilitisfreetoriseintotheoilcollectingspace.What'sthemeaningof"it"inthesentenceab

ove?1332．在油水分离器中，更多的油将会在捕集板上分离出来，并向外流动，直到能自由地上升到集油室。显然，句中“it指的是"oil"。A.aseparatorB.oilC.waterD.anoilcollect

ingspace1333Undercentrifugalpumpsarethevolute,diffuser,mixed-flow,axialflowandorregenerativetypes.1333．离心式泵有：涡壳式、扩压式、混流式、

轴流式和透平式等A.reciprocatingB.hydraulicC.turbineD.vane1329C1330B1331C1332B1333C1334Ingeneral,____issuitablefordeliveringsmall

quantitiesathighpressure.一般地说，往复泵适用于低排量、高压头的场合。A.reciprocatingpumpB.gearpumpC.centrifugalpumpD.vanepump1335Inapurifier,theinterfacebetweenthel

iquidsealandtheoilshouldbepositionedascloseaspossibleto____1335．在分水机中，油水界面应尽可能地靠近分离筒的四周。A.theoutletofoi

lB.theoutletofwaterC.thebowlperipheryD.thecenterofbowl1336Bottomblowvalvesareinstalledonauxiliarywater-tubeboilersto____13

36．辅助水管锅炉安装下排污阀用于清除锅炉给水中脏物。A.removesuspendedandprecipitatedsolidsfromtheboilerwaterB.completelydraintheboilerinaneme

rgencysituationC.preventhardenedscaledepositsinthewaterdnnn...D.removefloatingimpuritiesfromtheoilywatersurface1337Oilwaterseparatorsareusedtoensu

rethatshipsdon'tdischargeoilwhen____bilgewater.1337．“whenpumpingoutbilgewater”是现在分词短语，作状语。A.topumpoffB

.beingpumpedC.pumpingoutD.itpumpingout1338Additionalheatextractionfromtheexhaustgasescanbeeffectedbyaddingan____sectiontotheunitinplants.1338．从

废气中再吸收热量，这可以通过在装置中添加“经济器”来实现A.aircoolerB.economizerC.injectorD.airblower1334A1335C1336A1337C1338B1339Ifaheavyseastrikestheredd

er,theshockistransmittedthrough____totherams,thiscauseasuddenincreaseinoilpressureinoneofthecylinders.如果大浪打

在舵叶上，冲击力会通过舵柄臂传递给撞杆。A.thecontrolrodB.thehuntinggearC.thefloatingringD.thetillerann1340Thecontrolrodofasteeringge

arpumpisattachedatitsouterendto____1340．舵机泵的控制杆外端与追随机构相连。A.thehuntinggearB.therudderstockC.thereddercontrollerD.thefeedbackunit1341Wheretanksarear

rangedforeitheroilorballast____mustbefittedinthepipeline.1341．对于多个油舱或水舱，管系中必须设置转换阀箱。A.achange-overchestB.aheadtankC.aemergencybilgepumpD.anair

cooler1342~hecontrolspindleoperatestheslipperringor____ofthevariablede-liverypump,whichcontrolsthesuctionanddischargeoftheoil.13

42．控制手柄用来操作变量泵的滑环或倾斜盘，以控制油的吸人和排出，A.servo-motorB.swashplateC.plungerD.cylinder1343____isusedforsensingthetemperatureofthe

roomintheairconditionsystem.1343。空调系统中使用温度控制器来感受空间的温度A.AnexpansionvalveB.AnevaporatorC.AthermostatD.Acondenser1339D1340A1341A1342B1343C1344Accordin

gtothewaythesteeringgearisoperated,thesteeringgearmaybedividedinto:hand-steering,____andautomaticsteering.根据舵机操作方式的不同，可分为手动舵、随动舵和自动舵。A.hydraul

icsteeringB.follow-upsteeringC.remotecontrolsteeringD.aircontrolledsteering1345Thevariouspumpsandlinesare____tos

omeextentsothateachpumpcanactasanalternativeforanother.1345，各种泵和管路在某种程度上互通的，这样每个泵都可作另一泵的备用A.interlockedB.interconnectedC.interferedD.interacted1

346_____aremoresuitableforlargequantitiesatlowpressure.离心泵适用于大排量，低压头场合。A.ReciprocatingpumpsB.RotarypumpsC.CentrifugalpumpsD.Gear134

7Gearpumpsare____typebecausetheydischargeanearconstantamountofliquidregardlessofpressure.1347．齿轮泵是容积式泵。A.positivedispl

acementB.non-positivedisplacementC.mixed-flowD.axial-flow1344B1345B1346C1347A1348Centrifugalp~arenon-positiveandafairly____unit.离心泵的排量不是恒定的，而且压头低。

A.lowpressureB.lowdischargeC.lowspeedD.highpressure1349In____pumpacloseddischargevalvewillnotcauseexcessivepres-1349．对于离心泵，排出阀关闭不会产生过高的压力。sureto~

buildup.A.gearB.vaneC.screwD.centrifugal1350Theemergencybilgesuctionorbilge____isusedtopreventfloodingoftheship.1350．应急舱底水吸口用来防止船舶淹水。A.in

jectionvalveB.reliefvalveC.dischargevalveD.inletfilter1351Centrifugalpumpsarepopularbecausetheyareverysimplein:construction,andproducesm

ooth,constant,____discharge.1351．由于结构简单、排量平稳、连续而且无脉冲，离心泵广为使用。A.non-pulsatingB.pulsatingC.positiveD.non-posit

ive1352____isthebreakdownofsurfacetensionbetweenoildroplets~inanoilwatermixturewhichcausesthemtojoinandincreaseinsize.1352．“聚合”是指油水混合物中油

滴之间表面张力的破裂，然后使油滴聚合，尺寸增大A.WearB.ContaminatingC.CoalescenceD.Coarseseparating1348A1349D1350A1351A1352C1353Theremovalof____fromlubricatingoi

lwillreduceenginewearandpossiblebreakdowns.1353．滑油中去除杂质有助于减少发动机磨损和可能发生的故障。A.contaminatingwaterB.contaminatedadditivesC.contaminat

edfuelD.contaminatingimpurities1354____isusedforwashinganddrinking.1354．日用水系统用于盥洗和饮用了A.TheballastsystemB.ThesaltwatersystemC.Thebil

gesystemD.Thedomesticsystem1355Thepositionoftheinterfacebetweenoilandwaterwithinthecentrifugeisachievedbytheuseof1355．离心式分

油机中，油水之回的界面是通过比重环来实现的。A.gravitydiscB.centrifugalbowlC.astackofdiscsD.mainsealingring1356Ifaheavyseastrikesthe____,theshocki

stransmittedthroughthetillertotherains.1356．如果大浪打在舵叶上，冲击叻会通过舵柄臂传递给撞杆。A.propellerB.rudderC.bowthrusterD.stabilise

r1353D1354D1355A1356B1357Nospecificperiodisgivenfortherenewalofthelubricatingoilfilterelementasthisshouldbedone____afigureof0.7barsisshownonthe

gauge.有关滑汕滤器的芯件的更换，没有特定的周期。—般来说，压力表读数达到０.７bar时应更换。A.whateverB.wheneverC.whereverD.whoever1358Tostarttheeje

ctionprocesstheoilfeedtothecentrifugeisfirstshutoffandtheoilremaininginthebowlremovedbyadmitting____1358．为了开始喷射冲洗过程，首先应切断

向分油机供汕，残留在分离韵内的油通过注入冲洗水去除。A.flashingwaterB.operatingoilC.flushingwaterD.sealingwater1359Theinterfaceb

etweentheliquidseal(water)andtheoilshouldbepositioned____possibletothebowlperiphery.1359．在分水机中，油水界面应尽可能地靠近分离筒的四周。A.asfarasB.assoonasC

.ascloseasD.ascloseras1360Whatisusedtopurifywaterandforeignmattersfromthefueloilinthefollowing?1360土扑由机用来分离燃油中的水分和杂质。A.Compr

essorB.SeparatorC.EvaporatorD.Fuelpump1361Theyunderstandthe____ofautomaticsludgedischargingofthepurifier.Buttheyar

enotgoodinpractice.1361．他们明白分油机自动排污原理A.principleB.principalC.theoryD.ease1357B1358C1359C1360B1361A1362Heresom

eoilintheoilywaterseparator,asaresultofitslower____willseparateandriseintotheoilcollectionspace.在油水分离器中，一些油由于比重小，会分离出来，并上升到集油室。A.temperat

ureB.viscosityC.densityD.velocity1363Thediameterofthegravitydiscistoobig,Itcausesoiltoflowthroughthewateroutlet.Wechangedthediscandno

____isfoundinthewateroutlet.1363．比重环直径太大引起分油机跑油。更换比重环后，发现山水口没有油了。A.waterB.oilC.scaleD.ridge1364Sealinginpu

mpshaftisachievedbymeansofthe____1364。泵轴的密封是通过填料来实现的。A.gasketB.packingC.washerD.spring1365Centrifugalpumps,however,canbedesignedwithanumbe

rofimpellers____toattainalargeamountofliquid.1365．离心泵通过并联的方法，可实现更大的排量。A.inseriesB.inparallelC.assembledD.tog

ether1362C1363B1364B1365B1366Allbilgesuctionmustbefittedthesuitable____,whichinthemachineryspacedbe:mudboxespositionedatfloor-platelevelforeasyacc

ess.所有舱底水吸口应装设滤器。A.strainersB.valvesC.elementsD.separators1367Impuritiesfromtheboilerwatersurface:~canberemovedthrough

the1367．锅炉水面的杂质可通过上排污阀排除。A.safetyvalveB.blowclownvalveC.scumvalveD.feedcheckvalve1368Theexhaustboilersareusedtorecoversomeof____carriedint

heexhaustgasfromthemainengine.1368．废气锅炉用来回收主机废气中所携带的热量。A.waterB.oilC.heatD.steam1369Thedefectiveplaceinthefurnaceshouldbe____withfirebricks.1369．炉膛

损坏处应用火砖砌。A.pavedB.cleanedC.weldedD.dismantled1370Thesafetyvalvesaremountedinpairsto____theboileragai

nstoverpressure.1370．锅炉安全阀用来防止锅炉超压A.useB.releaseC.protectD.effect1366A1367C1368C1369A1370C1371Thesafetyvalveshouldbe____inthepresenceofC/Ea

ndSurveyor.锅炉安全阀应在轮机长和验船师在场的情况下铅封。A.tightenedupB.sealedupC.openedupD.unscrewed1372Betweenthesteamdrumandthesmal

lerwaterdrumbelow,largenumbersofsmallerdiameter____tubesarefired.1372．对于D型锅炉，在蒸汽筒与水筒之间，安装了大量小直径的产汽管。A.fireB.waterwallC.

generatingD.downcomer1373A____boilerisanauxiliaryboilersome~includedinasteamship'sinstallationforsupplyingsteamtoauxiliariesi

nport.辅锅炉，即是辅助性锅炉，有时电包括在蒸汽机船装置中，用于在港口时向辅助机械提供蒸汽。A.monkeyB.donkeyC.wasteheatD.main1374Waterevaporatesor

steamcondensesatthesaturationtemperature,whichdependsuponthepressure,thehigherthepre~are____thesaturationtemperature.1374．水在饱和温度下蒸发，水蒸

汽在饱和温度下冷凝。饱和温度取决于饱和压力，越高，饱和温度也越高。A.themoreB.thehigherC.thelowerD.thehighest1375Thesootblowersareoperatingintheoilfuelboilerthea

ir/fuelratiomust____throughouttheaction,andblowers-greased:afteruse.1375．锅炉吹灰器运行时，空气／燃油的比例应逐渐提高A.beincr

easedB.bedecreasedC.remainconstantD.eitherbeincreasedorremainconstant1371B1372C1373B1374B1375A1376Atnormalseagoing,weuse____insteadofdonkeyboiler.在海上

航行时，使用废气锅炉来代替辅助锅炉。A.aheaterB.apre-~heaterC.anexhaustgasboilerD.thecoalburningbo'der1377Theinternalpartof,boilershouldbecleane

dbyyardiffound.____1377．锅炉内侧发现水垢，应进行清洁。A.scaledB.wornC.deformedD.rusted1378Theoil____inthedischargingwate

rfromoilwaterseparatorexceeds15PPMwithoutalarm,becausethecoilwasburntout.1378．油水分离器出水口油分浓度超过１５ppm，但没有报警．因为线圈烧毁了。A.filterB.holeC.pollutionD.content1

379Theremainingoil/watermixturenowflowsdownintothefineseparatingcompartmentandmovesslowlybetweenthe____intheTurbuloseparator.1379。剩下的油水混合物向下流到细分离室

，并在捕集阪之间慢慢流动、A.catchplatesB.swashplatesC.coverplatesD.bedplates1380GreasetherollerbearingswithH.P.gun.Inthese

ntence"H.P."means1380。使用高压牛枪给滚株轴承加牛油：A.horsepowerB.highpressurecompressorC.handpumpD.highpressure1376C1377A1378D1379A1380D1

381Anchor____areusedinsome.installationswherethecablelifterrotatesaboutaverticalaxis.1382在一些装置中，使用锚绞盘，锚链轮绕

立轴旋转。1383A.windlassesB.drumsC.capstansD.warpends13841382Priortorunningthehydraulicpump,examinethesystemcarefullyandensuretheleverofControlvalvesisin_

___position.13851382．运行液压泵之前，应仔细检查系统，确保控制阀杆处在中央位置?1386A.neutralB.endC.openingD.closure13871383Anchorc

apstansareusedinsomeinstallationwherethecablelifterrotatesabouta____13881383．在一些装置中，使用锚绞盘，锚链轮绕立轴旋转。1389A.

horizontalaxisB.crankshaftC.verticalaxisD.camshaft13901384Ifaheavyseastrikestherudder,theshockistrans

mittedthroughthetillerto____13911384．如果大浪打在舵叶上，冲击力会通过舵柄臂传递给撞杆。1392A.thetillerarmsB.theswivelblocksC.huntin

ggearsD.therams13931385Thehandsteeringisamethodbywhichthemotionoftherudderiscontrolledwith____13941385．手动舵，即舵的运动

是由手动驱动的舵轮来控制。1395A.amotor-drivensteeringwheelB.apneumaticsteeringwheel1396C.ahand-drivensteeringwheelD.anelect

ricsteeringwheel1386Theseincludedeckmachinerysuch~smooringequipment,cranesand____系缆设备、起锚设备、克令吊、舱盖板等都属于甲扳机械。A.boilersB

.bowthrustersC.stabilizers.D.hatchcovers1387Awarpendmaybefittedforoperatingthederricktoppingwirewhichadjuststhederrick____13

87．吊杆式起货机中，卷绕端用来操作吊杆的顶索。A.lengthB.slackC.heightD.~rotationdirection1388Inageneralcargocrane,threeprincipalmovementsare____;__

__;____.1388．对于普通克令吊，三种基本运动是：提升、变幅和回转。A.hoisting/luffing/slewingB.lifting/raising/loweringC.rotating/raising/handlingD.hosting/lowe

ring/moving1389Foroccasionalheavyloads,twocranescanbearrangedtoworktogetherTheoperatingfordeckcranemo

torsmaybehydraulicelectric.1389．克令吊马达的驱动介质可以采用液压油或电力、A.principleB.mediumC.instructionD.voltage1386D1387C1388A1389B13

90Inthecargowinch,spurreductiongearingtransfersthemotordriveto____在货物绞车中，减速齿轮将马达的驱动力传递给卷筒轴。A.thetopinglightB.theboardb

rakeC.thefail-safeD.thebarrelshaft1391Theinnerpartofthecondensershouldbecleanedwith____1391。冷凝器的内侧应用化学剂清洁。A.ga

soilB.dieseloilC.chemicalcompoundD.Freon-121392Theshutteroftheevaporatorwasblockedwith____itmeanstherewastoomuchevaporation.1392．蒸

发器的格栅被冰堵塞了，表明蒸发过度A.iceB.woodenboardC.ironplateD.cottonwaste1393Thequantityofcooledairdeliveredbyanairconditioningunitshould____thesumofthequantity

ofairre-circulatedtotheunitandthequantitymechanicallyexhausted.空调装置输送的冷气量应该与再循环到装置的空气量和机械排出的空气量之和平衡。

A.balanceB.notbalanceC.bemorethanD.belessthan1394Freon12whichisusedtoproduceintensecoldisnormallya____whenatatmosp

hericpressureandtemperature.1394．制冷剂R12在大气温度和压力下是一种气体。A.liquidB.gasC.solidD.wateronly1390D1391C1392A1393A1394B1395Asther

efrigerantpassesthroughthe~valveorifice,itspressureisreducedandpartoftherefrigerantturnsinto1395．当制冷剂经过节流阀时，压力下降，部分制冷剂变成蒸汽。A.liquidB.oilymix

tureC.emulsionD.vapor1396Becausetheexpansionvalveisjust____wayopen,therefrigerantisunderlowpressure,intheevaporator.1396．因为膨

胀阀只有少许打开，制冷剂在蒸发器中处于低压。A.littleB.fewC.alittleD.afew1397Therefrigeratingagentcan____atlowtemperatureintheevap

orator.1397、制冷剂能在蒸发器中在低温下蒸发。A.expandB.evaporateC.condenseD.distil1398Faultyoperationofanysystemisindicatedbyverydefinite1398．任何系统的故障运行，都会

以某种征兆显示。A.symptomsB.samplesC.tracesD.tracks1399Theboilingandcondensationpointsofarefrigerantdependonthe____exerteduponit.1399．

制冷剂的蒸发温度和冷凝温度取决于压力(蒸发压力和冷凝压力)。A.temperatureB.pressureC.velocityD.heat1400Inthecondenser,thehot,hi~pressurerefrigerantgasiscooledbytheseaw

aterandbecomes____1400．在冷凝器中，高温高压的制冷剂气体被海水冷却而变成液体A.freshwaterB.vaporC.mixtureD.liquid1395D1396C1397B1398A13

99B1400D1401Weuse____todistillfreshwaterfromseawater.使用造水机，从海水中蒸馏淡水。A.engineB.seawaterpumpC.cylindercoolerD.freshwatergenerator

1402Becauseofthereduced____inthevacuumboilingevaporator,someoftheseawaterboilsasitflowsthroughthetubes.1402．由于真空蒸发式造水机的压力较低，海水经过管子时便蒸发了。

32A.temperatureB.waterlevelC.pressureD.rateofflow1403Thefreshwatergeneratorproducesfreshwater____1403．造水机通过海水的蒸发来产生淡水。A.bycoolingseawaterB.by

heatingseawaterC.byevaporationofseawaterD.bypurifyingseawater1404Cleanoilisachievedinaclarifierbowlwherethe

impuritiesandwatercollectatthebowl____1404．在分油机中，杂质和水都积聚在分离筒的四周。A.bottomB.topC.centerD.periphery1405Thedesignedcapa

cityis25tonsaday,:butthefreshwatergeneratorcanonly____22tonsatpresent.1405．造水机的设计容量是每天25t，但目前每天只能蒸馏22A.consumeB.distillC.

runD.operate1401D1402C1403C1404D1405B1406Intheprocessof____,liquidchangesintogas.在蒸发过程中，液体变成气体。A.evaporationB.frostingC.condensingD.compressing140

7Morethanonestageofevaporationcantakeplacebyadmittingtheseawaterintochamberswithprogressively____pressure

inth~flashevaporator.1407．在闪发式造水机中，通过让海水进入到压力渐低(真空度渐高)的几个腔室中，实现多级蒸发。A.lowerB.higherC.thelowerD.thehighe

r1408Youmusttakegoodcareofthedrainagecockoftheaircontrolsystem.Because____leadsscaleformedwhichmightmalfunctionsthepilotcontrolvalveandotherin

struments.1408．对于空气控制系统的放残旋塞应仔细照料，因为水分会引起水垢，从而使控制导阀和其他仪器失灵。A.thetemperatureB.therustC.thepressureD.thehumidity1409Keepcompartment____asthegmgive

noffcanbedangerous.1409．应保持舱室良好通风，因为释放的气体很危险。A.wellventilatedB.wellcleanC.ingoodorderD.moreroom1410Gearpumpsare____becausetheydischargeanea

rconstantamountofliquidregardlessofpressure.1410．齿轮泵是容积式泵A.negativedisplacementtypeB.turbinetypeC.positivedisplacementtypeD.mixed-flowt

ype1406A1407A1408D!409A1410C1411Theboilerisfired____thedemandforsteamexceedsthatavailablefromexhaustgasheating当蒸汽的需求量超过废气加热产生的蒸汽量时，锅炉便开始烧油运行。A

.wheneverB.howeverC.whereverD.whether1412Anoilwatermonitorisrequiredinordertomeasure____.1412．油分浓度监测器用来监测水中的含油浓度。A.theoilcontentinwaterB.thewaterco

ntentinfueloilC.thewaterlevelinbilgewellD.theoillevelinbilgewell1413OilRecordBookPartIshallbeprovided

toeveryoiltankerof150tonsgrosstonnageandaboveandeveryshipof400tonsgrosstonnageandabove,____oiltankers,torecordrelevantmachineryspa

ceoperations.1413．MARI~L公约规定，150总吨及以上的油轮和400总吨及以上的非油轮应配备《油类记录簿》第一部分(有关机器处所的操作)。otherthan=except。A.aswellasB.aslongasC.ra

therthanD.otherthan1414Thebilgemainisarrangedtodrainanywatertightcompartment____ballast,oilorwatertanksandtodischargethecontentsoverboard1414．舱底水总管设

计用来排放除了压载舱、燃油舱和水舱之外的任何水密空间的污水到舷外。otherthan=except。A.morethanB.otherthanC.inadditiontoD.exceptfor1415Ifoildensityweregreaterthanwater's,theoilsep

arator____1415．如果油的密度比水大，分油机便不能工作A.didworkB.wouldworkwellC.didn'tworkD.wouldn'twork1411A1412A1413D1414B1415D1

416Oilwaterseparatorsareusedtoensurethatshipsdon'tdischargeoilwhenpumpingout____油水分离器用来确保船舶排放舱底水时不排油。A.ballastwaterB.boilerwaterC.bilgewaterD.se

wagewater1417Ahydraulicmachineisonethatuses____todowork.]417．液压设备是使用液体做功的设备。A.liquidB.steamC.gasD.electricity1418Inavacuumdistillationsystem,theca

seisthehigherthepressure,____1418．在真空蒸馏系统中，压力越高，饱和温度也就越高。A.thesaturationtemperatureishigherB.thehigherthesaturationtemper

atureC.thehigheristhe:saturationtemperatureD.thesaturationtemperatureismorehigh1419Becauseofthereduced____inthedisti

llationsystem,someoftheseawaterboilsasitflowsthroughthet~oftheevaporator.1419．由于真空蒸发式造水机的压力较低，海水经过管子时便蒸发了。A.pressureB.temperatureC.densityD.volume1

416C1417A1418B1419A1420Inextremeweatherconditions,eitherhotorcold,controloftheairconditioningplantpresents____difficulties.在tR端气温(太低或太

高)条件下，空调装置的控制几乎不会产生困难。A.fewB.littleC.alittleD.less1421Mostairconditioningunitshave____foradjustingther

atioofrecirculatedfreshair.Caremustbetakennottoreducethefreshairsothatstuffinessorsmellsarise.1421．绝大多数空调装置都有风门，用于调节再循环新鲜空气量。A.ca

tchplatesB.dampersC.regulatingvalvesD.fans1422Fortheintermediatecondition,theftsmustbecorrectlyset____1422．对于中等的气温条件，温度控制器应使用“反复试验法”来设定。A

.bytrialanderrorB.byandlargeC.automaticallyD.veryeasily1423l'necoderastheliquidbecomes,____.1423．液体越冷，蒸发将越侵；A.thefasteritwillevaporateB.theslo

weritwillcondenseC.thesloweritwillevaporateD.thefasteritwillflow1424Whereanexcessivelevelofcontaminationisdetectedanalarmissoundedanddi

vertingvalvesareoperated.Thedischargingliquidisthenpassedto____1424．当油分浓度监测器监测到油分超标时，会发出报警，相关阀门动作，液体排到污水舱。A.over

boardB.abilgewellC.asloptankD.ahotwell1420A1421B1422A1423C1424C1425Whenaboilerisoperating,thewaterlevelinthega

ugeglassreads____whentheboilerisshutdown.锅炉运行时，水位表中水位比停炉时的要高。A.lowerthanB.higherthanC.asmuchasD.thesameas1426St

rainersandfinefiltersshouldbecleanedatintervals,____preventdirtfromgettingunderafuelinjectionpumpvalve.1426．粗细滤器应定期清洗，以防脏物积聚在燃油

喷射泵之下A.inorderthatB.soastoC.sothatD.inadditionto1427Thefinefilterswillbearranged____onecanbecleanedwhiletheotheris细滤器应这样布置

：一台工作时，另一台可以清洁。operating.A.inordertoB.becauseofC.sothatD.soasto1428In____,hotdieselenginejacketwaterpassesoverthestackandheatstheseawaterpassingthro

ughthetubes.1428．当真空蒸发式造水机工作时，气缸冷却水经过热交换器(海水加热器)，给管内流动的海水加温A.aflashgeneratorB.aflashevaporatorC.avacuumboilingevaporatorD.aboiler1425B14

26B1427C1428C1429Inanoilcoolercirculatedbyseawater,theoilisatalargerpressuretheresultbeingthatanyleakinthecoolerwillmeanalossof____在海水循环的油

冷器中，油压比水压高，结果是油冷器发生泄漏时，滑油损失了。A.oilB.seawaterC.refrigerantD.freshwater1430Sedimentcollectsinatubularpurifier____1430．在分水机中，

沉淀物积聚在分离筒的边上。A.ontopcoverB.onsidesofbowlC.indrainlineonthediscsD.onthediscs1431The____dischargeanearlyconstantamountofliquidregardlessof

pressure.1431．不管压力如何，容积式泵总是排出几乎恒定的流量。A.mixed-flowpumpB.axial-flowpumpC.centrifugalpumpD.displacementpump1432Thegear,screw,

andvanepumpsareallclassifiedas1432．齿轮泵、螺杆泵和叶片泵都归类于容积式泵A.variablestrokepumpsB.multistagepumpsC.positivedisplacementpumps'D.triple-port

edpumps1429A1430B1431D1432C1433Whichofthefollowingarecomponentsofamechanicalseal?①stationaryring;②rotationalring:③packing;④spring.静环、转环和

弹簧都是机械密封的部件。A.①,②and③B.①,②and④C.②,③and④D.Noneoftheabove.1434]hepressureheadofawaterpumpisgivenintheunitof____1434．水泵的压头单位可用mＨ20。A.kgB.MPaC.mH20D.No

neoftheabove.1435Avanepumpbelongsto____accordingtoitsworkingprinciple.1435．根据工作原理，叶片泵属于容积式泵。A.reciprocatingpumpsB.po

sitivedisplacementpumpsC.centrifugalpumpsD.centrifugalpump1436Attemptsaremadetoeliminateaxialthrustincentrifugalpumpby____1436．消除离心泵的轴

向力，可使用具有平衡孔的叶轮，也可使用对称叶轮A.providingtheimpellerwithcounterbalancingholesB.theuseofsymmetricalimpellerC.neitherAno

rBD.AandB1433B1434C1435B1436D1437Generatingtubesinwasteheatboilersarefinnedto____废热锅炉的产汽管带翅片，目的是为了增大传热的速度。A.reducegasfl

owturbulenceB.prevente~stgascorrosionC.increasetherateofcombustionD.increasetherateofheattransfer1438Theconcentrationoftotaldissolve

dsolidsinthewaterofanauxiliaryboilercanincreaseasaresultof1438．辅助锅炉给水的总溶解固体含量会因海水污染而提高。A.seawatercontaminationB.frequentsurfaceblowsC.dissolvedoxyg

endeaerationD.frequentbottomblows1439Airchambersareusuallyfittedtoreciprocatinginorderto____1439．往复泵中的空气室用来保持流量稳定。A.increasedischargepress

ureB.increasesuctionvacuumC.developpulsationflowD.keepasteadyrateofflow1440Thewaterinanauxiliaryboilershouldbe,teste

dforchloridecontenttodetermine____1440．对辅助锅炉的给水进行含氯量的化验，用来判断是否被海水污染A.totaldissolvedsolidsB.saltcontamin

ationC.waterhardnessD.chlorinecontamination1437D1438A1439D1400B1441Apositivedisplacementpumpisthatwherethevolumeofthepumpchamberisa

lternately____todrawtheliquidinandthen____toforcetheliquidout.对于容积式泵，泵腔室体积增大时吸人液体，体积减少时则排出液体。A.increased/decreasedB.de

creased/increasedC.decreased/decreasedD.increased/increased1442Whichofthefollowingpumpsareself-priming,andcandealwith

liquidformalevelbelowthepump?①reciprocating;②rotary;③centrifugal.1442．往复泵和旋涡泵都具有干吸能力。A.①onlyB.①and②C.①②and③D.②and③1445Whic

hofthefollowingpumpsareserf-priming,andcandealwithliquidfromalevelbelowthepump?,①reciprocating;②vane③gear.1443．往复泵、叶片泵和齿轮泵都具有干吸能力。A.①only

B.①and②C.①②and③D.②and③1444Apumpissaidtohave"negativesuctionhead"whenthepumpislocated____1444．当泵位于供液管之上时，泵具有“负压头”。A.betweenthesuctionanddischar

geB.belowtheli~dsupplyC.abovetheliquidsupplyD.anyoftheabove1441A1442B1443C1444C1445Ifabilgepumpfailedtobuildupdischarge,pressure,yous

houldcheckfor____.如果舱底水泵不能建立起排出压力，应检查滤器是否堵塞。A.excessivewaterinthebilgesB.acloggedsuctionstraineC.oilinthebilgesD.a

closedskinvalve1446Theadvantageofacentrifugalpumpascomparedwitha1447reciprocatingpumpisthat____1446．离心泵与往复泵相比具有以下优点

：排量连续；无内部阀件；如果排出阀关闭，不会产生过高的压力。A.dischargeiscontinuousB.ithasnointernalvalvesC.uponaccidentalclosingofdischarg

evalve,excessivepressurewillnotbuildupD.alloftheabovearetrue1447Whichofthefollowingpumpsbelongstocentrifu

galpump?1447．扩压泵属于离心式泵。A.Reciprocatingpump.B.Screwpump.C.Diffuserpump.D.Water-ringpump.1448Whileflowingthroughthevoluteinacentrifugal,partofthe_

___energyoftheliquidisconvertedto____energy.1448．当液体经过离心泵的涡壳时，部分动能转换成压力能A.kinetic/pressureB.kinetic/essentialC.pressure/kineticD.press

ure/height1445B1446D1447C1448A1449Whenthereisaflamefailureinanautomaticallyfiredauxiliaryboiler,the____自动锅炉因故障熄火，应切断燃油供应。A.airsupplyis

shutoffB.fuelsupplyisshutoffC.watersupplyisshutoffD.safetyvalvelifts1450Finsareinstalledonthegeneratingtubesurfacesinwasteheatboilersto____1450．废热锅炉的

产汽管带翅片，目的是为了增大传热的速度。A.preventsootfiresintheexhaustsystemB.preventexhaustgaserosionofthetubesC.increasethevelocityofexhaustgasflowD.increas

etherateofheattransfer1451Excessivevibrationofanautomaticallyfiredauxiliaryboilercanbecausedby____1451．自动锅炉的燃

烧脉冲会引起锅炉振动过大。A.airorwaterinthefurnaceB.combustionpulsesC.fueloilpumpfailureD.flamefailure1449B1450D1451B1452Ifthefeedpum

pforanauxiliaryboilerfailstodeliverthefeedwatertotheboiler,thecausemaybe____辅助锅炉给水温度过高，给水泵会失去吸人压头。A.highsteampressureintheboilerB.abnorm

allyhighfeedwatertemperatureC.abnormallyhighboilerwatertemperatureD.steamdemandexceedingfeedpumpcapacity1453Blacksmokecomingfromaboilercanbecausedb

y____1453。空气／燃油比例不合适(空气太少)，会使锅炉排气冒黑烟。A.lowwaterlevelB.lowoilpressureC.excessivelyhighfuelpressureD.animproperair/fuelratio1454Propercombustioninaboil

erwouldbeindicatedby____1454．锅炉正常燃烧火焰应该是金黄色。A.yellowishflameB.goldenyellowflameC.whiteflameD.brilliantwhiteflame1455Thefeed

watertotheboilerwillcomprise1455锅炉的给水包括凝水和少量的补偿水A.condensateB.asmallamountofmake-upfeedC.AandBD.Noneoftheabove.1452B1453D145

4B1455C1456Thefurnaceofaoil-firedboilershouldbe____beforetheoperatingburnerislit.锅炉点火前，应进行扫气。“purge"意“驱气”；而“clearofair"意“清除空气”。A.

filledwithwaterB.purgedC.clearedofairD.noneoftheabove1457Toomuchairinthefurnaceofanoil-firedboilerwouldbeindicated

by1457．对于烧油锅炉，空气过多，火焰呈亮白色。A.yellowishflameB.goldenyellowflameC.whiteflameD.brilliantwhiteflame1458Adonkeyboileris__

__1458．辅锅炉是辅助性锅炉。A.onetosupplysteamtothemainpropulsionturbineB.anauxiliaryboilerC.AandBD.neitherAnorB1459Afeedpumpforanauxiliaryboilermightlo

sesuctionifthe____1459．辅助锅炉给水温度过高，给水泵会失去吸人压头A.boilerwaterlevelislowB.feedwateristoohotC.boilersteamdeman

dislowD.feedwateristoocold1456B1457D1458B1459B1460Thewaterlevelinasteamingboilerwillalways____辅助锅炉的水位将随蒸汽需求量的变化而变化。A.varyasthe

steamdemandchangesB.remainconstantaslongasthefeedpumpoperatesC.fallwhenthesteampressureisdecreasedD.risewhenthesteampressureisincreased1461W

hichofthefollowingconditionscouldcausethefeedpumpforanauxiliaryboilertolosesuction?1461．辅助锅炉给水温度过高，给水泵会失去吸人压头。A.Increaseds

uctionheadpressureB.DecreasedfeedwatertemperatureC.PumprecirculatinglinebeingopentoomuchD.Excessivefeedwatertemperature1462Ifatanormalsteamingconditi

onandwatergoesoutofsightingaugeglassestheactionyoushouldtakeis:①secureoiltofires;②increasefeedpumppressure.1462．自动辅助锅炉的燃油供应系统在发生锅炉水位异常低的情况下，

将自动切断燃油供应。A.①B.①and②C.②D.neither①nor②1460A1461D1462A1463Foaminginthesteamdrummaybecausedby____inaboiler.蒸汽需求量过大会引起蒸汽筒产生汽泡。A.

oxygeninthewaterB.poorboilerdesignC.densitytoohighD.excessivesteamdemand1464Thewaterinanauxiliaryboilershouldb

etesteddailyfor____对辅助锅炉的给水，应每天化验氯含量。A.dissolvedoxygenB.chloridesC.sludgeD.dissolvednitrogen1465Ina____boilerthehotgasesfromth

efurnacepassthroughthetubeswhilethewaterisontheoutside.1465．对于火管锅炉，高温气体在管子内流动，而水在管子外流动。A.water-tubeB.fire-tubeC.exhaustgasD.Noneo

ftheabove.1466____shouldbetestedandadjustedwhentheboilersurveyiscarriedout.1466．当进行锅炉检验时，应对锅炉安全阀作试验和调整A.Theboi

leroiltankB.ThesteampipeC.ThefiresideD.Thesafetyvalves1463D1464B1465B1466D1467Inreadyinganauxiliarywater-tubeboilerforaroutinehydrostaticte

st,whichofthefollowingproceduresshouldbeundertakenpriortofillingtheboilerwithfreshwater.?准备对辅助水管锅炉进行周期性的水压试验，在

注人淡水之前，首先应打开锅炉的放气阀。A.Thesafetyvalveescapepipingshouldbedisconnectedfromthevalvebodyandablankinserted.B.Theboilerventvalvesshouldbeopened.C.Allhand-ho

le/manholecoversshouldbetightenedupasmuchaspossibletoprecludeanyleaks.D.Alloftheabove.1468Adazzlingwhiteburnerflameintheboilerfurna

ceindicates____1468．对于烧油锅炉，空气过多，火焰呈亮白色A.propercombustionB.waterinthefuelC.excessairD.coldfueloil1467B1468C1469Thefuel

supplysystemtoanautomaticauxiliaryboiler,willbeautomaticallyshutdowniftheboiler____自动辅助锅炉的燃油供应系统在发生锅炉水位异常低的情况下，将自动切断燃汕供应。A.salinityisabnormallyhi

ghB.steamdemandistoohighC.waterlevelisabnormallylowD.feedwaterflowislow1470ThecorrectpHvalueofboilerwaterisachieved

bycontinuousadditionofasuitable____tothefeed.1470，锅炉给水合适的PＨ值是通过加入碱性物质来实现的。A.acidB.alkaliC.saltD.Noneoftheabove1471Blacksmokec

omingfromaboilercanbecausedby____1471．汕温低会引起锅炉冒黑烟。A.lowwaterlevelB.highwaterlevelC.excessivelyhighfuelpressureD.lowoiltemper

ature1472____willbeusedtoblowawaysootandthecombustionproductsfromthetubesurface.1472．吹灰器用来吹除管子表面的燃烧产物。A.TheblowdownvalveB.ThescumvalveC.Theairrel

easecockD.Soot-blower1469C1470B1471D1472D1473Afteranormal,orsafetyshutdown,automaticcombustioncontrolsystemsforanauxiliaryboileraredesignedtopreventt

heimmediatere-firingofaburnerinorderforthe____辅助锅炉的自动燃烧控制系统能防止锅炉在正常熄火后迅速再次点火，其目的是为了使炉膛再次扫气。A.furnacetobere-purgedB

.electricchargetobuildupintheigniterC.fuelpumptorestartD.drumleveltostabilize1474Impropermaintenanceofanautomaticauxiliaryboilero

ilburnercouldresultin____1474．自动锅炉的燃烧器保养不善，会引起锅炉效率下降。A.fuelpumpfailureB.fanmotorfailureC.increasedfeed-wate

rconsumptionD.decreasedboilerefficiency1475Ifthefiregoesoutinanautomaticallyfiredauxiliaryboilerandtheburnercontinuestosupplyfuel,there

isapotentialdangerof____1475、如果自动锅炉熄火了，而燃烧器继续供油，则有炉膛爆炸的潜在危险A.overpressureanddryfiringB.aseverefurnaceexplosionC.spallingdamagetothebric

kworkD.heatdamagetotheatomize1473A1474D1475B1476Priortolightingoffacoldautomaticallyfiredauxiliaryboiler,youshould____对处于冷态的自动点火锅炉点火前，应检查并调节水位。

A.checkandregulatethewaterlevelB.closetheaircockoncefiresarelitC.blowdownthegageglassD.crackthesteamstoptoassureprot

ectivesteamflow1477Whichofthefollowingitemsisnecessaryforallwasteheatboilerinstallations,regardlessofdesignormanufa

cturer?1477．对于所有废热锅炉装置，必须具有蒸发控制设备。A.Controlofevaporation.B.Aseparatemeanstopreventfeed-watercontamination.C.Powercirculatingpump.D.

Super-heater.1478Forproperoperation,auxiliaryboilerfeedwatermusthavewhichofthefollowingcharacteristics?1478．辅助锅炉的给水应具有适当的碱度以确保锅炉正常运行

。A.Highoxygenconcentration.B.LowpH.C.Properalkalinity.D.Alloftheabove.1476A1477A1478C1479Whenawasteheatboilerisinstalledintheexhaustofamainpropulsion

dieselengine,theexhaustgasbypasswouldbeused____1479．主推进柴油机排气总管后设置废气锅炉，在低负荷时应使用废气旁通以防锅炉产：生腐蚀。A.athighloadstopreventoverheatingB.atlowloadstoprevent

corrosionintheboilerC.duringperiodsofhighsteamdemandD.whentheturbochargerisinoperation1480Whenahydraulicvanep

umpisworking,whichofthefollowingisincontactwiththevanes?①therotor;②theinternalsurfaceofthehousing;③theexternalsurf

aceofthehousing.1480．对于液压叶片泵，工作时，转子和泵壳内侧与叶片接触。A.①onlyB.②onlyC.①and②D.①②and③1481Thermostaticexpansionvalve

are____1481．在工作过程中，热力膨胀阀是根据负荷来实现制冷剂节流的。A.eitherallthewayopenorallthewayclosedB.normallyopenC.throttleddependingonloadD.controlledbysuctionp

ressure1482Whichofthefollowingmaycausethatexcessivelywarmwaterleavesthecondenserinarefrigerationplant?1

483①toolittlecoolingwater;②t~muchcoolingwater;③toowarmcoolingwater.1482。冷凝器中冷却水太少或温度太高，会引起冷凝器出口水温过高。A.①onlyB.anyof①,②a

nd③C.either①or③D.either①or②1479B1480C1481C1482C1483Ifarefrigerationcompressorisrunningcontinuouslywi

thoutloweringtemperatureasnormalintherefrigerator,thetroublemaybe____制冷压缩机持续运转但不降温，可能原因是制冷剂不足。A.excessivec

ondensercoolingwaterB.warmfoodintherefrigeratorC.ashortageofrefrigerantD.ashortageofcompressoroil1484Thecoloroftheflame

onahalidetorchwithoutanyrefrigerantpresentis____1484．对于卤素灯，无制冷剂时火焰呈蓝色。A.blueB.greenC.orangeD.purple1485Thecompressorsuctionlineconv

eystherefrigerantvaporfrom____1485．压缩机吸人管路把制冷剂蒸汽从蒸发器输送到压缩机。A.condensertoevaporatorB.evaporatortocompressorC.compressortocondenserD.Noneoftheab

ove.1486Ifananchorwindlasshasbeenidleforsometime,youshould____1486．如果锚机有一段时间不用了，使用前应润滑A.repackallvalvestemsB.lubricateitpriortouseC.re

placethefoundationboltsD.balancethewarpingheads1483C1484A1485B1486B1487Waterallowedtoaccumulateinthehydraulicsystemoilwillcauseanoxidationprocess

producingby-productswhicharenormally____液压油含有的水分会引起氧化，产生胶质、酸性物质和残碳等。A.gums,acids,andvarnishesB.removedbycellulosetypefiltersC.neutraliz

edbyoiladditivesD.notremovedbyabsorbentfilters1488Itispossibletomountadoublesuctioncentrifugalpumpimpellerwiththevanesfacinginthewrongdirection.Th

iswouldcausethepump____1488．对于双叶轮的离心泵，如果叶片方向安装错误，将使泵效率下降。A.headcapacitytoimproveB.dischargetobereversedC.efficiencytodecreaseD.slippag

etodecrease1489Athermostaticexpansionvalveisproperlycontrollingevaporatorsuperheat.Adjustingthisvalve

tolowerthesuperheatwillresultina/an____1489．热力膨胀阀用于控制蒸发器的过热度，当调节膨胀阀以减少过热度时，将使蒸发盘管流量过大A.evaporatorpressuredecreaseB.e

vaporatorcoilover-feedC.evaporatorcapacityincreaseD.expansionvalvediaphragmrupture1487A1488C1489B1490Aircompressorreceivers

shouldbe"blowndown"atleast____空气瓶每天应放残。A.yearlyB.quarterlyC.monthlyD.daily1491Hydraulicmachineryfailuresarecommonlycausedbymisalignmentof

thesystemcomponentsandby____1491．液压机械的故障通常有系统部件失中和润滑油污染。A.hydraulicfluidcontaminationB.excessivefluidfricti

onC.turbulentfluidflowD.fluidpressuresurges1492Adoublesuctioncentrifugalpumpimpellerhasbeeninstalledinthereversedirection,an

dwill____1492．对于双叶轮的离心泵，如果反向安装，将需要更多功率来驱动离心泵轴，使泵效率下降。A.haveagreaterheadcapacityB.operatewithincreasedimpellereffici

encyC.dischargethroughthesuctionsideofthepumpcasingD.requiremorepowertoturntheshaft1493Ifacentrifugalp

umpwerecontinuallyoperatedwiththedischargevalveclosed,the____1493．如果离心泵在排出阀关闭的情况下持续运转，将不可避免产生过热A.motorcontrolleroverload

wouldopenB.pumpwouldeventuallyoverheatC.reliefvalvewouldcontinuouslycycleopenD.motorwouldoverheat1490D1491A1492D1493B1494Whenyouadjustathermo

staticexpansionvalve,____当调节热力膨胀阀时，在作进一步调节前，应有足够时间让蒸发器工况稳定。A.refrigerantmustbebledoffthesensinglinebeforeadjustmentsaremadeB.allrefrige

rantmustbepumpedintothereceiverbeforeadjustmentsaremadeC.timemustbeallowedforconditionstostabilizeintheev

aporatorbeforefurtheradjustmentsaremadeD.allrefrigerantmustbemutedthroughthedehydratorwhilechangingthesup

erheatsetting1495Hydraulicmachineryfailuresarecommonlycausedbycontaminationofthehydraulicfluidand____1495．液压机械的故障通常有系统部件失中和润滑油污染。A.fluidfri

ctionB.fluidturbulenceC.componentmisalignmentD.pressuresurges1496Therefrigerationsystemlowpressurecutoutswitchisactuatedby____1496．制冷系统的低

压控制器是由吸人管路的压力变化来产生动作的A.anelectricsystemmanagerB.asensingbulbatthetailcoiloftheevaporatorC.pressurechange

sinthesuctionlineD.failureofthekingsolenoidvalve1494C1495C1496C1497Aknockingsoundemittedfromanunloadedaircompr

essorisprobablycausedby____1497．卸载后的空气压缩机发生敲缸，通常是由于活塞松动引起的A.damagedintakevalvesB.excessivelytightmountingbolt

sC.insufficientcylinderlubricationD.aloosepiston1498Whichofthefollowingstatementsistreeconcerninganyevapo

rator.?对于造水机来说，如果凝水导电性好，表明凝水盐度过高。A.Highconductivityofthedistillateindicatesdistillatesalinityisexcessive.B.Increasingthe

absolutepressureoftheshellwillincreasethedistiller'scapacity.C.Meshseparatorsareusedinevaporatorstofilterthedistill

ate.D.Reducingthebrinedensitywillreducetheheatlostoverboard.1499Thesensinglineforthelowpressurecutoutswitchtoarefrigeratio

nsystemislocated____1499．制冷系统低压控制器的输入管路位于压缩机的吸入侧。A.in4hechillboxB.beforethereceiverC.onthesuctionsideofthecompress

orD.onthedischargesideofthecompressor1497D1498A1499C1500Intheproductionoffreshwaterfromseawaterthroughaprocessof

heatingandcooling,thecoolingphaseofproductionisusuallycalled____通过加热和冷却的方法由海水中制造淡水，冷却过程称为“冷凝”。A.evaporationB.disti

llationC.dehydrationD.condensation1501Theprocessofboilingseawaterinordertoseparateitintofreshwatervaporandbrineisusuallydefinedas____150

1．使海水沸腾使之变成淡水蒸汽和盐水的过程，称为“蒸发”。A.dehydrationB.condensationC.evaporationD.dissolution1502Thepurposeofthelowpressurecut-outswitch

isto____1502．制冷系统低压控制器的作用是在预先没定的压力下启、停压缩饥。A.maintainliquidrefrigerantatthesuctionofthecompressorB.main

tainapresetsuctionpressuretothecompressorC.startandstopthecompressoratpresetoperatingpressuresD.operateatminimum

efficiency1503Overheatingofahydraulicsystemmaybearesultof____1503．液压油粘度不宜会引起液压系统过热。A.changingpumpdischargepressureinresponsetonormalloadvariations

B.ahighoillevelC.incorrectfluidviscosityD.continuedslowre-circulationoftheoil1500D1501C1502C1503C1504Condensa

temustbedrainedperiodicallyfromtheaircompressorreceiverstoprevent____空气瓶应定期放残，以防气动阀件误动作。A.secondstagecylinderlock

upB.oilsumpcontaminationC.faultyoperationofpneumaticvalvesD.corrosionofairreceiverbaffles1505Whenaflash-typeevaporatoristobesecuredforanextended

periodoftime,theentireunitshouldbedrained,cleaned,and____1505、如果闪发式造水机要停机一段时间，应放残、清洁并通大气。A.completelyfilledwit

hsaltwaterB.filledwithde-scalingcompoundC.tightlyclosedtoexcludeairD.ventedtotheatmosphere1506Shortcyclingofarefrigera

tioncompressorrefersto____1506．制冷压缩机“短循环”，指的是压缩机启、停频繁。A.frequentlygroundingoutB.frequentlystartingandstoppingC.runningtoofastD.runningtooslow1504C1

505D1506B1507Theemergencybilgesuctionvalveistypicallyused____当舱底进水，而且不能用其他方法排干时，使用应急舱底水吸口排水。A.toinjectcleaningadditiveswhenthebilgesareextremelydirt

yB.whenthemaincondenserbecomesfouled,inordertoprovideadditionalcoolingwatercirculationC.toconnecttheroseboxtotheind

ependentbilgesuctionD.ifthebilgesbecomefloodedandtheycannotbeemptiedbyanyother1508Onallvesselsequippedwithre

frigerationunitsofover20cubicfootcapacity,____1508．具有容积在20ft3以上制冷系统的船舶，必须有合适的气体面罩(能防止所使用的制冷剂J产生的危害)或呼吸面具。A.

agasmasksuitableforprotectionagainsteachrefrigerantused,oraselfcontainedbreathingapparatusmustbeprovidedB.itisthesoleresponsibili

tyofthechiefengineertoascertainthatallmembersoftheengineeringdepartmentarefamiliarwiththeuseofgasmasksorbreathingapparatusC.sp

arechargesshallbecarriedforatleast50%ofeachsizeandvarietyofgasmasksand/orselfcontainedbreathingapparatusD.all

oftheabove1509Whichofthelistedtypessteamtrapsoperatesontheprinciplethathotwaterflashestosteamwhenitsvaporpressureisrapidlyreduced?1

509．脉冲式阻汽器是基于“压力迅速下降，高温的水闪发成蒸汽”原理工作的A.BallfloatB.ThermostaticC.BimetallicD.Impulse1507D1508A1509D1510Theheatgainedperpoundofrefrigerantint

heevaporatorisknownasthe____蒸发器中，每磅制冷剂获得的热量，称为“单位制冷量”。A.latentheatofvaporizationB.sensibleheatC.refrigeratinge

ffectD.specificheatofvaporization1511Theprocessofremovingmoisturefromairisknownas____1511．从空气中去除水蒸汽的过程称为“除湿”。A.humidificationB.d

ehumidificationC.vaporizationD.evaporation1512Acentrifugalbilgepumprequirespriming____1512．离心式舱底水泵需要灌水，因为这种泵无干吸能力A.primarilytolu

bricatetheshaftsealsB.duetotheinabilityofthistypeofpumptoliftwatertocoverthesuction(eye)oftheimpellerC.toinitiallyunloadthepumpbyhaving

itsheadpressureequaltodischargepressureD.inordertoovercomethepotentialenergyofwaterinthedischargeline1510C1510C1511B1512B1513Whichofthe

listedconditionscanleadtocavitationina1514centrifugalpump?离心泵吸入口有气泡，会引起泵产生“气蚀”现象。A.VaporpocketsformedinthesuctionflowstreamB.Roughcasingvolu

tesurfacesC.WornwearingringsD.Heavyfluidintheflowstream1514Whichofthefollowingdescriptionsbestidentifiestheoperating

principalofaflash-typeevaporator71514．在闪发式造水机中，加过热的海永被喷射到真空室(闪发室)。A.Seawaterisheatedtoboilingtemperaturewhileunderavacuum.B.Seaw

aterispassedoverheatedplatesinathinfilm.C.Heatedseawaterisinjectedintoavacuumchamber.D.Seawaterisforcedthroug

haheatedeductor.1515Ifairat95°Cdrybulbtemperatureand50%relativehumidityisconditionedto75°Cdrybulbtemperatureand50%relativehu

midity,itisanexampleof____1515．干球温度从95℃下降到75℃，相对湿度保持在50％，这是一个制冷和除湿的过程A.coolingonlyB.coolingandhumidifyingC.coolinganddehumidi

fyingD.adiabaticcooling1513A1514C1515C1516Whatisafunctionofthewearingringsusedinmostcentrifugalpumps?绝大多数离心泵中使用的耐磨环，其中一个作用是

将排出侧与吸入侧隔离。A.Absorberosionofhighvelocitydischargestream.B.Sealpumpshaftagainstentryofair.C.Isolatethedischargesidefromthesuctionside.D.D

ampentheturbulentdischargeflow.1517Whenliquidreachesthecompressorofarefrigerationsystemthroughthesuctionlin

e,theconditioniscalled____1517．当液态制冷剂通过压缩机吸入管到达制冷系统的压缩机时，会产生“液击”现象。A.floodingbackB.superheatingC.overflowingD.recycling1518Theter

m"pourpoint"isdefinedasthelowesttemperatureatwhichlubricatingoilswillflow____1518．滑油依靠重力能流动时的最低温度，称为“倾点”。A.rapidlyB.bygravityC.throughastandard

orificeataspecifiedtemperatureD.atarateof60ccpersecond1519Areciprocatingaircompressorisnmningroughlyandvibratingexce

ssively,indicatingthatthe____1519．往复式空气压缯机运转不平稳、振动严重，通常是由于机座螺栓松动引起的A.compressorisoverloadedB.motorisoverloadedC.foun

dationboltsarelooseD.beltsaretootight1516C1517A1518B1519C1520Increasingthemoisturecontentofconditione

dairisknownas____增加空气水蒸汽含量的过程，称为“加湿”。A.moisturizingB.dehumidificationC.dampeningD.humidification1521Inaradialpistonpump

,reversalandcontroloffluidflowareaccomplishedbymovingthe____1521．对于径向柱塞泵，通过浮环来实现流体方向和流量控制。A.centralvalveB.radialplungerC.floatingringD.cylinder

body1522Tomaintaindesigndischargepressurefromacentrifugalpump,thedesignclearancemustbemaintainedbetweenthe___

_1522．为了保持离心泵设计的排出压力，在泵壳体和叶轮承磨环之间应保持设计间隙。A.shaftandimpellerB.motorandpumpshaftC.casingandimpellerwearingringsD.lanternringandimpeller1

523Ifaradialpistonhydraulicpumpfailstodeliverratedfluidvolume,thecausecanbe____1523．如果径向柱塞式液压泵不能排出额定的流量，原因可能是吸人通道堵塞，A.contam

inatedfluidB.pittedthrustringsC.wornpintlebearingsD.obstructedsuctionspassage1524Withrespecttocentrifugalpumpimpellers,whichofthefoll

owingdescriptionsrepresentsthecorrectcentrifugalpumpclassification?1524．按照离心泵叶轮数量来分类，可分为单级和多级A.Singlestageormultistage.B.H

ighpressureorlowpressure.C.Openorclosecoupled.D.Horizontalorvertical.1520D1521C1522C1523D1524A1525Thesumofthesensibleheatan

dthelatentheatofanysubstanceisknownas____任何物质的显热和潜热之和，称为“总热量”。A.totalheatB.residualheatC.specificheatD.superheat1526Thestaticsuctionliftofa

pumpisthedifferenceinelevationbetweenthe____1526．泵的静吸人压头是指当液体位于泵下面时泵的中心线与吸入侧液位之间的差。A.centerlineofthepumpandthelevelofthel

iquidinthesuctionwellwhenthesourceofliquidisbelowthepumpB.centerlineofthepumpandthesuctionliquidlevelwhenthesource

ofliquidisabovethepumpC.centerlineofthepumpandthelevelofthedischargeliquidD.liquidlevelsofthesuctionan

ddischarge1527Theheatidentifiedbyonlyachangeintemperatureisknownas____1527．仅以温度改变表现出来的热量，称为“显热”。A.sensibleheatB.latentheatC.total

heatD.residualheat1528Theusualnumberofsingle-actingpistonsusedinavariablestrokeaxial-pistonpumpis____1528．变甩轴向柱塞式泵使用的单作用式柱塞的数

目一般是7个或9个(奇数个)。A.3or5B.5or7C.7or9D.9or111525A1526A1527A1528C1529Anaxialpistonpumpdiffersfromaradialpistonpumpasthepistonsofanaxialpistonpumparepos

itioned____1530轴向柱塞式泵与径向柱塞泵不同之处在于，轴向柱塞式泵的注塞相互平行并轴线平行。1531A.radiallyfromtheshaftB.paralleltoeachothera

ndtotheshaf1532C.paralleltoeachotherbutatarightangletotheshaf1533D.atanangletoeachotherandtotheshaft15341530Inreferencetoairconditioning,wh

enairattainsthemaximummountofmoistureitcanholdataspecifictemperature,itissaidtobe____15351530．在空调中，当空气获得在其特定温度

下能含有的最多水蒸汽时，我们说空气处于”饱和状态”。1536A.superheatedB.saturatedC.condensedD.convected1531Whyareremovablesleevesinstalledo

ncentrifugalpmnpshafts1531．离心泵泵轴上安装可拆卸式轴套，以便磨损后能经济地更换。A.Theymakeiteasiertoreplacethepumpshaftpacking.B.Theycanbeeconomicallyreplacedast

heywearout.C.TheycanberemovedwhenitisnecessarytolightentheweightofthepumpD.Theyincreasethestrengthoftheshaft.1529B1530B1531B1532Ifareciproca

tingaircompressorhasaknockoccurringinfrequencywithitsoperatingRPM,thecauseisprobably____如果往复式空气压缩机运转时经常发生敲击声，可能原因是轴系失

中或主轴损。A.misalignmentorwornmainbearingsB.insufficientcylinderlubricationC.defectiveorpoorlyfittedvalvesD.Alloftheabove1533Whichofthefollowingstate

mentsrepresentstheadvantageofrotarypumpsas旋涡式泵与往复式泵相比的一个优点是它的排量大。comparedtoreciprocatingpumps?A.Thehighdischarge

pressureoftherotarypumpspermitsalargervolumeoffluidperunittimethanthereciprocatingpump.B.Rotarypumpsarecapableofpumpingmorefluidtha

nreciprocatingpumpsofthesameweight.C.Rotarypumpsoccupyonlyone-halfthespaceofreciprocatingpumps.D.Rotarypumpseliminatedischargeslippageofthepum

pedliquid,whilethisdoesnotholdtreeforareciprocatingpump.1534Whichofthefollowingfactorswillhavethegreatest

effectontheheatingloadwithinaconditionedspace?渗热和通风对空调处所的热负荷影响最大。A.Solargain.B.Infiltrationandventilationair.C.Occupantsinsid

ethespace.D.Entertainmentequipmentwithinthespace.1532A1533B1534B1535Whichofthefollowingtermsrepresentstheformofheatremovedfromtherefrigerantinth

econdenserofarefrigerationsystem?1535．制冷系统冷凝器中，制冷剂释放的热量包括：蒸发潜热、压缩热和过热。A.Latentheatofvaporization.B.Heatofcompression.C.Superheat.D.Alloftheabov

e.1536Whichofthelistedproblemscouldproduceahigh~lutepressurewithinaflashtypeevaporator?1536．对于闪发式造水机，如果淡水泵透气管(至淡水泵吸入口的“平衡管”)泄漏，将破坏真空，使绝对压力升高。A.Pro

ductionofhighsalinitydistillate.B.Seawaterfeedtemperaturebelow165~C.C.Aleakinthefirststagedemister.D.Acrackeddistillatepumpventline.153

7Thedewpointofairisreachedwhenthewetbulbtemperatureis____1537．当空气的湿球温度与干球温度相等时，该点称为空气的“露点”。A.twicethedryb

ulbtemperatureB.10~2abovethedrybulbtemperatureC.5~CabovethedrybulbtemperatureD.equaltothedrybulbtemperature1535D1536D1537D1538Increasi

ngthespeedofarotarypumpaboveitsratedspeedwillresultinwhichofthefollowingconditionstooccur?旋涡式泵超速运转，将使间隙增大。A.LossofsuctionB.Increased

clearancesC.DecreasedclearancesD.Decreasedslippage1539Thetendencyforlubricatingoiltothinoutathightemperaturesandthickenatlowtem

peratureswillbecharacterizedbya____1539．如果滑油在高温时变得稀薄，而在低温时变成浓厚，则滑油的粘度指数低。A.lowviscosityindexB.highviscosityindexC.highneutraliz

ationnumberD.lowdemulsibilityquality1540Thetemperatureatwhichwatervaporintheatmospherebeginstocondenseiscalledthe____1540．大气环境下水蒸汽开始冷凝的

温度，称为“露点温度”A.dewpointtemperatureB.condensationtemperatureC.psychometrictemperatureD.absolutehumidity

temperature1538B1539A1540A1541Oneofthemaindifferencesbetweenthevarioustypesofscrewpumpsisinthe____1542各种类型的螺杆泵主要区别之一螺

杆的螺距不同。1543A.stuffingboxdiameterB.directionofrotationofthescrewsC.pitchofthescrewsD.typeofdrivinggears

1542TheFIRSTthingtodotoensurethatarefrigerationunitwillnotstartwhileundergoingrepairs,isto____在进行维修工作时，为确保制冷装置不启动，应首先切断电路

。A.secureandtagtheelectricalcircuitB.placeacrowbarintheflywheeloftheunitC.informallpersonsintheareanottostarttheunitD.makealogbookentry1543Inaref

rigerationsystem,therefrigerant~rbsthelatentheatofvaporizationinthe____在制冷系统中，制冷剂在蒸发器中吸收蒸发潜热。A.compressorB.condenserC.receiverD.eva

porator1541C1542A1543D1544Theonlymeansofremovingthelatentheatofcondensationfroma]1545refrigerantinthenormalrefrigerationcycleisby____在

制冷系统中，去除制冷剂冷凝潜热的设备是冷凝器。A.passingitthroughtheexpansionvalveB.condensingrefrigerantinthesystemcondenserC.p

assingthegaseousrefrigerantthroughtheheatinterchangeronthesuctionsideofthecompressorD.maintainingahighpressureonthesystem'sreceive

r1545Withreferencetoavessel'sstructuralintegrity,themostsignificantcharacteristicofacryogenicliquidisits____1545．低温液体对船舶结构产生的最大危害是发生“冷脆”。A.cap

abilityofcausingbrittlefracturesB.highlycorrosiveactiononmildsteelC.vaporcloudwhichreactsviolentlywithsal

twaterD.toxicityatatmosphericpressure1546Theheatrequiredtochangeasubstancefromasolidtoaliquidwhileatitsfreezingtemperature,isknownasthe

latentheatof____15471546．在冰点温度下将物质从固态转变为液态所需的热量，称为熔化潜热oA.fusionB.vaporizationC.condensationD.sublimation1544B1545A1546A1547Thedegreetow

hichtheviscosityofanoilwillchangewithachangeintemperatureisindicatedbythe____油的粘度随温度变化的程度，可用粘度指数来表示。A.weigh

tdesignationB.viscosityindexC.pourpointD.thermalchangevalue1548Whichoftheprocesseslistedconsumestheg

reatestamountofpowerwhileproducingthegreatestamountofheat?克服滑动摩擦需要消耗最大的功，同时产生最多的热量。A.Overcomingslidingfriction.B.Overcomin

grollingfriction.C.Overcomingfluidfriction.D.Overcomingoilwedgefriction.1549Theheatrequiredtochangeasubstancefromaliquidtoagaswithoutexperiencingatem

peraturechange,isdefinedasthelatentheatof____在温度保持不变的情况下，将物质从液态转变为气态所需要的热量，称为蒸发潜热。A.fusionB.vaporizationC.sublimationD.condensation1550Adistingu

ishingfeatureofaneductor,whencomparedtootherpumps,isthe____1550，喷射泵与其他形式的泵相比，最显著特点是无运动部件。A.dischargeendbeingsmallerthanthesuc

tionendB.smallsizeofimpellerC.lackofmovingpartsD.easeatwhichthewearingringsmaybechanged1547B1548A1549B1550C1551Whensecuringaflash-type

evaporatorforanextendedperiodoftime,youshould____如果闪发式造水机要停机一段时间，应放残、清洁并通大气。A.filltheunitwithsaltwaterB.filltheunitwithde-scaling

compoundC.completelydraintheunitD.tightlysealtheunittoexcludeair1552Whichfeaturesofacentrifugalpumpreducetheneedforrenewingwornimpel

lersandpumpcasings?1552．对于离心式泵来说，由于使用了可更换式耐磨环，减少了更换叶轮和泵壳的可能性。A.Closeradialclearancebetweenimpellerhubandcasing.B.Lowrotational

speedofimpeller.C.Removableendplate.D.Replaceableimpellerandcasingwearingrings.1553Acentrifugalpumpmayfailtodeliverwaterwhenfi

rststartedifthe____1553．离心式泵启动时如果不进行灌水，将不能正常泵水。A.watersealpipeispluggedB.pumpisnotprimedC.sealringisimproperlylocatedD.im

pellerisflooded1551C1552D1553B1554Whichofthedeviceslistediscommontoalltypesofpumps?所有形式的泵，都具有功率端和流体端。A.Apowerendandfluide

nd.B.Apropellerandeducator.C.Avoluteandimpeller.D.Aturbineandpiston.1555Ifacentrifugalpumpvibratesandisnoisywhenoperating,thecausecouldbe___

_如果离心式泵运转时振动严重、噪声大，原因可能是泵轴弯曲。A.wornglandsealingshaftB.wornwearingringsC.abentshaftD.reversedpumpcoupling1556Disti

lledwaterfromanevaporatormaybedischargedintoapotablewatertank____造水机产生的淡水，通过三通式电磁阀的控制，排到日用水柜。A.throughadetachabl

ehoseconnectionB.afterpassingthroughanactivatedcharcoalfilterC.afterchemicalanalysisshowsitisfitforconsumptionD.throughasolenoidoperat

edthree-wayvalve1557Ifthecapacityofacentrifugalpumpdecreasesgraduallyoveralongperiodoftime,youshouldreplacethe____如果离心泵的

排量在很长一段时间内逐渐下降，应更换承磨环。A.packingglandB.mechanicalsealsC.lanternringsD.wearingrings1554A1555C1556D1557D1558Toabsorbthewearresultingfrom

impellerrotationandabrasivesintheliquid,acentrifugalpumpisusuallyfittedwith____为了承受由于叶轮旋转和流体中磨粒而产生的磨损，离心泵通常需要装设承磨环。A.lanterntingsB.bearingsC.c

asingvolutesD.wearingrings1559Personnelworkingwithrefrigerationsystems,andsubjecttotheexposureofrefrigerantsshouldwear____如果对制冷系统进行维修工

作，可能会接触制冷剂，人员应戴合适的面罩。A.faceshieldB.arespiratorC.rubberglovesD.anallpurposegasmask1560Thepurposeofanaircompresso

runloadingdeviceisto____空气压缩机卸载设备的主要目的是推迟压缩过程，直到马达达到一定的转速。A.drainwaterfromtheairreceiverB.drainwaterfromthecylindersC.d

elaythecompressionprocessuntilthemotorisuptospeedD.checkpumpalignment1561Theamountofmoistureinagivensamp

leofair,whencomparedwiththeamountofmoisturetheaircouldholdiftotallysaturatedattheexistingtemperatureofthesample,iscalled____空气含有的水

蒸汽量与其温度下处在全饱和状态时能携带的水蒸汽量相比，称为相对湿度。A.absolutehumidityB.specifichumidityC.effectivehumidityD.relativehumidity1558D1559A1560C1561D1562Whicho

fthefollowingstatementsiscorrectrelativetodistillation1563plantoperation.?蒸馏是这样一种过程：将海水蒸发，产生蒸汽，然后冷凝成淡水。A.Distillationistheprocessofboilingseawat

ertoproducevaporwhichiscondensedintofreshwater.B.Evaporationisthesecondpartofthedistillationprocesswherebrineisremoved.C.Brineistheresu

ltofcondensedseawatervapor.D.Distillateistheproductresultingfromtheevaporationoffreshwatervapor.1563Ifacentrifugalpumpi

sdrivenbyaconstantspeedelectricmotorandproducesadischargepressurelessthandesigned,thecauseisprobably____如果由定速电动机驱动的离心泵，排量小于设

计值，原因可能是承磨环磨损。A.excessivepumpspeedB.excessivesuctionheadC.wornwearingringsD.grosspumpmisalignment1564Theratiooftheweightofmois

turecontainedinagivenvolumeofair,totheweightofmoisturethatthesamesamplewouldholdifsaturated,iscalledthe____空气含有的水蒸汽量与其温度下处在全饱和状

态时能携带的水蒸汽量相比，称为相对湿度A.absolutehumidityB.relativehumidityC.specifichumidityD.totalhumidity1562A1563C1564B1565Whichofthelistedchemicalscanberoutinel

yusedtomaintaintilehygienicqualityofpotablewater?化学剂氯可用来保持饮用水的卫生质量。A.HydrochloricacidB.ChlorineC.SulfuricacidD.Zincchromate1566Thesteamcoilsinahig

hpressureevaporatorusedforsaltwaterserviceshouldbede-scaledwith____1566．高压蒸发器的蒸汽加热盘管，应用钢丝刷清除水垢。A.aneedlegunB.soapandwaterC.awirebrashD.achippingh

ammer1567Thepackinginstalledinthepumpstutfingboxislubricatedby____安装在泵填料箱的盘根由通过填料箱的泄漏液来润滑的。A.gravityandfeedoilcupsB.greas

ecupsC.handduringinstallationD.leakagethroughthestuffingbox1568Ifyouwereoperatingacentrifugalwaterservicepumpwithwornwearingr

ings,the____如果离心泵的承磨环磨损，排量将小于设计值。A.pumpwouldbeverynoisyB.pumpwouldvibrateexcessivelyC.pumpwoulddevelopinsufficientflowD.stuffingboxwouldleakexcessive

ly1565B1566C1567D1568C1569Whichofthefollowingstatementsiscorrectregardinganoilwithahighviscosityindex?粘度指数大的油，温度发生明显变化，其粘度变化很小。A.Alar

gechangeofviscosityoccurswithaminorchangeintemperature.B.Nochangeinviscosityoccurswithanychangeintemperature.C.Verylittlechangeinv

iscosityoccurswithasignificantchangeintemperature.D.Theviscosityoftheoilincreaseswithanincreaseintempera

ture.1570Brinedensityinadistillingplantismeasuredwitha/an____蒸馏装置中盐度是由盐度计来测量的。A.psychrometerB.salinometerC.anemometerD.sphygmomanomete

r1571Oneofthemainfunctionsofwearingrings,asusedinacentrifugalpumps,isto____离心泵使用承磨环；其中一个主要作用是防止泵壳和／或叶轮磨损A.m

aintainradialalignmentbetweenthepumpimpellerandcasingB.absorballimpellershaftendthrustC.preventwaterleakagetotheatmosphereD.preventwearofthepumpca

singand/orimpeller1569C1570B1571D1572Forsafestorage,themaximumallowabletemperaturetowhichrefrigerantbottlesshouldbeexposedis___

_为了安全起见，制冷剂瓶接触的温度不得高于125℃A.100°CB.125°CC.150°CD.175°C1573Afterinstallinganewhydraulicpumpinasystem,whatspeciala

ttentionshouldbegiventothehydraulicsystem?1573．在液压系统中安装一台新的液压泵后，应经常检查粗、细滤器。A.Thereliefvalvesinthesystemshouldbereadjusted.B.Thefi

ltersandstrainersshouldbecheckedfrequently.C.Allsystempressureshouldbereadjusted.D.Thesystemshouldbedrainedandrenewedwithafluidofdif

ferentoperatingcharacteristics.1574Anun-loaderisinstalledonanaircompressorto____空气压缩机的卸载设备能卸走启动时除了摩擦负荷外的所有负载A.bypassthehighpressurestaget

othelowpressurestageon100%oftheaircompressorsinserviceB.preventexcessiveinter-stagepressurebuildupC.controlcom

pressordischargepressureD.removeallbutthefrictionalloadduringstarting1572B1573B1574D1575Whichofthefollowingisoperatedfromthe

mainengineroomconsoleonanautomatedvessel?在自动化船舶上，消防泵和滑油泵是由机舱集控室来操作的。A.FirepumpandlubeoilpumpB.Lubeoilpumpan

ddistillingplantC.DistillingplantandshaftalleydoorD.ShaftalleydoorandfixedC02release1576Ammoniawhenusedasarefrigeranti

svaluablebecauseofitshighefficiency,itishowever____氨用作制冷剂，效率高，但是它有毒、易燃、易爆。A.toxicB.flammableC.explosiveD.alloftheabove1577Whichofthefollowi

ngtermsisusedtoidentifythepressureoftheliquidenteringapump?通常用“吸人压头”来表示进入泵流体的压力。A.SuctionheadB.PumpheadC.DischargeheadD.Totalhead1578Whensub

jectedtohighheatfromaopenflame,oranelectricheatingelement,whichofthelistedrefrigerantswillbreakdownandproducephosgenegas?Ｒ２２制冷剂与高温接触后，会

分裂并产生光气。A.CO2B.MethylchlorideC.R-22D.Sulphurdioxide1576D1577A1578C1579Demulsibilityofalubeoilisdefinedas____滑油的抗乳化性能是指油能从水中分离的能力。A.t

heabili~ofoiltoseparatefromwaterB.thetemperatureatwhichoilflowsrapidlyC.ameasureofthewaterinalubeoilsystemD.anemulsionofdiff

erentgradesofoil1580Theclearancevolumeforasinglestagecompressorisdefinedasthespacecreatedbetweenthe____单级压缩机的余隙容积是指当活塞处于上止点时，活塞与气缸盖之间的容积，包

括到顶部第一道活塞环沿活塞周围的容积以及气阀下的容积A.topofthepistonandbottomsideofhead,withthepistonatBDCB.pistonandhead,includingthespacearoundthepistontothetopoftheu

pperringandunderthevalves,withthepistonatTDCC.bottomofthepistonandbottomsideoftheheadatTDC,regardlessofupperringlocationa

ndvalveplacementD.topofthepistonandbottomsideoftheheadatTDCascomparedtothatwhichexistsbetweenthetopofthepistonandbottomsideofheadatBDC1579A

1580B1581Ifthedischargevalveisclosedbeforethedrivemotorisstopped,whichofthefollowingtypesofpumpswillmostlikelybed

amaged?如果电动机停车前，齿轮泵的排出阀关闭，泵将损坏。A.CentrifugalB.GearC.PropellerD.Turbine1582Whenthereliefvalveopensitd

ischargeshighpressurerefrigerantvaportothe____当制冷压缩机的释放阀打开时，将高压的制冷剂气体排到压缩机的吸入侧。A.liquidstrainerB.refrigerantinletofthecondenserC.in

letsideoftheevaporatorD.suctionsideofthecompressor1583Theabilityofanoiltoseparatecleanlyfromanoilandwatermixtureisreferre

dtoasits____油的抗乳化性能是指油能从油水混合物中分离的能力A.precipitationnumberB.neutralizationnumberC.pourpointD.demulsibility1581B1582D1583D1584Whicho

fthefollowingstatementsistrueconcerningtheoverallefficiencyofaircompressors?从效率角度看，双级空气压缩机的效率高于单级压缩机。A.Highpressurecompressorsaremoree

fficientthanlowpressurecompressors.B.Mechanicalefficiencydividedbycompressorefficiencywillequaltheoverallefficiencyofthec

ompressorunit.C.Twostagecompressorsaregenerallymoreefficientthansinglestagecompressors.D.Thevolumetricefficiencyisdecreasedinmu

ltistagecompressors.1585Toobtainmaximumefficiency,twostageaircompressorsareusually____1586为了提高效率，双级空气压缩机装有中冷器。A.horizontallymountedB.neve

rfittedwithintakefiltersC.fittedwithintercoolersD.operatedinanunloadedconditionatalltimes1584C1585C1586Thefunctionofthehydraulicte

lemotortransmitterusedinanelectro-hydraulic1587steeringgearsystemisto____电动／液压舵机系统中的遥控液压发送器的功能是将液压信号发送到接收装置。A.trans

mittherudderangletothebridgeindicatorB.preventthecontrollinkagefromstrikingthestopswhenhardoverC.automaticall

ypurgeallentrainedairfromthesystemD.sendhydraulicsignalstothereceivingunit1587Whichofthefollowingstatementsis/aretruerega

rdinghydraulicpumpsingeneral?对于齿轮泵，排量的改变只能通过改变泵的转速来实现。A.Variablevolumescanbeobtainedwithgearpumpsonlybyvariationofthepumpdr

ivespeed.B.Aradialpistonpumphousesslidingpistonsinastationarycylinderblockthroughwhichpassesarotatingpintl

eorportedshaft.C.Theamountoffluiddisplacedperrevolutionofanaxialpistonrotarypumpisdependentontheangleformedbetweenthecylinderblocka

ndvalveplate.D.Alloftheabove.1588R-12isgenerallyconsideredtobeasafe,nontoxic,nonflammable,andnon-explosiverefrigerant.Itcan

,however,becomehighlytoxicwhenR12制冷剂无毒、不易燃、不易爆。但与明火接触时，会有很高的毒性A.superheatedoutsidethesystemB.incontactwithanopenflameC.heatedtotheboilingpoi

ntD.Alloftheabove.1586D1587A1588Belectn)1589Arefrigerationsystemcontaminatedwithmoisturecanbeaffectedby____制冷系统中存在水分，会形成酸性物质、沉淀，并在膨胀阀处结冰。

A.acidformationB.sludgeformationC.iceintheexpansionvalveD.Alloftheabove1590Somechloronatedflourocarbonrefrigerantsmay

decomposeintoatoxicirritatinggasifitis____氟氯化饱和碳氢化合物的制冷剂与高温接触后，会分解出对人体有害的氟化氢、氯化氢及光气。A.storedattemper

aturesbelow60degreesFahrenheitB.chargedintoasystemhavingcopperfittingC.allowedtomixwithcompressoroilD.exposedtoano

penflameorhotsurface1591Whichofthefollowingstatementsdescribestherelationshipbetweenviscosityandspecificgravity?如果不明确或限制其他条

件，粘度与密度没有直接关系。A.Liquidswithdifferentviscositieswillalwayshavethesamespecificgravity.B.Liquidswithdifferentviscositieswillneverhavethesames

pecificgravity.C.Viscosityandspecificgravityaredirectlyproportional.D.Viscosityandspecificgravityarenotrelatedi

nthatonedoesnotdefineorlimittheother.1589D1590D1591D1592Thedeliveryrateofavariablestrokeaxialpistonhydraulicpumpiscontrol

ledbyvaryingthepositionofthe____变量轴向柱塞式液压泵的输出速度是通过改变倾斜盘的位置来控制的。A.slideblockB.tiltingboxC.pintleD.reactionring1593Thepressureofaliquidleavingth

epumpcanbereferredtoasthe____液体离开泵时的压力，称为排出压力。A.totalheadB.dischargeheadC.netpositivesuctionheadD.suctionhead1594Tubeleaksinthedistillatecool

erofatwostageflashevaporatorwillresultin____1594．两级闪发式造水机，淡水冷却器管子泄漏将会造成淡水污染。A.lossofsecondstagevacuumB.contaminationofthedis

tillateC.lowerfeedinlettemperatureD.contaminationofthesecondstagecondenser1595Airleakagebetweentheshaftandstuffingboxpackinginacentrifugalp

umpis在离心泵中，泵轴和填料箱盘根之间的漏气是通过液封来防止的。A.acompressedpackingglandB.lanternringsbetweenthepackingringsC.aliquidsealD.thestuffingbox

gland1596Thesuction-forceprincipleofoperationisatypicalcharacteristicof____往复泵是基于“吸力”原理来工作的。，A.centrifugalpumpsB.jetpumpsC.propellerpumpsD.

reciprocatingpumps1597Hydraulicpumpsmostcommonlyusedinsteeringsystemsareofthe____舵机系统中使用的液压泵通常是轴向柱塞泵。preventedby____A.lobetypeB.s

crewtypeC.axialpistontypeD.volutetype1592B1593B1594B1595C1596D1597C1598Anadditiveusedtoimprovetheabilityofalubeoiltoreducefrictio

nisknownasa/an____用来改善滑油减少摩擦能力的添加剂称为“极压剂”。A.suppressantadditiveB.dispersantadditiveC.extremepressureadditiveD.viscosityimprove

radditive1599Inanelectro-hydraulicsteeringgearsystem,whenwillthevariabledisplacementpumpbeplacedonstroke?1599．对于电动液压舵机系统，当舵角与舵轮位置不同时，变量泵才会产生吸排油的动作

?A.Whenthehelmisatanyangleotherthanamidships.B.Whenthesix-wayvalveisopened.C.Whentheramreliefvalveshft.

D.Whentherudderangleisdifferentfromthepositionofthehelm.1600Whichofthelistedoperationswillcauseanautomaticallycontrolledrefrigerationcompressort

orestart?吸人压力升高会引起自动控制的制冷压缩机重新启动。A.ClosingofthesolenoidvalveB.ClosingoftheexpansionvalveC.AnincreaseinthesuctionpressureD.Decreasingthesuctio

npressure1598C1599D1600C1601Saltwateristypicallyprovidedtoarefrigerationsystemto____向制冷系统提供海水，是用来冷却制冷剂气体。A.cooltheexpansionva

lveB.preventrefrigerantsuperheatingC.condensetherefrigerantgasD.preventmotoroverheating1602Undernormaloperatingconditions,therudderishydraulicallylo

ckedunless____在正常工作状态下，舵是被液压锁紧的，除非控制系统发出舵角信号。A.themanualtrickwheelisengagedforsteeringB.thevariablestrokepumpisoffstrokeC.aredd

erorderisgivenbythecontrolsystemD.anelectricpowersystemfailureoccursatthesteeringgear1603Whichofthefollowingstatementsiscorrectc

oncerningtheviscosityoflubricatingoil?滑油的粘度是表示滑油流动时的内阻力。A.Viscositywillincreaseastemperatureincreases.B.Viscosityisameasureof'afluid'sinterna

lresistancetoflow.C.Viscositywilldecreaseastemperaturedecreases.D.Viscosityisnotdependentontemperature.1601C1602C1603B1604Th

epourpointoflubricatingoilsisaffectedthemostbywhichofthefollowing?滑油的倾点受石蜡含量的影响最大A.Extensivecentrifuging.B.Waxco

ntent.C.Watercontent.D.Acidcontent.1605Theviscosityofanoilisameasureofits____油的粘度是表示油流动时的内阻力。A.weightB.internalf

rictionC.demulsibilityD.S.A.E.number1606Althoughlubeoilsusedinthemainlubricatingservicesystemsshouldhavearelativelyhighflashpo

inttoavoidignition,theycancreatesmokeandfirehazardswhenthey____1606．尽管润滑系统中的滑油具有相对较高的闪点以防着火，但是当它们与温度特别高的表面接触时仍会产生烟雾甚至火灾。A.areexposedtoavacuumB.co

meincontactwithextremelyhotsurfacesC.arereducedintemperaturetojustabovethepourpointD.becomeextremelyagitatedoraerated1607Hydrauliccranesmustbepr

operlywarmned-upbeforebeingoperatedbecause____1607．液压克令吊使用前应首先进行适当暖机，以确保液压油处在适宜的粘度A.warm-upallowsthehydraulicsystemtobec

omechargedwithoilB.warm-upallowsthereliefvalvestobeproperlytestedC.hydraulicstrainersoperateonlyduringthewarm-u

pperiodD.hydraulicfluidmustbeattheproperviscosity1604B1605B1606B1607D1608Whichofthefollowingstatementsd

escribesthefunctionofanaircompressorintakefilter?1608．空气压缩机进气滤器的作用是防止空气中携带的固体颗粒产生损坏作用。A.Protectsagainstsuctionvalvefl

oat.B.Providesapositivepressureontheairinletvalves.C.Preventslubricatingoilcontaminationofthecompressedairsupply.D.Protectsagainstthedamagingeffects

ofairbornesolidparticles.1609Whichofthelistedcharacteristicsoflubeoilarethemostimportanttotheenginee

rfromanoperationalstandpoint?1609．从操作观点来看，滑油的粘度、酸值和抗乳化性能等指标最重要。A.Ashcontent,carbonresidue,andgravityB.Viscosity,

acidity,anddemulsibilityC.Pourpoint,flashpoint,andprecipitationnumberD.Auto-ignitionpoint,viscosityindex,andfilmstrength161

0Asalinityindicatingsystemfunctionsonthebasicprincipleofmeasuringthe____1610．盐度指示仪是通过测量水的导电性来测量盐度。A.electricalinductan

ceofwaterB.electricalconductivityofwaterC.specificgravityofwaterD.hydrogenionconcentrationofwater1608D1609B1610B1611Inaflashtypeevaporator

,allsaltwaterheadersareventedthroughindividualventcockstothe____1611．在闪发式造水机中，所有的海水加热器通过各自的透气管通大气。A.saltwater

heatershellB.second-stagecondenserC.atmosphereD.second-stageflashchamber1612Anaxialpiston,variablestrokepumpisusedinavessel'shydraulicsteeringgear.U

nderpressure,oilcontinuallyleaksoutfrombetweenthevalveplate/cylinderbarrelandwill____1612．船舶舵机系统中使用轴向变量柱塞泵。在压力下，液压油持续地从阀片和套筒之间漏出，如果不连续地把泵壳中的油

排掉，将会对油泵产生损坏。A.causelossofhydraulicoilfromthesystemB.resultinextremedamagetothepumpC.causedamagetothepumpifnotcontinuallydrainedfro

mthepumpcasingD.resultinthesystemhighsidepressuretosubstantiallydropoff1611C1612C1613Acentrifugalpumpvibrat

esexcessivelyduringoperation.Upondisassemblingthepumpitisfoundthattheimpellerisoutofbalance.Withoutanavaila

blespare,youshould____1613．离心泵工作时，发现振动很大。拆卸泵时，发现叶轮不平衡。如果没有备用叶轮，可以通过机加工的方法去除较重一侧的金属。A.drillholesthroughtheheavysideoftheimpelleruntili

tbalancesB.weldcounterweightstothelightsideoftheimpellerC.removemetalfromtheheavysidebymachininginalatheD.acidwash

andscrapetheheavysideuntilitbalances1614Moistureisremovedfromarefrigerationsystemby____1614。制冷系统中的水分通过除湿器来去除。A.bleedingrefr

igerantfromthecondenserB.openingadrainpetcockontheoilseparatorC.condensingthewaterintheheatexchangerD.usingadehydratorcart

ridge1613C1614D1615Whywillatwostageflashtypedistillingplanttendtooperatemoreefficientlywhenoperatingincoldseawater?1615．当海水温度较低时，两级闪发式造水机

的效率较高，因为闪发式的真空度提高了A.Thecolderseawaterpassingthroughthecondnsertubebundlesofthevariousstagesincreasesevaporatorvacuum.B.Theamountofheatedfeed

waterdischargedfromthefeedwaterheateraftercondenserisincreased.C.Fewernon-condensablegasesarecreatedbytheflowofcol

derseawater.D.Moreseawaterisallowedtopassthroughthefirststageoverflowweir.1616Moistureintherefrigerantmay____1616、制冷系统中的水分会在膨胀阀座结冰，

并会减少制冷剂的流量。A.freezeontheexpansionvalveseatandreducetheflowofliquidrefrigerantB.emulsifytheoilinthecondenserC.freezeinthekingvalveD.clogth

eoiltrap1617Thetendencyofaflammableliquidtovaporizeisindicatedbyits____1617．可燃液体的蒸发趋势可以用闪点来表示A.ignitionte

mperatureB.flashpointC.flammablerangeD.convectionindex1615A1616A1617B1618Whenthepropellerbladesareintegralwiththehub,t

hepropelleriscalleda____1618．当螺旋桨的桨口子与桨毂是整体式时，这种螺旋桨称为整体式螺旋桨。A.builtuppropellerB.solidpropellerC.controllablepitchpropellerD.suctionbackpr

opeller1619Moistureinarefrigerationsystemcancause____1619．制冷系统中的水分会造成膨胀阀结冰，系统管系腐蚀并使温度调节不正常。A.freezingtheexpansionvalveclosedB.corrosionofsystem

pipingC.impropertemperatureregulationD.alloftheabove1620Whichoftheproblemslistedcouldbeindicatedifasightglassintherefrigeran

tliquidlineisfullofbubbles?1620．如果制冷剂液态管路中的示液镜充满气泡，可能表明制冷剂不足。A.Properrefrigerantcharge.B.Faultyexpansionvalve.C.Insufficientr

efrigerant.D.Solenoidvalvestuckopen.1621Whichofthefollowingstatementsdescribesthefunctionsofareservoirusedinahydraulicsystem?1621．液压系统中使用贮

油器，其作用有散发热量、去除外界杂质和分离空气等A.Dissipateheat.B.Trapforeignmatter.C.Separateairfromtheoil.D.Alloftheabove.1618B1619D1620C1621D1622Comparedtoaconst

antpitchpropeller,acontrollablepitchpropeller____1622．与定距桨相比，调距桨更能有效地使用发动机的功率。意即不论船舶在任何工况下，调距桨均能给予主机发出全部功率的能力。A.moree

fficientlyusesavailableenginepowerB.operatesatalowerefficiencyatafixedspeedC.producesthesametorqueatlowerenginepowerD.develo

psitsratedpoweratalowerspeed1623Aliquidindicatorsightglassisusefulindeterminingwhetherornotarefrigerationsystemissuff

icientlycharged.Itisgenerallylocatedinthe____1623，制冷系统示液镜位于高压液态管路。A.highpressureliquidlineB.lowpressureliquidlineC.highpressurevaporlineD.

lowpressurevaporline1624Onedistinctadvantageofflashtypeevaporators,ascomparedtomostotherevaporators,isthatinaflashe

vaporator____1624．与普通造水机相比，闪发式造水机最明显的优点是结垢问题大为减轻。A.hightemperaturedistillatecanbere-circulatedtoinduceadditionalflashingB.scaleform

ationisnotasevereproblemC.coldshockingismoreeffectiveinremovingscaleD.waterpurityisgreatlyincreasedathighcapacity1622A1623A1624B1625Dualelect

ro-hydraulicsteeringunitsusuallyoperate____1625．电动液压舵机工作时，有一台泵处于备用状态。A.withbothpumpsonlineatthesametimeB.withonepumponstandbyC.withthefollow-upgear

disconnectedD.onlywhentheredderismovedamidships1626Ifaliquidsightflowindicatorinarefrigerationsystemshowsgasbubblesinmotionpass

inginsideoftheglass,thereis____1626．如果制冷剂液态管路中的示液镜充满气泡，可能表明制冷剂不足。A.toomuchrefrigerantinthesystemB.oilentrainedinth

erefrigerantC.lessthanafullchargeofrefrigerantinthesystemD.icecrystalsformingintherefrigerant1625B1626C16

27Thebilgesystemhasbeenperformingwell;however,theaftst~engineroombilge-wellsuddenlyfailstobepumpedout.Whichofthefollow

ingshouldbedonefirsttodeter-minethecause?16281627．舱底水系统工作正常，但是右舷尾部污水井突然不能泵出。在查找原因前，首先应试图泵另一个污水井来判断是否整个系统受到影响。1629A.Ope

nthebilgepumpforinspection1630B.Removeeachofthemanifoldvalves.1631C.Removeonlythemanifoldvalvetotheaffectedbilge-well.1632D.Attemptt

opumpoutanotherbilgewelltodetermineiftheentiresystemisaffected.16331628Ifonehydraulicpumpofanelectro-hydraulics

teeringunitfails,thevessel'ssteeringcanbeinitiallyandbestmaintainedbyusingthe____16341628．电动液压舵机的一台液压泵发生故障，可以通过使用备用泵使舵机系统保持正常运转。1635A.tri

ckwheelB.accumulatorC.standbypumpD.telemotor16361629Asightglassisinstalledintheliquidlinetoindicatetheconditionoftherefrigerantchargea

ndmayalsoindicatethe____16371629．制冷系统液态管路中的示液镜可用来表示制冷剂的充注状况，也可用来显示系统中足否有水分。1638A.conditionoftheexpansionvalveB.moistureinthesystem1639

C.conditionofthecompressorsuctionvalves1640D.condensertemperature16411627D1628C1629B1630Whichofthefilter

/strainerunitslistedpermitsyoutocleanthedementwhileleavingthesystemontheline?1630．双联式滤器能在脱离管路情况下清洗滤器芯件。A.SimplexB.DuplexC.CanisterD.Bypass1631

Aliquidsightflowindicatorinarefrigerationsystemisexaminedandgasbubblesarenotedinmotionwiththefluidflow.Thismeans____1

631．如果制冷剂液态管路中的示液镜充满气泡，可能表明制冷剂不足。A.thesystemisfullychargedB.thereisairleakinginfromthecondenserC.icecrystalsareformingi

ntherefrigerantD.thesystemcontainslessthanafullchargeofrefrigerant1632Lessscaleformationoccursinaflashevaporatorthaninasubmergedt

ubeevaporatorbecause____1632．闪发式造水机最明显的优点是结垢问题入为减轻，因为在热交换面上没有发生沸腾现象。A.thedistillateproducedhasgreaterpurityB.noboilin

goccursonheattransfersurfacesC.evaporationoccursatahigherrateD.theincomingfeedisatahighertemperature1630B1631D1632B1633Vesselpropellers

areclassifiedasbeingrighthandorlefthand.Arighthandpropellerturnsclockwisewhenviewedfrom____l633．从船尾方向看，正转时顺时针旋转的螺旋桨，称为右

旋桨。A.thebowB.thesternC.theportsideD.thestarboardside1634Theprimaryreasonlowpressureevaporatorsproducedistillatemo

reefficiently,andwithlessscaleformation,thanhighpressureevaporatorsis____低压造水机与高压造水机相比，效率高而且水垢形成少。其主要原因是蒸发是在真空进行的。A.e

vaporationisaccomplishedinavacuumB.duetothehighertemperatureoftheincomingfeedC.duetothelatentheatofevaporationprincipleD.evaporationi

nasubmergedmediumproducesmoredistillate1633B1634A1635Iftherefrigerationcompressorcrankcaseissweating,thecausemaybedueto____1635．如果制冷压缩机曲

柄箱冒汗，原因可能是液态制冷剂返回到压缩机。A.ashortageofrefrigerantB.thecompressorrunningcontinuouslyC.liquidrefrigerantreturningtothecompresso

rD.thecompressorshortcyclingonthehighpressurecutout1636Whennormaloperatingpressureisappliedtothehydrau

licoilusedinahigh-pressuresystem,theoil____1636．当正常的工作压力作用于高压系统中的液压油时，油的体积将减少。A.viscositywilldecreaseB.volumewillincreaseC.volumewill

decreaseD.pourpointwillbereduced1637Mostsolenoidvalvesareactuatedby____1637．绝大多数电磁阀是受电磁铁的作用来工作的。A.aspringB.anelectro

magnetC.theforceofgravityD.refrigerantpressure1635C1636C1637B1638Increasedinternalleakage,inadditiontopo

orhydraulicsystemresponse,andinadequatelubrication,istheresultof____1638．液压系统反应慢、润滑不良，而且内部泄漏大，往往是由于液压油的粘度低引起。A.pump

bearingsinpoorconditionB.excessivelywornactuator-pistonpackingC.brokendirectionalcontrolvalvecenteringspringsD.lowhydraulicoilvis

cosity1639Thestructuralmembersofthehullextendinginaforeandaftdirectionarecalled____1639．沿船舶首尾方向布置的结构件，称为纵梁。A.framesB.joine

rsC.longitudinalsD.knees1640Whenthereisnomovementoftheramsonanelectro-hydraulicsteeringgear,thetiltingboxoftherunningpumpis

____1640．当电动液压舵机的撞杆不运动时，油泵的倾斜盘处在中央位置。A.setformaximumtorqueB.onthepurgeandventstrokeC.intheneutralpositionD.rotatingbackwards1641Whichcharact

eristicorconditionwillhavethegreatesteffectonincreasingahydraulicoil'sviscosity?1641．压力将会引起液压油的粘度增大。A.PourpointB.CloudpointC.VacuumD.P

ressure1638D1639C1640C1641D1642Rotationofthesteeringwheelonthenavigationbridgeinitiatesoilpressurebeingappliedtoth

esteeringgearramsby____1642．驾驶台舵轮转动，将改变倾斜盘的角度或浮环的偏心距，使得油压作用在舵机的撞杆上。A.regulatingtheoilflowwiththesix-wayvalveB.movingtheautomaticdifferentialv

alveC.movingthereceivingtele-motorwhichregulatesthetwo-wayvalveD.varyingtheangleofatiltingboxoreccentricityofafloatingring1643Aknock

ingsoundfromonecylinderofanoperatingaircompressorindicates____1643．空气压缩机运转时，一个气缸发生敲缸，原因是阀片松动。A.adefectiveorbrokenhighpressureun

-loaderB.aloosevalveplateC.excessiveoverloadD.nocompression1644Sluggishresponseoractionofthehydraulicactuatorsmaybearesultof____1644．液压

油粘度过高会引起系统反应迟钝。A.insufficientloadB.excessivelyhighoilviscosityC.relief-valvepressuresettingtoohighD.reservoirlevelbeingmaintainedtwoinchesabo

venormal1642D1643B1644B1645Aswingcheckvalveisusedinapipelineto____1645．管系中单向阀只允许流体以一个方向流动。A.maintainapresetp

ressureonthelineB.closelyregulatetheamountofflowC.relieveexcessivepressureonthelineD.allowflowinonedirectiononly1646Whenthedesiredrudderanglei

sattainedbyatypicaldoubleramelectro-hydraulicsteeringgear,the____1646．对于两撞杆的液压舵机，当达到所需要的舵角时，追随机构将使油泵不产生吸排作用，A.ramreliefvalvesb

ypassoiltostopruddermovementB.six-wayvalveshiftstotheneutralflowpositionC.steeringpumpelectricmotorisde-energizedbythetransfersw

itchD.follow-upgeartakesthehydraulicpumpoffstroke1647Arefrigerationsystemcompressorcrankcaseissweatingorunusually

cold.Thisisanindicationof____1647．如果制冷压缩机曲柄箱冒汗，原因可能是液态制冷剂积聚在曲柄箱。A.ashortageofrefrigerantinthesystemB.airinthesystemC.anaccumulationofliquidrefriger

antinthecrankcase.D.ashortageofoilinthecrankcase1645D1646D1647C1648Operatingarotarypumpatspeedsinexcessofdesignrequirementscould

cause____1648．旋涡泵超速运转，会引起剥蚀和过度磨损。A.decreasedclearancesbetweenrotatingpartsB.decreasedslippagetothesuction

sideofthepumpC.airbindinginthedischargeportsD.erosionandexcessivewear1649Refrigerationsystemcompresso

rcrankcasesweatingisanindicationof____1649。如果制冷压缩机曲柄箱冒汗，另一个原因可能是系统中循环的滑油过多。A.insufficientlubeoilcircula

tingthroughthesystemB.excessivecirculationoflubeoilthroughthesystemC.insufficientrefrigerantinthesystemD.anoverwor

kedcompressor1650Whichbearingwillcarrytheloadontwosmallpointsdiametricallyoppositetoeachother?1650．对于球轴承，负荷是由直径方向相对的两点来承受。A.NeedleB.

TaperedmilerC.RollerD.Ball1648D1649B1650D1651Sweatingoftherefrigerationsystemcompressorcrankcaseiscausedby____1651．如果制冷压缩机曲柄箱冒汗，原因可能是过多的制冷剂返回到压缩机。A.

toomuchsuperheatB.insufficientsuperheatC.suctionpressuretoolowD.excessiverefrigerantreturningtothecompressor1652A

nincreaseinrotorclearancesinarotarypumpwill____1652．旋涡泵转子间隙增大会引起泵排量减少。A.increasedischargepressureB.decreasepumpcapacityC.decreasepumpcav

itation,D.decreasereactionringclearance1653Theinternalforceofamaterial,whichtendstoresistdeformationwhens

ubjectedtoexternalforces,isknownas____1653．物质承受外力时，能抵抗变形的内力，称为“应力”。A.stressB.strainC.shearstrengthD.ultima

tetensilestrength1654Inanelectro-hydraulicsteeringsystem,reddermovementismaintainedinclosesynchronizationwiththe

steeringwheelpositionbymeansofthe____1654．在电动液压舵机系统中，通过追随控制，舵的运动与舵轮位置构成闭环。A.trick-wheelB.follow-upcontrolC.six-wayvalveD.Rapso

nslide1651D1652B1653A1654B1655Crankcasesweatinginarefrigerationsystemiscausedby____1655』口果制冷压缩机曲柄箱冒汗，另一个原因可能是系统中循环的滑油过多

。A.astucksolenoidvalveB.ashortageofrefrigerantC.toomuchoilincirculationD.toomuchsuperheat1656Ifarefrigerationsystemcompressorcrankcaseissw

eating,youshould____1656n果制冷压缩机曲柄箱冒汗，应调节热力膨胀阀到正常位置，A.addrefrigeranttothesystemB.adjustthethermalexpansionvalvetothe

propersettingC.adjustthefloatvalvetotheproperholdingpressureD.openthehandexpansionvalve1657AmultistagecentrifugalpumpcanbeBESTdescr

ibedashaving____1657．多级离心泵是指两个或多个口卜轮封闭在一个泵壳内并安装在一根轴上。A.twoormoreimpellershousedtogetherinonecasingandmountedonasingleshaftB.asing

lesteppedimpellermountedinaprogressivelystagedcasingC.alargeradialclearancebetweentheimpellerandcasingtopreventoverhe

atingduetofrictionD.anincreaseinthedischargevelocityoftheliquidwithacorrespondingdecreaseinpressurethroughthestages1655C1656B1657A1658Propel

lerpitchspeedminusshipspeeddividedbythepropellerpitchspeedistermed____1658．螺旋桨螺距的速度(船速)／螺旋桨螺距的速度，即“滑失比”。A.apparentslipB.trueslipC.pitchD.propulsivee

fficiency1659Whichofthedeviceslisted,whenusedonanelectro-hydraulicsteeringgear,keepsthemovementofthereddercloselyinste

pwiththesteeringwheel?1659．在电动液压舵机系统中，通过追随装置，舵的运动与舵轮位置保持同步。A.Thefollow-upgear.B.Theredderangleindicator.C.Thesynchronouselect

rictransmitter.D.Arudderanglelimitswitch.1660Thesensibleheatofairisdependentuponthe____1660．空气的显热取决于干球温度。A.drybulbtemperatureB.wetbulbtemper

atureC.saturationtemperatureD.watervaporsuperheat1658A1659A1660A1661Ifanaircompressorisusedtosupplycomp

ressedairtooutletsthroughouttheengineroomandondeckofavessel,thesystemisknownasthe____1661．如果空气压缩机用来向机舱内和甲板上的有关接口提

供压缩空气，该系统称为日用空气系统。A.combustioncontrolairsystemB.supplyairsystemC.ship'sserviceairsystemD.lowpressuredeckairsystem1662Whenitisnecessar

ytoopenarefrigerationsystemforrepairsandthesystemwillbeopenformorethanafewminutes,theopenendsofthesystemshouldbe____1662．如果要对制冷系统进行维修工作

，系统需要打开一段时间，系统的开口端应塞住。A.dehydratedB.purgedC.pluggedD.evacuated1663Ifanaircompressorisusedtosupplyairprimarilytothecombus

tioncontrolsystemandotherpneumaticcontrollers,theentiresystemisknownasthe1663．如果空气压缩机用来向燃烧控制系统和其他气动控制器提供压缩空气，该系统称为控制空气系统。A.controlairsys

temB.forceddraftairsystemC.supplyairsystemD.shipsserviceairsystem1661C1662C1663A1664Acrackeddiaphragminathermostati

cexpansionvalvewillcausethevalveto1665____1664．热力膨胀阀膜片损坏将引起膨胀阀关闭。A.returntoaneutralpositionB.floodtheevaporatorC.openD.close1665Inordertodist

ributethesidepressuresoverawideareaofthecylinderwallsandliners,whichofthelistedtypesofpistonsareusedinmodemlowpressureaircompressors?1665．

现代低压式空气压缩帆通常采用筒状活塞，将侧向压力分布在较大的气缸壁和气缸套面积上。A.DifferentialB.TrunkC.BarrelD.Valve-in-head1666Whichofthelis

tedoperatingconditionswouldhavethegreatesteffectonthevolumetricefficiencyofanoperatingreciprocatingaircompressor?1666．对于运转

中的往复式压缩机，头部垫片泄漏将对容积效率产生很大影响。A.Thedensityoftheairenteringthecompressor.B.ThetemperatureoftheairenteringthecompressorC.Thedesigned

rotatingspeedofthecompressor.D.Aleakingheadgasket.1664D1665B1666D1667Brokenvalvestripsinanoperatinglowpressure,aircompressorwillcause1668____1667．

空气压缩机阀片损坏将使排量下降。A.animmediatecrankcaseexplosionB.oilcontaminationinthecompressedairC.adecreaseincompressorcapacityD.noimmediatelos

softhecompressedaircapacity1668Whichoftheproblemslistedrepresentsthemajordifficultyencounteredwiththermalexpansionvalveoperation?1668．热力膨胀阀阀座和阀芯

积聚水分或杂质会对膨胀阀的工作造成影响。A.Lubeoilpassingthroughthesystem.B.Moistureorforeignmattercollectingatthevalveseatandorifice.C.Variablespringtensionc

ausedbythechangingtemperature.D.Frostontheliquidline.1667C1668B1669Aviscousfilmofoilcollectedbetweenthevalvefaceandse

atofalow1670pressurereciprocatingaircompressorwill____16711669．低压往复式空气压缩机，气阀面与阀座之间积聚油膜，将造成气阀开、关延迟。A.preventthevalvefromwiredra

wingB.retardtheopeningandclosingofthevalveC.havenoeffectoncompressoroperationD.providequietervalveoperation16

70Ifthepumpforahydraulicanchorwindlassisoverheating,thecausemaybe____1670．如果液压锚机的油泵过热，原因可能是油泵排出压力过高。A.increasedpumpspeedB.excessivepumpdisc

hargepressureC.toolowofatiltingboxangleD.lowpumpspeed1669B1670B1671Ifarefrigerationcompressorwereshortcyclingonthelo

wpressure1672cutoutswitch,theprobablecauseforthismightbethe____1671．膨胀阀滤器污垢，会引起低压控制器频繁动作，造成压缩机起、停频繁。A.systemwasoverchargedwithrefrigerantB.

highpressureswitchwasimproperlyadjustedC.expansionvalvestrainerswerefouledD.suctionvalveswereleakingslightly167

2Thepartoftheanchorwindlassthatengagestheanchorchainforliftingiscalledthe____1672．锚机装置中，锚链轮用来啮合锚链，实现锚的起降。A.warpingheadB.fairleadC.wildcatD.capstan16

73Airblowingfromtheintakeairfilterofanoperatingaircompressorindicates____1673．空气压缩机进气滤器有空气吹出，则表明进气阀损坏A.bro

keninletvalvesB.brokendischargevalvesC.pulsationsintheairdistributionsystemD.overloadingoftheairdistributionsystem1671C1672

C1673A1674ffarefrigerationcrankcasecompressorwereshortcyclingonthelow1675pressurecutoutswitch,thecausemightbethatt

he____16761674．低压控制器频繁动作，造成压缩机起)，停频繁，原因可能是系统中制冷剂不足。A.systemwasoverchargedwithrefrigerantB.system'waslowonrefrig

erantC.suctionvalveswereleakingslightlyD.reliefvalvewasleakingslightly1675Whichofthefollowingproblemswould

betheprobablecauseforthefaultyoperationofareciprocatingaircompressorsuctionvalve?1675．对于往复式空气压缩机，气缸卸载装置

运行不正常会使其吸气阀工作不正常。A.Carbonbuildupinthepistonringbelt.B.Faultyoperationofacylinderun-loader.C.Compressorop

erationinanareaofhighrelativehumidity.D.Liftingofintercoolerreliefvalve.1674B1675B1676Inwhichofthelistedhydraulicsystemswilltheinstal

lationofanoil1677coolerbenecessary?1676．绞缆机液压系统中必须安装油冷器。A.Constanttensionmooringwinchsystem.B.Hatchcoversystem.C.Wat

ertightdoorsystem.D.Internalcombustionenginehydraulicstartersystem.1677Whichofthefollowingproblemscouldcauseairtoblowoutthrough

theinletairfilterofarunningcompressor?1677．见第1673题。A.Excessivecompressioninthecylinder.B.Abrokenintakevalve.C.Adirtyinletfilterelement.D.Animprope

rlyadjusteddischargevalve.1678Arefrigerationunitwilltendtoshortcyclewhenoperating____16791678．制冷装置在低负荷运转时，容易产生压缩机起、停频繁。A.under

heavyloadsB.duringhotgasdefrostC.underlightloadsD.duringstartingconditions1676A1677B1678C1679Avacuumisinitiallycreatedinaflashtypedistillingplantb

y____1679．在闪发式造水机中，真空是由喷射器或独立的真空泵产生的。A.theflashingofthefeedwaterB.thecondensationofthesaltwaterfeedC.ai

rejectors,eductors,oraseparatevacuumpumpD.condensationofthedistillate1680Whatcolorisusedtoindicatethelastshotofan

chorchain?1680．锚链的最后一节是用红色来表示。A.RedB.WhiteC.BlueD.Yellow1681Whichofthefollowingproblemscanresultinbelownormalpressureinthe1

682intercoolerofanoperatinglowpressureaircompressor?1681．低压空气压缩机运行时，低压气缸的排出阀泄漏会使中冷器压力偏低。A.Defectivepressurepilotvalve.B

.Defectivereceiverreliefvalve.C.Leakingintakevalvesonthehighpressurecylinder.D.Leakingdischargevalves

onthelowpressurecylinder1679C1680A1681D1682Ifarefrigerationcompressorisshortcyclingonhighheadpressure,youshould1683____168

41682．由于排压过高而使制冷压缩机起停频繁，应注意检查冷凝器是否有足够水流。1685A.purgethecondenserifthewatersideisdirtyB.checkforproperwater

flowthroughthecondenserC.increasethehighpressurecutoutsettingD.reducethecoolingwaterflow1683Mostpumpmanufacturersrecommendedthatthedischargepi

pingforcentrifugalpumpsbe____16841683．绝大多数泵浦制造商建议离心泵排出管的尺寸应比泵的排液喷嘴的尺寸大。1.A.onesizelargerthanthepumpdischargenozzleB.thesa

mesizeasthepumpdischargenozzleC.onesizesmallerthanthepumpdischargenozzleD.installedwithashortradiuselbowatthepump1684Excessivelylowairpressu

reoccurringintheintercoolerofareciprocatingaircompressoriscausedby____1.1684．往复式空气压缩机的中冷器空气压力过低，通常是由于低压气缸的排出阀漏气引起．A.leakydischargevalveson

theLPcylinderB.leakydischargevalvesontheHPcylinderC.insufficientintercoolercoolingD.lowambientairpressure1682B1683A1684A1685Therefrigerationcompresso

rinawatercooledrefrigerationsystemisshortcycling1686onthehighpressurecutoutswitch.Onereasonforthiscouldbethe____1685．水冷式制冷

系统中，制冷压缩机由于高压继电器频繁动作而使压缩机起、停频繁，其中一个可能原因是高压继电器没有正确调节。A.systemislowonrefrigerantB.highpressurecutoutswitchisim

properlyadjustedC.dischargevalvesareleakingslightlyD.dischargevalvesareleakingexcessively1686Intheoperationofaflashtypeevaporatorequippedwithai

rejectors,theairandnon-condensablegasesareevacuateddirectlyfromthe____1686．在装有空气喷射器的闪发式造水机中，空气和不凝性气体直接是从第二级冷凝器中排出A.firststageflashchamberB.s

econdstageflashchamberC.firststageaftercondenserD.secondstagedistillingcondenser1687Mostpumpmanufacturersrecomme

ndthatthesuctionpipingdimensionforcentrifugalpumpsbe____1687．绝大多数泵浦制造商建议离心泵吸人管的尺寸应比泵的吸液喷嘴的尺寸大。A.onesizesmallerthanthepumpsuctionnozzleB.th

esamesizeasthepumpsuctionnozzleC.onesizelargerthanthepumpsuctionnozzleD.installedwithashortradiuselbowatthepump1685B1686D1687C1688Whichofth

efollowingstatementsaboutpumpoperationsisNOTacorrect1689statement?1688．“物质温度低才能泵送”这一说法显然不正确。A.Inorderforafluidtobepumped,aflu

idmustbemadetoflow.B.Asubstancemustbecoldinorderforittobepumped.C.Thekineticenergyimpartedbythepumpcanbeusedtofor

cealiquidthroughahydraulicsystem.D.Apumpmustreceiveitsenergyfromanexternalsource.1689Whichofthefollowingprecautionsshouldalway

sbecarriedoutindrydock?1689．船舶坞修时的预防措施包括：液舱之间不得随意泵送；如果已拆卸海底阀门，当船舶重新浮起时应注意检查海底阀门的圆冒是否漏水；在船舶重新浮起前，应确保海底阀箱的滤器已更换等。’A.Liquidsshouldneverbet

ransferredbetweentankswithoutconsultingthedockmaster.B.Ifseavalveshavebeendisassembled,allbonnetsmustbechec

kedforleakagewhentheshipisre-floated.allseacheststrainersshouldbeverifiedashavingbeenreplaced.C.Befor

ere-floating,D.Alloftheabove.1688B1689D1690Ifanelectricmotordrivenaircompressorfailstostart,itmaybeduetoa

____1690．如果电动机驱动的空压机不能启动，可能原因是过载继电器已跳闸。A.leakingdischargevalveB.jammedsuctionvalveC.trippedoverloadrelayD.brokendischarge

un-loader1691Machinerydrivingfueloiltransferandfueloilservicepumpsmustbe1692fittedwitharemotemeansofstoppingthema

chineryfrom____1691．燃油驳运泵和日用泵的驱动机械应具有遥控的速停装置。1.A.withinthespaceconcernedB.outsidethespaceconcernedC.thethrot

tlestationD.withinthefireroom1692Anaircompressorcanbeunloadedatstart-upby____1692．空气压缩机启动时可通过释放中冷器的压力到大气来实现卸载。A.holdingthedischargevalveopenB.reliev

ingtheintercoolerpressuretotheatmosphereC.usinganenlarged,permanentlyopenedclearanceexpansionspaceD.apre-chargedaccumulator1690C1691B1692

B1693Withregardstofluidflowcontrol,anadvantageofpneumaticcontrol1694systemsoverelectricalcontrolsystemsis_

___1693．从流量控制的角度看，气动控制比电动控制具有优点。这主要表现在它能在临时的断电情况下还能实现控制。A.practicallynolimittothepoweravailableforagivensystemB.n

otransmissionlossesC.lowenergyinputD.continuedcontrolthroughtemporaryelectricalpowerlosses1694Flexiblehoseunderpr

essureinahydraulicsystemwill____1694．液压系统中柔性软管在压力下，将轴向收缩、径向膨胀。A.tendtotwistaboutitslongaxisB.expandinlengthandindiameterC.contractinlengthandexpand

indiameterD.flexatrightanglestotheappliedpressure1695Whichofthefollowingstatementsdescribestherelationshipbet

weenflashpointandignitiontemperature?1695．着火点总是比闪点高：A.Botharehigherthannormalburningtemperatures.B.Theflashp

ointisalwayshigher.C.Theignitiontemperatureisalwayshigher.D.Theyarenotnecessarilyrelated.1693D1694C1695C1696ffarefri

gerationcompressorwillnotstart,thereasonmaybe____1696．制冷系统中制冷剂尸‘重不足，会引起制冷压缩机不能启动。A.thepressureregulatingv

alveisnotclosingB.anexcessivelackofrefrigerantinthesystemC.badlyleakingdischargevalvesD.wornpistonrings1697Thelowesttemperaturerequiredtocauseser

f-sustainedcombustionofasubstance1698independentofanyoutsidesourceofignitioniscalled____1697．刁；受外界火源影响，引起

物质能持续燃烧的最低温度，称为“着火点”。A.explosiverangeB.flashpointC.ignitiontemperatureD.combustiontemperature1698Thepurposeofthew

earingringsusedinacentrifugalpumpisto____1698．离心泵中使用的承磨环用来承受叶轮与泵壳之间的摩擦。A.preventaninternalexplosionint

hepumpwhenitisoverheatedB.enableavisualinspectionofthepumpwhileitisrunningC.insureaproperalignmentofthepumpcouplingtothedriverD.accommodateforfric

tionbetweentheimpellerandthecasing1696B1697C1698D1699Whenarefrigerationcompressormotorfailstostart,theFIRSTthingthat1700s

houldbecheckedforisa____1699．制冷压缩机的电动机不能启动时，首先应检查电路中熔断丝是否熔化。A.looseexpansionvalvecontrolbulbB.lowdifferentialsettin

gontheH.P.cutoutC.blownfuseinthemotorcircuitD.faultysuctionpressureregulator1700Aircompressorsareequippedwithunloadingsystemsforthepurposeof____1700．

空气压缩机装有卸载装置，用来卸走启动时除了摩擦负荷外的所有负载。A.removingallbutthefrictionalloadduringstartingB.relievingintercoolersofhightemperaturebuildupsC.provid

inghighstartingtorqueinthedrivemotorD.seatingvalveplatesduringcompressorshutdown1699C1700A1701Thesimplestmethodtousefordeterminingifa

centrifugalpumpis1702operatingasdesigned,isto____1701．判断离心泵是否按设计状态运行，最简单的方法是关闭排出阀，观察压力的升高情况。A.closelyobservethepumpdischargetemperatureB.c

loseoffthedischargevalve,andwatchforariseinpressureC.momentarilycloseoffthesuctionvalve,andwatchforariseinpressureD.useaclamponammeterandcomp

ressthereadingtopastrecords1702Whichofthefollowingstatementsconcerningbutterflyvalvesiscorrect?1702．对于蝶阀，只

要转动手柄1／4转，就能关闭阀门。A.Specialtoolsarerequiredforlappingorgrinding.B.Itisimpossibletothrottleflowwithabutterflyvalve.C.Toclosethevalve,itison

lynecessarytoturnthehandleaquarterofaturn.D.Thebutterflyvalveshouldneverbeusedinafreshwatersystem.1701B1702C1703Ifalargedifferenceexist

sbetweenthecompressordischargepressureandthepressurecorrespondingtotheexistingcondensingtemperatureinarefrigerationsystem,youshould____

17041703．制冷系统中，如果压缩机的排压与冷凝温度对应的冷凝压力存在很大的压差，应释放不凝性气体以减少过高的压力。1705A.increasetheflowofthecoolingwaterthro

ughthecondense1706B.adjustthehighpressurecutouttomaintainthedesiredpressure1707C.openthehotgasbypasstemporarilytoreducecapacity1708D

.purgenon-condensablegasestoreducetheexcesspressure17091704Pressureinanoperatinghydraulicsystemisdev

eloped____17101704．液压系统工作时的压力是由流体通过系统时的阻力产生的。1711A.onlybythepumpasitsprimaryfunction1712B.byresistancetothefluidflowt

hroughthesystem1713C.bythethermalinputtothesystem'sfluid1714D.solelybythechargeappliedbytheaccumulators17151703D1704B1705Theaccumulat

ionofairandothernon-condensablegasesinarefrigerationsystemwill____1705．制冷系统中空气和不凝性气体总是积聚在冷凝器的上半部分。A.causealo

ssoftheliquidsealB.createavaporlockintheliquidreceiverC.collectinthecondenserD.causefoamingoftheoilinthecrankcase1706Whichpump

installationwouldrequireanexternalsourceofsealingwater?1706．舱底离心式污水泵需要灌注外界的液封水。A.Maincirculatorpumpjacketwatercooling.

B.Saltwaterservicepump.C.Auxiliarycondensatepump.D.Bilgepump.1707Alubeoilfiltercanbeusedtoremovemostcontaminantsfromlubeoil.Acontaminant

whichwillremaininthelubeoilafterfilteringis____1707．滑油滤器能去除滑油中绝大多数污染物。滑油经过净化后仍残留的污染物是燃油。因为酸性物质被滑油中的添加剂中和；沉淀物和水都能在滤器或分油机中被分离。

A.acidB.fueloilC.sedimentD.water1708Wheninstallingahydraulichose,whichofthefollowingprecautionsshouldbetaken?1708．安装液压软管时，软管不能被扭曲；如果软管

承受挤压力，应装套管；软管应有松弛部分(不能拉得太紧)。A.Thehoseshouldnotbetwisted.B.Thehoseshouldbeprotectedwithasleeveifitissubjectedtorubbing.C.Thereshouldbesomeslackintheho

se.D.Alloftheabove.1705C1706D1707B1708D1709Airenteringanair-cooledrefrigerationsystemisindicatedby____1709．空冷式制冷系统，如果空气进入到系统，压缩机的排压会偏高。

A.frostingoftheliquidlineB.higherthannormalheadpressureC.aclearsightglassD.abnormallycoldreeferboxes1710Thepresenceofbubblesi

narefrigerationsystemliquidlinemay____1710．制冷系统液相管存在气泡，会携带水分并导致腐蚀。A.promoterefrigerantdehydrationB.beabsorbedinther

eceiverC.causelowcondensingpressureD.carrymoistureandleadtocorrosion1709B1710D1711Dirtshouldnotbeallowedtocontaminateagr

easelubricantbecause1712the____..1711。脏物与油脂混合后，会产生很大的磨损作用，因此应防止油脂被脏物污染。A.dirtwillcausecorrosionofbearingB.bearingswil

lleakoilexcessivelyC.dirtisveryabrasivewhenmixedwithgreaseD.greasewillbecomeinflammable1712Thefunctionofacentrifugalpumpdoublevoluteca

singisto____1712．离心泵采用双涡壳，其目的是为了减少对叶轮的径向力。A.reduceradialthrusttotheimpellerB.doubletheliquidvelocitythroughthepumpwhencomparedtoasinglevol

uteC.reducehydraulicendthrustD.providetheeffectofmulti-staging1713Differentialpressurescanbemeasuredwiththeuseofa____1713．膜片式压力表、压力

传感器和压气计都可测量压差。A.diaphragmtypegageB.pressuretransducerC.manometerD.Alloftheabove1711C1712A1713D1714Whichofthelistedstat

ementsisacharacteristicoftheliquidchargedpower1715elementusedwiththermostaticexpansionvalves?1714．热力膨胀阀在正常工作时，其感温包不可能没有液态制冷剂。A

.Atthedesignedoperatingtemperature,theliquidrefrigerantchargehaschangedtoavapor.B.Theliquidrefrigeranttendstocollectatthebellowsordi

aphragmandreducesthevalvesensitivity.C.Thesensingbulbisemptyofliquidrefrigerantchargeatthedesignedoperati

ngtemperature.D.Thesensingbulbisneveremptiedofliquidrefrigerantundernormaloperatingconditions.1715Thevalvebestsuitedforthrottlinggasorliquidflo

winapipelineisthe____1715．最适于调节气体或液体流量的阀是球阀。A.gatevalveB.globevalveC.checkvalveD.plugcock1714D1715B1716Inordertoproperlyremoveairfromthecasi

ngofacentrifugalpumpwhen1717starting,thepumpshouldhavea____1716．为了在启动时去除离心泵泵壳中的空气，应在涡壳顶部的泵壳上安装透气阀。A.positiveheadB.negativesuctionhead

C.mechanicalsealD.ventvalveattachedtothecasingatthetopofthevolute1717Scaleaccumulationonevaporatorheatexchang

esurfaces____1717。造水机热交换表面上的水垢会减少热量传递。A.increasesbrinedensityB.increasesdistillatesalinityC.reducesmetalcorrosionD.reducesheattransfer1718Exces

sivecirculationofthelubricatingoilwiththerefrigerantinarefrigerationsystemwillcause____1718．制冷系统中，过多的滑油随制冷剂循环，会引起蒸发温度升高。A.carbondepos

itsonthecompressorsuctionvalvesB.theevaporatortemperaturetoincreaseC.rapidcorrosionofthethermalexpansionvalveD.noopera

tingproblems1716D1717D1718B1719Whichofthefollowingcentrifugalpumpcomponentsconvertstheliquid1720kineticenergyofve

locitytothepotentialenergyofpressure?1719．离心泵的涡壳将液体的动能转化为压力能。A.ImpellerB.ElectricmotorC.VoluteD.Eye1720Sludgemayforminthecrankcaseofanairc

onditioningcompressorasaresultof____1720．由于过热和氧化，空调压缩机的曲柄箱会产生沉淀物。A.bubblingrefrigerantB.overheatingand

oxidationC.loweredoperatingtemperaturesD.reducingthecloudorflashpoint1721Whichofthefollowingstatementsisc

orrectconcerningthe"flashpoint"ofaliquid?1721．闪点总是比着火点低。A.Itislowerthantheignitiontemperature.B.Itisthetemperatureatwhichasubstancewillsponta

neouslyignite.C.Itisthetemperatureatwhichasubstance,whenignited,willcontinuetobum.D.Itisthetemperatureatwhichthereleasedvapor

swillfallwithintheexplosiverange.1722Ifyourvesselbums8tonsoffuelperhourat15knots,howmanytonsperhourwillitbumat18knots?1722．M2=(Ｖ2／Ｖ１)３’Ｍl=(18／１5)３X8＝

13．82(t)。A.13.82tonsB.15.61tonsC.16.00tonsD.16.37tons1719C1720B1721A1722A1723Thepercentageofimpuritiesinasp

ecificfueloilsampleisdeterminedby____1723．对于给定的燃油油样，杂质的百分比是在实验室的分油机中测定的。A.settlinginafueltankB.testi

nginalaboratorycentrifugeC.burninginacalorimeterD.testinginaclosedcup1724WhichofthelistedcharacteristicscanbeappliedtoR-12vapor?1724．R12蒸汽是无色无味的。

A.Itiscorrosive.B.Itisodorless.C.Itisvisibleasabluefog.D.Ithasadistinctivetaste.1725Foamingoftheoilinarefrigerationcompressorcrankc

aseiscausedby____1725．制冷压缩机曲柄箱油泡沫是由制冷剂从滑油中蒸发出来所引起。A.refrigerantboilingoutofsolutionfromthelubeoilB.liquidrefrigerantfloodingthecompressorandsystemC.l

ubeoilviscositybeingreducedbyrefrigerantdilutionD.compressorsuctionpressuresuddenlyincreasing1726Exces

sivescaleformationinadistillingplantmayresultfrom____1726。造水机真空度调节不当，会引起蒸馏装置结垢严重。A.poordistillatequalityB.reducedevaporatorcapa

cityC.lowbrineconcentrationD.impropervacuumregulation1723B1724B1725A1726D1727Inarefrigerationsystem,foamingofthecrankcaseoilmaycausethe____1727．制冷压缩

机曲柄箱油泡沫会引起压缩机敲缸。A.expansionvalvetooverfeedB.compressortoknockC.waterregulatingvalvetofailD.crankcasedrainstoplug17

28Thecentrifugalpumpcomponentresponsibleforconvertingthemechanicalenergyoftheliquidbeingpumped,tothatofkin

eticenergyisthe____1728．离心泵的叶轮将液体的机械能转化为动能，A.electricmotorB.voluteC.impellerD.diffusionnozzle1729Excessiveoilfoaminginthecrank

caseofarefrigerationcompressorcanresultin____1729．制冷压缩机曲柄箱油泡沫过多会引起压缩机轴承过热(；A.overheatedcompressorbeatingsB.excesslube

oilviscosityC.excessdepositsonthecompressorpistonringsD.waxcrystalsforminginthelubricant1730Thebasicfunctionofthecentrifugalpumpim

pelleristo____1730．离心泵叶轮的作用是直接提高液体的速度。A.directlyincreasethepressureoftheliquidbeing,pumpedB.directlyincreasethev

elocityoftheliquidbeingpumpedC.convertthepotentialenergyoftheliquidtokineticenergyD.separateairfromtheliquidbeingpumped1727B1728C1729A17

30B1731Whichofthefollowingstatementsiscorrectconcerningatypicalshipboardmulti-coil1732refrigerationsystem?1731．制冷系统中，蒸发器中的制冷剂温度直接与制冷剂的压力有关

。A.Theliquidreceiverfunctionstocollectandremovenon-condensablegases.B.Athermostaticexpansionvalveisusedtocontrolrefr

igeratedspacetemperature.C.Refrigeranttemperatureinanevaporatorisdirectlyrelatedtorefrigerantpressure.D.Dehydratorsmustbeusedconti

nuouslyinarefrigerationsystem.1732Oneoftheconsequencesincontinuingtooperateacentrifugalbilgepumpwiththedischargevalveclose

d,isthatthe____1732．离心式舱底水泵，在排出阀关闭的情况下持续运转，会引起泵过热。A.motoroverloadwillopenB.reliefvalvewillopenC.pumpwilloverheatD.motorwilloverheat1733

Thesuddenreductionofpressureoccurringwithinthecrankcaseofarefrigerationcompressorduringstartingcausesthe__

__1733．制冷压缩机启动期间，曲柄箱压力突然下降，会引起制冷剂从混合物中蒸发出来A.suddenevaporationofwaxcrystalsinthelubricantB.suddenevap

orationofentrappedairinthelubricantC.releaseofrefrigerantfromtheoil/refrigerantmixtureD.releaseofdissolvedlubricantfromtherefrigerant1731C1732C1733C1

734Ifanoperatingbilgepumpisdevelopinggoodvacuum,butisunabletodischargeanywater,whichofthefollowingproblemsisthemostprobablecause

?17351734、如果舱底水泵建立起良好的真空度，但不能正常泵水，可能原因是吸口滤器堵塞。1736A.Thewearingtingsareexcessivelyworn.1737B.Thesuctionstrainerisclog

ged.1738C.Thedischargevalveisclogged.1739D.Theshaftisworn.1735Acentrifugalpumpproducesflowwitharesultingdisch

argeheadbyenergyconversion.Itistypicalfortheenergyconversiontofollowtheorderof____1.1735．离心泵中能量转换顺序是：机械能到动能再到势能(压力能)。A.mechanic

alenergytokineticenergytopotentialenergyB.mechanicalenergytopotentialenergytokineticenergyC.potentialenergytom

echanicalenergytokineticenergyD.kineticenergytomechanicalenergytopotentialenergy1734B1735A1736Thesizeof

ballandmilerbearingscanbeidentifiedbythe____1736．球轴承和滚珠轴承的尺寸由制造商的系列号来识别。A.rollingmembersizeB.innerraceconewidthCmanufacturer'snumericalcodeD.o

uterringwidth1737Anadvantageofahelicalgearpumpoverasimplegearpumpisthatthehelicalgearpumpiscapableof____1737．螺旋式齿轮泵

与简单齿轮泵相比，优点是能产生更平稳的排量。A.maintainingasteadierspeedB.deliveringliquidsovergreaterdistancesC.operatingforlongerperiodsof

timeD.producingasmootherdischargeflow1738Refrigerantisnormallysub-cooledinarefrigerationorairconditioning

systemcondenserto____1738．在制冷系统的冷凝器中，制冷剂通常处于过冷状态，以防在液相管路产生闪发。A.maintainadequatecoilbackpressureB.prohibitflashinginthe

liquidlineC.reducerefrigerantvolumeinthesystemD.reducecompressordischargelineloading1736C1737D1738B1739Theprincipalpurpo

seofsub-coolingliquidrefrigerantpriortoitsentering1740theexpansionvalveisto____1739．制冷剂在进入膨胀阀前通常处于过冷状态，以防在液相

管路产生闪发，从而提高制冷效果。A.increasetherefrigeratingeffect,bydecreasingtheamountofflashgasB.allowtherefrigeranttoenterthethrottlingd

eviceinasaturatedconditionC.increasetherefrigeratingeffectbyincreasingtheamountofflashgasD.minimizethetemperaturedropoftheliquidasitpassesth

roughthesolenoidvalvetotheoutletside1740Ifabilgepumpisabletodevelopvacuum,butisunabletosufficientlypumpoutthebilges,youwouldcheckforall

ofthefollowingEXCEPT____1740．如果舱底水泵建立起良好的真空度，但不能正常泵水，不可能的原因是电路问题，因此不需要检查回路切断器。A.thecircuitbreakerB.forleaksint

hesuctionpipingC.reliefvalveisnotproperlyseatedD.thesuctionstrainer1741Sub-coolingisamethodofreducingthetemperatureoftheliquidrefrigerantbel

owits____1741．“过冷”是指将液态制冷剂的温度降低到其冷凝温度以下。A.freezingpointB.flocpointC.condensingtemperatureD.compressiontemperature1739A1740A1741C1742Somevesselsaree

quippedwithawaterlubricatedstemtube.Whenatsea,operating1743undernormalconditions,thewaterservicevalvefromtheship'ssaltw

atersystemtothebearingshouldbe____1742．一些船舶装有水冷式尾轴管(铁梨木轴承尾轴管)，在海上正常航行状态下，船舶海水系统中向轴承供水的海水阀应关闭，只允许少许海水漏人。A.closed,andnoleakagepermittedacrossth

eshaftpackingB.closed,andonlyslightleakagepermittedacrosstheshaftpackingC.open,andnoleakagepermitteda

crosstheshaftpackingD.open,andonlyslightleakagepermittedacrosstheshaftpacking1743Undernormalconditions,therefrigerantenter

sthecompressorinanoperatingrefrigerationsystemasa____1743．制冷系统工作时，进入到压缩机的制冷剂处于过热状态。A.liquidB.drysaturatedgasC.wetsaturatedgasD.superheatedvap

or1744Anexcessiveamountofwaterispreventedfromenteringavesselusingawaterlubricatedstemtubebearingbytheuseofthe____1744。水冷式尾轴承的尾轴管，使

用盘根以防过多的海水进人到船舶。A.propellerhubB.lignumvitaeC.shaftpackingD.labyrinthseal1745Refrigerantenterstheconde

nserasa____1745。制冷系统工作时，进入到冷凝器的制冷剂是高压蒸汽。A.highpressureliquidB.lowpressurevaporC.highpressurevaporD.lowpressureliquid17

42B1743D1744C1745C1746Ifthepumpforahydraulicanchorwindlassisoverheating,thecause1747maybe____1746．如果液压锚机的油泵过热，原因可能是油泵的排出压力过高。A.excessivedrivemoto

rspeedB.excessivepumpdischargepressureC.toolowofatiltingboxangleD.insufficientdrivemotorspeed1747Anindependentbilgesuc

tionisrequiredfor____1747．机器处所的舱底吸口是独立式的。A.ballasttanksB.sludgetanksC.machineryspacebilgesD.cargohold

bilges1748Inaflashdistillingunit,evaporatorfeed(seawater)firstabsorbsheatinthe____1748．在闪发式造水机中，给水(海水)首先从淡水冷却器中吸收热量。A.vaporfeedheat

erB.airejectorcondenserC.saltwaterheaterD.distillatecooler1749Thefunctionoflubricatingoilisto____1749．滑汕的作用是减少运动部件之间的摩擦。A.reducefri

ctionbetweenmovingsurfacesB.provideevendistributionofbearingwearC.reducetheaccumulationofharmfuldetergentsD.maintainaconstantoiltemperatureoutput

ateachbearing1746B1747C1748D1749A1750Adirtyintercoolerontheshipserviceaircompressorwillresultin____1750．船用空压机的中冷器脏了，会导致功率消耗增大。A.decreasedcom

pressionratioB.higherthannormalpowerconsumptionC.un-loadermalfunctionD.waterinthelubricatingoil1751Whichofthelistedconditionswillcauset

hefeedwater,thathasnotflashed1752tovaporinthe____first-stageofaflashevaporator,toflowintothesecond-stage71751

．在两级闪发式造水机中，由于第二级真空度较高，在第一级中未闪发的海水能流向第二级。A.Gravitysiphoneffect.B.Highervacuuminthesecond-stage.C.Differencei

nbrinedensitybetweenfirstandsecondstages.D.Lowerpressureinfirst-stage.1752Undernormaloperatingconditions,thehighesttemperatureandpressurecondi

tionsexistinginaflash-typeevaporatorwilloccurinthe____1752．在闪发式造水机运行过程中，海水加热器处的压力和温度最高。A.firststageB.secondstageC.distillatecoolerD.saltwate

rfeedheater1750B1751B1752D1753Adirtyintercooleronanaircompressorwillcause____1753．船用空压机的中冷器脏了，会导致马达电流增大，功率消耗增大。A.damagetotheun-loaderoperatingdiaphra

gmB.anincreaseincurrentflowtothemotorC.highpressureinthereceiverandfilterD.anexcessiveconsumptionofcrankcaseoil1754Thee

ffectofhighvaporsuperheatinarefrigerationsystem,isa/an____1754．制冷系统中，制冷剂蒸汽过冷度过高，会减少压缩机的排量。A.increasedcapacityofthecomp

ressorB.moreefficientoperationofthethermalexpansionvalveC.decreasedcapacityofthecompressorD.lossofreceivercapacity1755Excessivelu

beoilconsumptionbyareciprocatingaircompressorcanbecausedby____1755．对于往复式空压机，滑油油位过高会引起油耗增加。A.usingaslightlydirtyairfilterB.usingoilhavinganexce

ssiveviscosityC.intercoolerorafter-coolerleaksD.carryingtheoillevelhigherthannormal1753B1754C1755D17

56Inwhichofthelistedrefrigerationsystemcomponentsdoessuperheating1757oftherefrigeranttakeplace?1756．在制冷系统的蒸发器中，制冷剂发生过热。A.ExpansionvalveB.Ev

aporatorC.DrierD.Receiver1757Thevacuummaintainedinthesaltwaterfeedheatershellofaflash-typeevaporatorisgenerallyaccomplishedby____1757．在闪发式造水机中，海水

加热器的真空一般是通过从第一级闪发室引出来实现。A.aseparateairejectorunitB.adirectunimpededconnectionbetweensecondstageandsaltw

aterfeedheaterC.eitherbyvacuumdragoranexternallinefromthefirststageviaafixedorificeD.thefixedorificeprovidedinthesteamsupplyline1758Inarefrig

erationsystem,theamountofrefrigerantadmittedtotheevaporatorisdirectlyrelatedto____1758．在制冷系统中，允许进入到蒸发器的制冷剂

流量直接与其过热度有关。A.thecompressordischargepressureB.condensercoolingwatertemperatureC.thesolenoidvalvedifferentialpressureD.

thesuperheatoftherefrigerantinthetailcoil1756B1757C1758D1759Therefrigerantgasreturningtothecompressorshould

be____1759。回到压缩机的制冷剂蒸汽应该处于过热状态。A.superheatedB.saturatedC.denseD.flooded1760Iftheelectricmotordrivinganaircompressorfailstostart,thecausemay1761bea

____1760、如果空压机的电动机不能启动，原因可能是断路器跳闸。A.leakingunloaderB.trippedcircuitbreakerC.controllineleakD.defectivepo

pvalve1761Thelowpressuresideofarefrigerationsystemisconsideredtoexistfromthe____1761．制冷系统中的低压侧是从膨胀阀到压缩机。A.expansionv

alvetothecompressorB.receivertotheexpansioncoilC.expansionvalvetotheevaporatorD.condensertotheexpansionvalve1762Thecomponentofarefriger

atingsysteminwhichtherefrigerantvaporizesandabsorbsheatisknownasthe____1762．制冷剂在蒸发器中蒸发并吸收热量。A.condenserB.vaporgeneratorC.accumulat

orD.evaporator1759A1760B1761A1762D1763Inwhichoftheareaslistedwouldyouexpecttofindthehighestsalt1764co

ncentrationinaflashevaporator?1763．在两级闪发式造水机中，第二级海水箱中的盐度最高。A.Distillerairejectorcoolingmedium.B.Salt

waterheaterdischarge.C.First-stageinternalfeedbox.D.Second-stageinternalfeedbox.1764AnACsynchronoustransmissiontyperemotesteeringcon

trolsystemconsistsofa____1764．舵机遥控系统中有发送器和接收器。A.transmitteratthesteeringstationandareceiveratthesteeringengineB.reversiblemotoratthest

eeringstationgearedtothesteeringpumpsC.smallinductionmotoronthebridgewhichcontrolstherudderthroughpulleysD.variabledisplacementhydrauli

cpumpdrivenbyareversibleDCmotor1765Tooperateacentrifugalfirepumpatreducedcapacity,youshould____1765．离心式消防泵在低排量工

作时，应关小排出阀A.readjustthereliefvalveB.throttlethesuctionlineC.throttlethedischargevalveD.openthepriming

line1763D1764A1765C1766Whichofthefollowingbestdescribesthethermodynamiceffectonthe1767pressureandvolumerelationshipwithregardstosaturatedgases?l7

66．对于饱和气体而言，压力减少，体积增大。A.Aspressuredecreases,volumeincreasesB.Asvolumeincreases,pressureincreasesC.Asvolumedecreases

,pressuredecreasesD.Aspressureincreases,volumeincreases1767Thedischargerateorcapacityofacentrifugalpumpwillvarydirectlyasthe____1767．离心泵的排量随叶轮直径的

改变而变化。A.changeintheimpellerdiameterB.squareoftheimpellerradiusC.cubeoftheimpellerdiameterD.impellerefficiencyforlarge

changesinitssize1768Whenoperatingwithanegativesuctionhead,whichofthefollowingtypesofpumpswillrequirepriming?l7

68．离心泵不具有干吸能力，运行前需要灌水。A.ReciprocatingB.CentrifugalC.RotaryD.Gear1766A1767A1768B1769Therefrigerantleavestheeva

poratorofarefrigerationsystemasalow1770pressure____1771l769．制冷系统中，蒸发器出口是低压过热蒸汽。1772A.sub-cooledliquidB.hightemperaturel

iquidC.oilsaturatedliquidD.superheatedvapor1770Reducedcapacity,accompaniedbyvibrationandnoiseatthesuctionofacentrifugalpump

isaresultof____1.1770．离心泵排量下降，吸入口伴有振动和噪声，原因是泵发生气蚀现象。2.A.cavitationB.waterhammerC.fluidfrictionD.steamknock1771Inorde

rtoaccuratelymeasureverylowpressures,whichoftheinstrumentslistedshouldbeused'?1.1771．压气计可精确测量很低的压力。2.A.Compoundgag

eB.BourdontubeC.ManometerD.Deadweightgage1772ffacentrifugalbilgepumpwerecontinuallyoperatedwiththedischargevalveclosedthe____1.1772．

离心式舱底水泵，在排出阀关闭的情况下持续运转，会引起泵过热。2.A.motoroverloadwouldopenB.reliefvalvewouldopenC.pumpwouldeventuallyoverheatD.motorwouldo

verheat1773Whichofthelistedpressurecontrolvalveswouldbeusedtoestablishthemaximumoperatingpressureofahydraulicsystem.?1.1773．液压系统中，

压力释放阀用来建立起最大的工作压力。A.Pressure-reducingvalve.B.Unloadingvalve.C.Counterbalancevalve.D.Pressure-reliefvalve.1769D1770A1771C1772C1773D1774T

hetemperatureofarefrigerantgasisthehighest____1774．制冷系统中，压缩机排出口的制冷剂气体温度最高。A.atthecompressordischargeB.atthecom

pressorsuctionC.intheexpansionvalveD.inthereceiver1775Condensateformedwithinthefirst-effecttu~nestofadouble-effect,low1776pres

sureevaporator,isremovedbya____1775．在双效低压蒸发器中，第一级管子内的凝水是由排液泵来排除。A.seriesofbafflesB.crossoverpipeC.condensateseparatorD.drainpump1776Acen

trifugalpumpattemptingtodevelopflowagainstacloseddischargevalvehasa/an____1776、排出阀关闭时，离心泵的排量为零。A.capacityof0%B.efficiencyof100%C.in

ternalslippageof0%D.shutoffhorsepowerratingof100%1777Acompoundgageisusedtomeasure____１７７７、组合式压力表可测量压力和真空度。A.temperatureandpressureB.humidityandtemp

eratureC.pressureandvacuumD.pressureandhumidity1774A1775D1776A1777C1778Whichofthelistedcomponentsisconsideredtoseparatethehighpres

sure1779sideofarefrigerationcyclefromthelowpressuresideofthecycle?1778．在制冷系统中，压缩机和膨胀阀将系统分成低压侧和高压侧。A.Theconden

serandtheexpansionvalve.B.Thekingvalveandthesolenoidvalve.C.Thecompressorandtheexpansionvalve.D.Thecond

enserandthesolenoidvalve.1779Whichofthelistedrefrigerationsystemcomponentskeepstherefrigerantcirculatingthroughthesystem?1779

．在制冷系统中，压缩机用来保持制冷剂在系统中循环。A.ExpansionvalveB.CondenserC.EvaporatorD.Compressor1780WhichofthevalveslistedisNOTconsideredtobeahydraulicsystemdirectionalc

ontrolvalve?1780．卸载阀不属于液压系统中的方向控制阀。A.Spring-centeredvalve.B.Unloadingvalve.C.Three-positionvalve.D.Two-positionvalve.1778C1779D1780B178

1Excessiveoilfoaminginthecrankcaseofarefrigerationcompressoratstartup1782cancause____1781．制冷压缩机启动时曲柄箱油泡沫过多，会引起压缩机因润滑不良而损坏。A.compre

ssordamagefromimproperlubricationB.refrigerantabsorptionbythelubricantC.increasedviscosityinthelubri

cantD.carbondepositonthecompressorsuctionvalves1782Whichofthelistedstatementsiscorrectconcerningthestartingofcentrifugalpumps?178

2。离心泵启动时，排出阀应关闭，即封闭启动。A.Theyshouldalwaysbestartedwiththedischargevalveclosed.B.Theyshouldalwaysbestartedwiththe

dischargevalveopened.C.Aprimingpumpisalwaysrequiredtofloodtheimpellersuction.D.Theyshouldalwaysbestartedwiththesealinglinevalvesclosed.17

83Acompoundgageistypicallyinstalledonthe____1783．组合式压力表一般安装在舱底水泵的吸人侧。A.suctionsideofabilgepumpB.exhaustmanifoldofanaux

iliarydieselC.dischargelinefromanaircompressorD.chemicalfeedtankofanevaporator1781A1782A1783A1784Whenrefrigerantleave

sthereceiver,itflowsnextontothe____1784．在制冷系统中，制冷剂离开贮液器后流向过滤器。A.evaporatorcoilsB.liquidstrainerC.comp

ressorD.condenser1785Thetypeofgagemostcommonlyusedtomeasurepressureisthe____1785．压力测量通常使用波登管式压力表。A.bimetallictypeB.diaph

ragmtypeC.bourdontubetypeD.resistance-temperaturetype1786Whichofthefollowingstatementsistrueconcerningcentrifugalpumps?1786．对于离心泵，叶轮的旋转

给液体施加能量，从而实现流体泵送。A.Theyareparticularlysuitedforpumpinghighviscosityfluids.B.Theyarestartedwiththedischargevalveopened.C.Theflowofliq

uidisdevelopedbyimpartingenergyduetotherotationofanimpeller.D.Theyarealwaysmountedinahorizontalpositio

n.1787Refrigerantiscirculatedthrougharefrigerationsystembythe____...1787．在制冷系统中，压缩机用来保持制冷剂在系统中循环。A.compresso

rB.condenserC.expansionvalveD.evaporator1784B1785C1786C1787A1788Thetemperatureoftherefrigerantintheevaporatorcoildependsmostly1789uponthe____1788．制

冷剂在蒸发盘管中的温度主要取决于蒸发器的压力。A.refrigerantpressureintheevaporatorB.coolingwatertemperaturetothecondenserC.heatloadintherefrige

ratorcompartmentD.solenoidvalveintheliquidline1789Whichofthefollowingtypesofhydraulicpumpswouldbeusedinasteer

ingsystem?1789．在舵机系统中，可采用轴向或径向柱塞泵。A.LobeB.ScrewC.RadialpistonD.Volute1790Anincreaseintheheatloadtoarefrigerationsystemw

illcause____1790．制冷系统热负荷增加会引起吸人温度增加。A.thesuctionpressuretodecreaseB.thesuctiontemperaturetoincreaseC.increasediceformationonth

eevaporatorcoilD.excessiveshortcyclingofthecompressor1788A1789C1790B1791Thedischargeheadofacentrifugalpumpwillv

arydirectlywiththe1791．离心泵的排量与叶轮直径的平方成正比。A.changeinimpellerdiameterB.squareoftheimpellerdiameterC.cubeoftheimpell

erdiameterD.impellerefficiencyforlargechangesinthesizeoftheimpeller1792Tothoroughlypumpoutthebilgesusingahorizontallymountedcentrifugal1793pum

p,the____1792．使用卧式离心泵彻底排干舱底水，离心泵必须要灌水。A.pumpmustalwaysbeprimedB.volutemustimpartaradialandrotarymotionofthewatersuctionsideC.co

nnectionmustguidetheliquidtothelanternringsD.stuffingboxshouldnotbeallowedanywaterleakage1793Whichofthefollowingtermswould

bestdescribethetemperatureatwhichaliquidboilsatagivenpressure?1793．饱和温度是指在给定的压力下液体蒸发的温度。A.Degreeofsaturation.B.Saturationtemperature.C.Superh

eatedtemperature.D.Degreeofsuperheat.1791B1792A1793B1794Arefrigerantwithoilinsolutionhasa____1794．在给定的压力下，

含有油的制冷剂比纯净的制冷剂蒸发温度要高。A.higherboilingtemperatureforagivenpressurethandoesapurerefrigerantB.lowerboilingtemperatureforagivenpressurethando

esapurerefrigerantC.boilingpressureequaltothatofapurerefrigerantatagivenpressureD.boilingpointwillnotbeaffectedbye

ntrainedoil1795Machineryoperatingfeaturesaredesignedtohelpconserveenergy.Whichofthe1796followingresultswillnotcontributetoe

nergyconservation?1795．“冷却器出口温度升高”不涉及能量转换。A.Reductionoffriction.B.Insulationofhotsurfaces.C.Lubricationofmovingpa

rts.D.Elevationofcooleroutlettemperatures.1796Onwhichofthefollowingheatedsurfacesofaflashtypeevaporatorwouldyoubemorelikelytofi

ndsoftscaleformation?1796．在闪发式造水机中，海水力口热器的管壁会产生水垢。A.Feed-waterheaterinternaltubesurfaces.B.Internaldistillatecoolertubes.C.Flashchamb

erverticalsurfaces.D.Distillingcondensertubes.1794A1795D1796A1797Strainersarecommonlyusedinhydraulicsystemsto____1797．液压

系统中使用滤器来防止固体颗粒进人到液压泵。A.protectthepmnpfromfinesolublecontaminantsB.preventsolidparticlesfromenteringthepmnp

C.preventsolidparticlesfromenteringthefilterD.protectthedirectionalcontrolvalves1798Excessiveoilfoaminginthecrankcaseofarefrigerationcompressoris

1799mostlikelytooccurwhenthecompressor____1798．制冷装置很长一段时间停用后启动，压缩机的曲柄箱油会产生过多的泡沫。A.hasmncontinuouslyforalongperiodB.suctionpressureisbelownor

malC.oillevelisbelownormalD.startsafteralongidleperiod1799Inacompressionrefrigerationcycle,thetemperatureoftheliquidrefrigerantex

periencesitsgreatestdecreaseinthe____1799在压缩式制冷循环中，液态制冷剂的温度在膨胀阀处下降最大A.evaporatorB.compressorC.expansionvalveD.condens

er1797B1798D1799C1800Whichofthefollowingstatementsconcerningenergyiscorrect?1800．“宇宙中总能量保持不变。”是正确的。即能

量守恒定律。A.Energycanbecreatedordestroyed.B.Energymaynotbetransformed.C.Thetotalquantityofenergyintheuniverseisalwaysthesame.D.Noneoftheabove.1801

Bywhichofthefollowingmeansisforceefficientlyprovidedtovarythe1802pitchofthebladesonamodemcontrollablepitchpropeller?1801．调距桨一般采用液压调距

机构。A.HydraulicB.MechanicalC.PneumaticD.Electrical1802Whichofthelistedstatementsiscorrectconcerningrefrigerationsystems?1802．25

t的制冷系统与在24h之内溶化25t冰具有同样的冷却效果A.Dehydratorsmustbeusedcontinuouslyinarefrigerationsystem.B.A25tonrefrigerationsystemhasthesamecoolingeffectasmelting2

5tonsoficein24hours.C.Athermostaticexpansionvalveisusedtocontrolrefrigeratedspacetemperature.D.Theliquidreceiverfunctionstoco

llectandremovenon-condensablegases.1800C1801A1802B1803Whenthevessel'ssteeringwheelonthenavigationbridgeisturned,the1804differenceexi

stingbetweenthepositionofthewheelandthatoftheredderisknownas____1803．当在驾驶台转动舵轮时，舵轮的位置与舵的位置之间的差，称为偏差信号。A.proportionalbandB.theerrorsignal

C.theresetsignalD.feedback1804Whichoftheconditionslistedrepresentsthegreatesteffectofexcessfrostaccumulationontheevap

oratorcoils?1804．蒸发盘管严重结霜将降低制冷装置的效率。A.Keepstherefrigeratedspacecooler.B.Reducestheefficiencyoftheplant.C.Takestheloadoffthecompressor.D.Hasnoaff

ectonthesystem.1805Inthedesignofhydraulicpipingandequipmentconsiderationisgiventominimizeturbulenceinthehydraulicfluid,asthiswillcaus

e____1805．在液压管系和设备的设计中，应考虑尽量减少液压流体的扰动，因为流体扰动将会引起能量损失。A.molecularfluidvibrationB.energylossesC.widepressurevariationsD.mechanicald

amagetocontrolvalves1803B1804B1805B1806Ifarefrigerationcompressorisrunningcontinuouslywithoutlowering1807thetemperatureintherefrigeratedspace,th

etroublemaybe____18081806．如果制冷压缩机持续运转但不能实现降温，可能原因是制冷剂不足。1809A.ashortageofcompressoroilB.warmfoodintherefrigeratorC.excessi

vecondensercoolingwaterD.ashortageofrefrigerant1807Whichofthevalveslistedshouldbeusedeitherinthefullyopenedorthefullyclosedposition?1.1807．门阀只能在全开或

全关状态下工作。2.A.AgatevalveB.AglobevalveC.AnycheckvalveD.Anyneedlevalve1808WhichofthefollowingmodesofheattransferdoesN

OTrequireany____physicalcontactbetweenawarmerandacoolersubstance?1.1808．辐射传热不需要物体的直接接触就能实现。2.A.Radiation

B.ConductionC.NaturalconvectionD.Alloftheabove1809Agatevalveinstalledinapipelineshouldbe____1.1809，门阀只能在全开或全关状态下工作。2.

A.usedineitherthefullyclosedorfullyopenedpositionB.installedwiththestemdownC.usedforsteamserviceonlyD.usedtothrottleorregulateth

eflowofliquid1806D1807A1808A1809A1810Themovementofheatwithinafluid,causedbytheapplicationofthermal1811energy,iscalled____181

0，山热能的作用引起流体内部热量的运动，称为对流。A.radiationB.conductionC.convectionD.condo-radiation1811Aircompressorcylinderun-l

oadersenablethecompressorto____1811．空压机的卸载装置使压缩机在空气压缩前启动并达到一定转速、A.varytheirspeedaccordingtotemperatureandloadB.startandcomeuptospeedbef

oreaircompressionbeginsC.changespeedaccordingtooverloaddemandsD.reducecompressedairchargedensity1812Whichoftheconditionslistedwillcausearefrigeratio

ncompressortorunconstantlywithoutsimultaneouslydecreasingthetemperatureintherefrigeratedspace?1812．如果制冷压缩机持续运转但不能实现降温，可能原因是制冷刹不足A.Shortageofrefr

igerantoil.B.Slightshortageofrefrigerant.C.Excessivecondensercoolingwaterflow.D.Faultyexpansionvalve.1810C1811B1812B1813Whicho

fthelistedmethodsofheattransfertakesplacewhentwosubstancesofdifferenttemperaturesareinphysicalcontactwitheachother?1813．两种不同温度的物体，通过直接接触实现

热量传递的过程是热传导。A.RadiationB.ConductionC.ConvectionD.Eachoftheabove1814Theunloadingsystemonanaircompressorwill____1814．空气压缩机的卸载设备能卸走启动时除了摩擦负荷外的所有

负载。A.increasecompressordischargepressureondemandB.increasecompressoroperatingspeedasnecessaryC.allowthemotortoturnthecompressoropposedo

nlybyfrictionD.reducethecompressorfrictionalloadwhenstarting1815Awarmerthannormalcompressorsuctionlinemightbec

ausedby____1815．压缩机吸人管温度过高通常是由制冷剂不足引起，A.insufficientlubricationB.insufficientrefrigerantC.excessrefriger

antD.excessiveopeningoftheexpansionvalve1813B1814C1815B1816Whichofthefollowingconditionsmustexistforheatt

oflowfromone1817objecttoanother71816．两种物体之间必须具有温度差，才能实现热量传递：A.Thetwoobjectsmustbeinphysicalcontact.B.Thetwoobjectsmustbethesamesize.C.Theremustbea

nexistingtemperaturedifferential.D.Theremustbeanexistingweightdifferential.1817Intherefrigerationsystem,ashortageofref

rigerantisindicatedby____1817．制冷系统中制冷剂不足通常表现为示液镜中有气泡；A.thecompressorshortcyclingonhighpressurecutoutswitchB.highsuctionpr

essureC.highheadpressureD.bubblesinthesightglass1816C1817D1818Condensatemustbedrainedfromtheintercooleranda

fter-coolersofanair1819compressorbecause____1819、如果制冷系统中制冷剂不足，将会导致压缩叽持续运转、A.thecoolingeffectofthecondensatereducest

hecompressor'sefficiencyB.adangerofexplosionexistswheneverwaterispresentinacompressorC.watercauseserraticoper

ationofpneumaticcomponentsD.thevolumetriccapacityofthefirststageisreducedifwaterremains1819Ifarefrigerationsystemwereshortofrefrigerant,thec

onditionwouldresultin____1820、如果舵机系统液压油中含有空气，舵将反应迟钝。A.continuousrunningofthecompressorB.highsuctionpressureC.

highdischargepressureD,shortcyclingofthecompressoronthewaterfailureswitch1820Whenairbecomestrappedinthehydraulicfluidofasteeringsystem,the____1

821．往复式蒸汽泵停用很长一段时间后重新启动前，应将汽缸排干。A.redderwillrespondsluggishlyB.hydraulicramswillover-speedC.sightglasswillshowbubblesD.mmreliefvalveswilllift1

818C1819A1820A1821Beforestartingareciprocating,steam-drivenpumpthathasbeenidleforaperiodoftime,youshould____1821．往复式蒸汽泵停用很长一段时间后重新启动前，应

将汽缸排干。A.openthesteamlinerootvalveB.drainthesteamcylinderC.closethesteamcylinderdrainsD.opentheliquidcylinderdrains1822Theairchargel

eavinganintercooler,orafter-coolerofanaircompressor1823canbeexpectedtobe____1822．经过空压机中冷器或后冷器的空气应处在露点或露点以下。A.

superheatedB.super-cc~ledC.atorbelowthedewpointD.Alloftheabove1823Noiseinarefrigerationcompressorcan

becausedby____1823．轴承、活塞销磨损；液击；过多滑油循环等都会造成制冷压缩机噪声。A.wornbearingsandpistonpinsB.sluggingduetofloodingbackC.toomuchoilincirculationD

.Alloftheabove1824Thermalenergyintransitionisalsoreferredtoas____1824．热能是以热量传递方式进行的。A.heatB.powerC.horsepowerD.foot-pound1821B1822C1823D1824A1825"

Floodingback"isaconditionwheretheliquidrefrigerant____1825。液态制冷剂从吸人管到达压缩机，便产生“液击”。A.vaporizesinthecondenserB.reachesthe

compressorthroughthesuctionlineC.flashesintheliquidlineD.condensesinthereceiver1826Theenergyassociatedwithmoleculesisknownas____18

26．与分子运动有关的能量称为热能。A.kineticenergyB.potentialenergyC.mechanicalenergyD.thermalenergy1827Overgreasingofballbearingsinstalled

onpumpswillresultin____1827．安装在泵浦中的球轴承，如果加注油脂过多，会导致轴承过热。A.smootherpumpoperationB.overheatingofthebea

ringC.reducedcorrosioninthebearingD.increasedpumpcapacity1828Airtrappedinthehydraulicfluidofasteeringsystemshouldbeindicatedby_

___1828．如果舵机系统液压油中含有空气，舵将反应迟钝。A.thepumpover-speedingB.animproperrudderresponseC.bubblesinthesightglassD.ramreliefvalveslifting1825B1826D1827B1828

B1829Whiletroubleshootingarefrigerationsystemforlowheadpressure,1830liquidrefrigerantfloodingbackfromtheevaporatorisdeterminedtobethecaus

e.Itmaybenecessaryto____1829．由于液态制冷剂流回到蒸发器，造成制冷系统吸人压力低。此时，应改变膨胀阀的调节A.changetheexpansionvalveadjustmentB.

readjustthewaterregulatingvalvetoincreasetheflowofwaterC.purgeairfromthecondenserD.cleanthewatersideofthecon

denserl830Onsmall,lowpressure,aircompressors,thecylindersareusuallylubricatedbythe____1830．在小型、低压空气压缩机中，气缸通常通过飞溅

的方法来润滑。A.splashmethodB.mechanicalforcefeedlubricatorsC.detachedsumpmethodD.internalcoolingpassagesinthecrankshaftsandconn

ectingrods1831Tocorrecttheconditionofsluggingandfloodingbackinarefrigerationsystem,itmaybenecessaryto____183

1。通过调节热力膨胀阀，能纠正制冷系统产生液击现象。A.re-adjustthedischargepressureB.cleantheexpansionvalvescreenC.addrefrigerantD.adjusttheexpansionvalve

1829A1830A1831D1832Powerisdefinedasthe____1832．功率可定义为“作功的速率”。A.rateofdoingworkB.amountofforceneededtoovercomefrictionC.a

mountofworkaccomplishedD.distancethroughwhichanobjectismoved1833Whichofthelisteddeviceswouldbeinstalledatacontrolsystemair1834pressurereducings

tation?1833．空气控制系统的减压装置中安装了分水器。A.MoistureseparatorB.VacuumbreakerC.LubricatorD.Non-returnvalve1834Airlinel

ubricatorsareusedincompressedairsystemstolubricate____1834．压缩空气系统中的注油器用来润滑气动的工具和设备。A.thesuctionanddischargeval

vesB.toolsandequipmentservedbycompressedairC.airlinereducingvalvesD.alloftheabove1832A1833A1834B1835Whenavesselisindry-dock,thevessel'sengi

neersshould____1835．当船舶在坞修时，轮机员应检查螺旋桨的状况。A.examinetheconditionofthepropellerB.chipandpaintallhullprotectionzi

ncsC.installnewdockingplugsinallcofferdamsD.inspectthehullforhoggingorsagging1836Ifyouchangefromalowp

ourpointlubricanttoahighpourpointlubricantinarefrigerationsystem,____1836．在制冷系统中，把低倾点的滑油换成高倾点的滑油，滑油将会在蒸发器中冻结。A.compressorlubricationwillbei

mprovedB.oilwillnotleavethecrankcaseC.compressorvalveswillbedamagedD.oilmaycongealintheevaporator1837Mechanicalenergyintransitionisrefe

rredtoas____1837．机械能是以功的形式转变的。A.horsepowerB.workC.heatD.velocity1835A1836D1837B1838Badlyleakingrefrigerationcompressordischargeval

veswillcause____1838．制冷压缩机排出阀严重漏气，将引起压缩机持续运转。A.overfeedingoftheexpansionvalveB.damagetothecondenserC.constantr

unningofthecompressorD.floodingofthereceiver1839Inarefrigerationsystemequippedwithareciprocatingcompressorandawa

tercooledcondensingunit,leakingcompressordischargevalveswillresultin____1839．制冷压缩机排出阀严重漏气，将引起压缩机排出压力偏低。A.refrigerantflo

odingofthecompressorB.lowsuctionpressureC.noisycompressoroperationD.lowheadpressure1840Thedeliveryrateofanaxial-

pistonhydraulicpumpiscontrolledbyvaryingthepositionofthe____1840．轴向液压泵的排量是通过改变倾斜盘的位置来控制。A.slidingblock

B.pintleC.reactionringD.tiltingboxorswashplate1838C1839D1840D1841Whichofthefollowingtermscouldbeappliedtothesimpledefinition1842"

theenergyofmotion”?1841．“动能”可简单地定义为“运动的能量”。A.ElectricalenergyB.ThermalenergyC.PotentialenergyD.Kineticenergy1842ffthedischargevalvesonarefriger

ationcompressorareleakingbadly,thecompressorshould____1842。制冷压缩机排出阀严重漏气，将引起压缩机持续运转。A.runcontinuouslyB.notstartC.havehighdischargepressureD.shor

tcycleonthehighpressureswitch1843Increasingthespeedofacentrifugalpumpwillresultinanincreaseinitscapacity.Anothermeansofincreasingth

ecapacityofacentrifugalpumpistoincreasethe____1843．提高离心泵的排量一般有两种方法：提高转速；增大叶轮的直径A.diameterofthedischargepiping,withallotherfactorsremai

ningthesameB.diameterofthesuctionpiping,withallotherfactorsremainingthesameC.widthoftheimpelleronlyD.diameteroftheimpeller1841D18

42A1843D1844Excessiveairleakageintothesuctionsideofacentrifugalpumpwouldbe1845indicatedbywhichofthefollowingoperationalpro

blems?1844．过多的空气漏人到离心泵的吸人侧，离心泵的排量将逐渐减少。A.Thepumpdeliversfullcapacitywhenstarted,butgraduallyslackensofftoanabnormallylowflow.B.Thepumppackinggland

overheatsaftershortoperatingperiods.C.Themotorover-currentprotectivedevicecontinuallyshutsthepumpdown.D.Poundi

ngnoisescanbeheardatthepumpsuctionchest.1845Whileinspectingthesteeringsystematsea,youshouldcheckfor____1845．在海上检查舵机系统时，应注意检查系统的漏泄情况。A.airbubble

sinthesightglassB.anyleaksinthesystemC.over-travelintherudderangleindicatorD.lostmotionintherams1846W

hichofthefollowingformsofenergyisdemonstratedthroughtheprocessofcombustion?1846．燃烧过程中释放化学能。A.ChemicalenergyB.MechanicalenergyC.Thermalen

ergyD.Electricalenergy1844A1845B1846A1847Thecapacityofacentrifugalpumpcanbeincreasedbytheinstallationof

1848.alargerdiameterimpeller.Anothermeansofincreasingthepumpcapacityisto____1847．提高离心泵的排量一般有两种方法：提高转速；

增大叶轮的直径。。A.increasespeedB.increasethesizeofthecardentassemblyC.reducewearingringclearancesD.changethepumptoa"close

coupled"arrangement1848Aspurgearpumpshouldbeoperatedwiththedischargevalves____1848．齿轮泵启动时应将排出阀全部打开。A.slightlyopenedB.throttledC.fullyopened

D.halfwayopened1849Theoilinacargowinchgearboxshouldbesampledperiodicallyto____1849．起货机齿轮箱油应定期取样，确保不被污染A.preventthegearboxfromleakingB.preventthe

oilfrombecominginflammableC.makesureithasnotbecomecontaminatedD.makesurethemotorbearingsarelubricated1847A1848C1849C1850Whenthesteeringgearis

inoperation,youshould____1850．在舵机工作过程中，应注意检查是否有过多的油从撞杆处泄漏。A.checkhydraulicoillevelseveryhourB.cheektheramsforoverheatingC.cheekf

orexcessiveoilleakagefromramsD.drainwaterfromtelemotorcylinderseachwatch1851Anexcessivechargeofrefrigerantinanair-cooledrefrige

rationsystemcancause____1851．空气冷却式制冷系统，制冷剂充注过多，将使压缩机的排出压力偏高。A.oilfoaminginthecompressorB.higherthannormalsuctionanddischargepressureswithahigherboxte

mperatureC.higherthannormaldischargepressurewithanormalboxtemperatureD.thecompressortoruncontinuously1852Theoutputvolumeofapositivefi

xed-displacementpumpcanbechangedonlyby____1852。容积式泵的排量只能通过改变泵的转速来改变。A.changingtheangleofthetiltingplateB.changingthespeedofthepu

mpC.movingtheslideblockandrotorD.movingtheShafttrunnionblock1850C1851C1852B1853Ifyouaregiventhejobofaddinghydraulicfluidtoamooringwinch,

and1854arenotcertainastothetypeoffluidtouse,youshould____1853．给绞缆机加注润滑油时，如果对使用的液压油种类不清楚时应查阅制造商的说明书。A.addfluidthatisthesamecoloras

thefluidinthereservoirB.addturbineoilbecauseitisalwaysagoodsubstituteC.addanyoilthathasthesameviscosityasthehydraulicfluidD.ch

eckthewinchmanufacturer'sinstructionbook1854Agradualdecreaseinthedischargepressureofanoperatinghydraulicpumpcanbecausedby____1854．液压泵的排出压力逐渐下降，可能是由于

油箱中的滤器堵塞引起。A.thefour-waycontrolvalvefailingtoshiftB.thebleedervalvestickingintheopenpositionC.coldhydraulicfluidD.aclo

ggedairventfilterontheoilreservoir1853D1854D1855Therateofheattransferfromahotregiontoacoldregionisaffectedmostbythe____18561855．从高温区到

低温区的热量传递速度受两者的温差影响最大。1857A.sizeoftheheatsinkB.temperaturedifferencebetweentheregionsC.sizeoftheheatsourceD.totalheatofthesystem1856Who

isresponsibleforensuringthatsomeoneisassignedtoclosethewatertightdoorsinanemergency?1.1856．在应急情况下，船长负责指派人员关闭水密门。2.A.MaritimeSafetyAdministrati

on.B.Masterofthevessel.C.ChiefEngineer.D.ChiefMate.1857Whichofthefollowingstatementsiscorrectconcerningheattransfer?1.1857．从高温

区到低温区的热量传递速度受两者的温差影口向最大。A.Heatisgivenofffromahightemperaturelaegionknownasaheatsink.B.Heattransferrateisaffectedmostbythesizeoftheh

eatsinkinvolved.C.Heattransferrateisaffectedmostbythetemperaturedifferencebetweentheheatsourceandtheheatsink.D.Heatt

ransferbyradiationwilloccuronlybymassmotionofafluidsubstance.1855B1856B1857C1858Whenarefrigerationcompressor

hasdevelopedahighheadpressureasaresultof1859arefrigerantovercharge,youshould____1858．制冷剂充注过多，将使压缩机的排出压力偏高。此时，应释放系统中的部分制冷剂。A.i

ncreasetheamountofcoolingwatertothecondenserB.decreasetheamountofcoolingwatertothecondenserC.addmorerefrigeranttothesys

temD.removesomerefrigerantfromthesystem1859Ontankvesselsequippedwithpoweroperatedcargotankvalves,thetypeofpoweroperatormostcommonlyusedi

s____1859，油轮上，货油舱的阀门通常是液压驱动的。A.hydraulicB.electricC.steamD.diesel1860Iftheviscosityoftheliquidbeingtransferredremainsconstantasthedischarg

epressureincreases,therotarypump1860．对于旋涡泵，如果随着排出压力的提高，被泵送的液体粘度保持恒定，泵的排量将下降。’A.capacitywillincreaseB.capacitywilldecre

aseC.suctionpressurewillincreaseD.suctionpressurewilldecrease1858D1859A1860B1861Ifthesuctionpressureattherefrigerationcomp

ressorisbelownormal,the1862causecanbe____1861．制冷压缩机吸人压力偏低，原因可能是吸人滤器堵塞。A.refrigerantoverchargeB.overfeedingbytheexpansionvalveC.arestrictedsuctio

nstrainerD.duetoshortcyclingofthecompressor1862Asalinityindicatorisusedtodeterminethe____1862．盐度指示仪用来

判断被海水污染的区域。A,causeofsaltcontaminationB.locationofsaltwatercontaminationC.chemicalmakeupoffeed-waterD.levelofalkalinityincondensate1863Ift

hereliefvalveonthedischargesideofahydmtdicpumplifts,thecausecouldbe____1863．液压泵排出侧的释放阀打开，原因可能是液压泵和液压马达之间的管路堵塞。A.alowloadontheunitB.acloggedpumpsuctio

nstrainerC.ablockageinthelinebetweenthepumpandhydraulicmotorD.thehydraulicmotorturningtoofast1861C1862B1863C1864Therateofheattransf

erbetweenthehotandcoldfluidspassingthrough1865ashell-and-tubetypeheatexchangerwill____1864．经过壳管式热交换器的热、冷两种流体

之间的热交换速度在各截面都是不同的。A.remainconstantalongthetube'slengthB.begreatestinasinglepasscounterflowheatexchangerC.remainconstantth

roughouttheheatexchangerD.varyfromsectiontosectionthroughouttheheatexchanger1865Thetemperaturedifferentialoccurringbetween

theinlettemperatureofthefluidtobecooledandtheoutlettemperatureofthecoolingmediuminashell-and-tubeheatexchangerisgreatestinwh

ichoftheflowdesignslisted?1865．经过壳管式热交换器的热、冷两种流体，如果设计成对流流动，则被冷却流体的进口温度与冷却介质的出口温度之间的温差最小，即冷却效果最好。题干中“greatest”应改为smallest”。A.Cros

sB.ParallelC.CounterD.Circular1866Thegeneralpurposeofaheatexchangeristo____1866．热交换器的作用是用另一种流体来加热或冷却一种流体。A.eliminatehotairfromthecondenserB.mainta

insteadypressureinasystemC.heat,orcoolonefluidbymeansofanotherfluidD.reducetheengineroomtemperatureintropicalclimates1864D1865C1866C1867Whichof

thefollowingproblemscouldca~thehighpressurecutoutswitchtoshut1868downthecompressorinarefrigerationsystem?1867．冷凝器

中冷却水量不足，将导致冷凝压力过高，从而使高压继电器产生动作使压缩机停转。A.AshortageofliquidrefrigerantB.ExcessivefrostontheevaporatorC.Excessivecondense

rcoolingwaterD.Insufficientcondensercoolingwaterflow1868Anincreasingheadpressureinarefrigerationsystem,withoutanycorrespondingchangeinthecoolingwater

inlettemperature,wouldprobablybecausedby____1868．制冷系统中，冷却水进口温度没有变化，但冷凝压力增高，可能是由于系统中含有空气和其他不凝性气体。A.restrictioninrefrigerantpipingB.airandnon-cond

ensablegasesinthecondenserC.waterintherefrigerantD.floodingbackofliquidrefrigerantfromtheevaporator1869fftherefrigerationcompressorwasdevelopi

nghigherthannormaldischargepressure,thiscouldbearesultof____1869．如果制冷压缩机的排出压力偏高，可能是由于系统中含有空气或其他不凝性气体。A.airornon-co

ndensablegasesinthesystemB.leakingdischargevalvesC.leakingsuctionvalvesD.liquidrefrigerantfloodingbackfromthecoolingcoil1867D1868B1869A1

870fftheheadpressureofareciprocatingrefrigerationcompressorisexcessive,____1870．压缩机的排出压力过高，将使高压继电器产生动作使压缩机停转。A.therelief

valveshouldopenbeforethehighpressurecutoutB.thereliefvalveshouldopenandallowtheexcessrefrigeranttoflowtothereceiverC.thehighpressurecutoutswitchshou

ldoperatebeforethereliefvalveopensD.youshouldcloseinonthesuctionvalve1871Pittinginthesuctionareasofacentrifugalpumpbronzeimpellerisusuallyca

usedby____1871．离心泵叶轮吸口处起麻点，通常是由于气蚀引起的。A.cavitationB.electrolysisC.abrasionD.corrosion1872Thecontrolmodeinwhichthefinalcontrolelementi

smovedfromoneoftwo1873fixedpositionstotheotherisknownas____1872。最终的控制单元是从两个固定的位置之一移动到另一个位置，这种控制模式称为“开关控制”。(双位控制)A.deadbandactionB.neutralzonea

ctionC.rangeD.on-offaction1873Onecauseofhighheadpressureoccurringinarefrigerationsystemcanbe____1873、如果制冷压缩机的排出压力偏高，另一个可能原因是冷凝器冷却水不足。A.insufficientco

olingwaterflowtothecondenserB.alowrefrigerantchargeinthesystemC.theliquidvalveisopentoomuchD.highevaporatorsuperheat1870C1871A1872D

1873A1874Theusualsymptomsofcavitationinacentrifugalpumpis____1874．离心泵气蚀的常见征兆是噪声和振动。A.noiseandvibrationB.anincreaseindischa

rgepressureC.anincreaseinsuctionpressureD.liftingofthereliefvalve1875WhichoftheproblemslistedwouldcausethedischargetemperatureofanR-121876refriger

ationcompressortoincrease?1875．冷凝器堵塞或污垢将会引起刚2制冷压缩机排温升高。A.Thermalexpansionvalvefrozenopen.B.Suctiongasheatexchangerby

passed.C.Condensercloggedorfouled.D.Highpressurecutoutswitchinoperative.1876Lowcompressorheadpressureinarefriger

ationsystemcanbecausedby____1876．如果制冷压缩机的排出压力偏低，可能原因是冷凝器冷却水过量A.insufficientcondensercoolingwaterB.excessi

vecondensercoolingwaterC.airintherefrigerationsystemD.excessiverefrigerantinthesystem1874A1875C1876B1877Apressuredropthroughtherefrigerantliqui

dlinemaycause____1877．液态制冷剂管路发生压力降，将会引起液态管路发生闪气。A.solenoidvalvetoseizeB.compressortohuntC.formationofflashgasintheliquidlineD.expansio

nvalvetofreezeopen1878Heavywearinaparticularareaoftheinnercircumferenceofapackingring1879maybecausedby____1878．盘根环内圆周特定区域严重磨损，通常是由

于轴承严重磨损引起A.ahighsuctionheadB.rotatingringsC.badlywornbearingsD.aloosestuffingboxgland1879Whichofthelis

tedpumpsisNOTapositivedisplacementpump?1879．离心泵不属于容积式泵：A.CentrifugalB.ReciprocatingC.GearD.Rotary1880Ifthethermal

bulbofanexpansionvalveisincorrectlyplacedatthecenterofthecoilinsteadoftheend,itwill____1880．热力膨胀阀的感温包应放置于蒸发盘管的出口端。如果放在蒸发盘管的中间位置，将会减少蒸发盘管

的蒸发量。(因膨胀阀开度减小)A.increasethecapacityofthecoilB.increasethesuperheatatthebulbC.delivermorerefrigeranttothecoilD.decreasethecapacityofthec

oil1877C1878C1879A1880D1881Themajorsourceofchemicalcontaminantsinhydraulicfluidis____1881．液压油的化学污染源主要是

氧化产物。A.microscopicsteelshavingsB.abrasivewasteC.anti-oxidantcompoundsD.oxidationby-products1882Theamountof

fluidfrictionorinternalfrictioninherentinaminerallubricatingoilis1883reflectedasameasureofits____1882．润滑油中的内阻力大小是用帖度来表示的。A.specificgravityB.v

iscosityC.S.E.numberD.hydrolyticstability1883Thermostaticexpansionvalvescanbeadjustedfor____1883．热力膨胀阀仅用来调节过热度。A.suctionpressureonlyB.headp

ressureonlyC.superheatonlyD.suctionpressureandboxtemperature1884Agreasegunisgenerallyusedtolubricatea____1884．牛油枪可用来润滑凝水泵(淡水泵)的

球轴承。A.condensatepumpballbearingB.mainshaftbearingC.mainturbinebearingD.dieselenginewristpinbearing1885Aninternalbypassisprovidedonsomehyd

raulicsystemsuctionstrainerstohelpreducethepossibilityof____1885，在液压系统吸口滤器中安装内部旁通管，以减少泵发生气蚀A.aerationoftheoilB.contaminationoftheoilC.pumpcavitationD

.spongyactuatormovements1881D1882B1883C1884A1885C