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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

.positivedisplacementpumpC.centrifugalpumpD.centripetalpump1091Througha_______pump,theliquidistransferredfromthesuct

iontothe1092dischargebythemechanicalvariationofthevolumeofachamberorchambers.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-pumpisasingle-screwpump.Thatmeansitconsistsof_______rotor(s).单螺杆泵只有一个转子。A.oneB.twoC.threeD

.four1093Thegearandscrewpumpsareclassifiedas____齿轮泵和螺杆泵都属于容积式泵。A.variablestrokepumpsB.multistagepumpsC.positivedisplacementpumpsD.triple-ported

pumps1094Gearpumpsareofpositivedisplacementtypepumpsbecausetheydischargeanearconstantamountofliquid_______pressure.不管

压力如何，齿轮泵的排量几乎恒定。A.dependingonB.inrelativetoC.regardlessofD.becauseof1090B1091A1092A1093C1094C1095Agearpumpbelongsto_______accordingt

oitsworkingprinciple.根据工作原理，齿轮泵属于容积式泵。A.reciprocatingpumpsB.positivedisplacementpumpsC.centrifugalpumpsD.centripetalpumps1096Thepressureheadofap

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

dpressureenergybymeansofarotating_______providedwithvanes.离心泵通过旋转带有叶片的叶轮来产生压力能。A.propellerB.impellerC.circumferenceD.screw1098Thedischar

geflowofareciprocatingpumpis____往复泵的排量具有脉冲性。A.steadyB.inpulsationC.continuousD.large1099Ina_______thecenterscrewisdrivenandtheout

erscrewsidle.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.cent

rifugalpumpsD.centripetalpumps1095B1096C1097B1098B1099C1100B1101Theamountoffluiddeliveredbyascrewpumpcanberegulatedby_______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.1102Whileflo

wingthroughthevoluteinacentrifugalpump,partofthe_______energyoftheliquidisconvertedto_______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/height1103Theamountoffluiddeliveredbyacentrifugalpumpcanb

eregulatedby_______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.throttlingthepressurelineB.changingthespeedoftherotorC.eitherAorBD.No

neoftheaboveistrue.1104Theamountoffluiddeliveredbyareciprocatingpumpcanberegulatedby______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.throt

tlingthepressurelineB.changingthespeedofthepistonC.eitherAorBD.Noneoftheaboveistree.1105Theamountoffluiddeliveredbyapositivedisplacementpumpcanber

egulatedby_____对于容积式泵，排量只能通过改变转子的速度来调节。A.throttlingthepressurelineB.changingthespeedofthedrivingrotorC.eitherAorBD.Noneofth

eaboveistrue.1101B1102A1103C1104B1105B1106WhichofthefollowingpumpsareseE-priming,andcandealwithhquidfromalevelbelowt

hepump?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.②and③1107Theamountoffluiddelivered

byahelicalpumpcanberegulatedby_______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.changingthespeedoftherotorC.eitherAorBD.Noneoftheabov

eistrue.1108Apositivedisplacementpumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedto_______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/drawtheliquidinC.suction/drawD.deliver/outlet1109Throttlinginthe_____

_lineofacentrifugalpumpinvolvestheriskofthepump1110cavitation.对于离心式泵，节流吸人管路，会产生气蚀危险。1111A.suctionB.exhaustC.pressur

eD.discharge1110Asforahydraulicsingleactionvanepump,theinnerwallofthestatorisusuallyof______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.hexagon1106B1107B1108A1109A1110Al111Asforahydraulicvanepump,whichofthefoll

owingisincontactwiththevanesduringworking: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.neitherAnorBl113Areciprocatingpumpbel

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

ripetalpumps1114A_______pumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedtodrawtheliquidinandthendecreasedtoforceth

eliquidout.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.centripetal1115

Whatisthepurposeofareliefvalve?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.toreturnliquidtosuctionsideifdis

chargevalveisclosedD.Alloftheabovearetrue.1111A1112C1113B1114B1115C1116Thepumpdischargepressurewillbeconsiderablyhigherthanth

epressureatthe_______泵的排出压力比泵进口支管的压力要高得多。A.pumpentrybranchB.outletpipeC.impellerD.Noneoftheaboveistree.1

117Whichofthefollowingpumpsbelongstocentrifugal-pump?扩压式泵属于离心式泵。A.PistonpumpB.ScrewpumpC.Diffuserpump

D.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_______pumpsacloseddischargevalvewillcausebur

stingdischargepressure.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.injectorD.water11221120Whicho

fthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump;①ejector;②screw;③centrifugal.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.1120B1121Theamountoffluiddeliveredbyagearpumpcanberegulatedby_______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.Noneoftheaboveistrue1122Attemptsaremadetoeli

minateaxialthrustincentrifugalpumpby_______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.providingtheimpellerwithbalancingholesB.theuseofsy

mmetricalimpellerC.neitherAnorBD.eitherAorB1123Whichofthefollowingpumpswillbuildupaburstingpressureorstalltheirmotor

sifthedischargevalvesareclosed?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.②and③1124Wh

ichofthefollowingoperatingfeaturesdodisplacementpumpsbeariftheyare1125workingunderno-cavitationcondition?①.o

utputisalmostdirectlyproportionaltospeed;②.theyareself-priming;③.theywilldevelopadischargedpressureequaltotheresistancetobeovercome,irrespectiveofs

peed.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_______pumpdischargesanearlyconstantamountofl

iquidregardlessofpressure.不管压力如何，容积式泵的排量几乎恒定。A.mixed-flowB.axial-flowC.centrifugalD.displacement1121B1122D1123C1124D1125D1126Whichofthefollowingp

umpsisusedwherearelativelyhighpressureandsmallcapacityarerequired?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.Alloftheabove1127Somepumpsusepackingassealinggland.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.broughtuptightsoasnottoallowanyleakageD.fittedwithareliefvalve1128Ai

rchambersareusuallyfittedtoreciprocatingpumpsinorderto______往复泵中的空气室用来保持流量稳定。A.increasedischargepressu

reB.increasesuctionvacuumC.developpulsationflowD.keepasteadyrateofflow1129Thepipefrictionandtheresistancewill______asaresultofanincreaseint

heamountoffluidflowingthroughthesystem.系统流量增加时，管路摩擦和阻力将增大。注意“rise”与“raise”之区别。A.reduceB.riseC.raiseD.fall1126C1127A1128D1

129B1130Whichofthefollowingwillbetheadvantageofacentrifugalpumpascomparedwithareciprocatingpump?①Itsdischargeiscontinuous;②Ithasnoin

ternalvalves;③Uponaccidentalclosingofdischargevalve,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.①②

B.②③C.①②③D.②only1131Whichofthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump:①reciprocating;②vane;③gear.①②③A.①o

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

ypressure.离心泵通过几个叶轮串联，可提高其排出压头。A.inseriesB.inparallelC.eitherAorBD.Noneoftheaboveistrue1133Ifanoperatingauxiliaryboilerhasaw

aterpHreadingof7,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pH值在10左右；A.bottomblowtheboilerB.treatthewaterwithcat~sticsodaC.treatthewaterwithchem

icalscavengersD.reducethewateralkalinitytorecommendedreadings1130C1131D1132A1133B1134Theinternalpartoftheboiler,iffound_____,hastobechemical

lywashedbyyard.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.shapechangedD.deformed1136Thetubeinaboilershouldbeblindediffound____锅炉管子

发现泄露，应封死。A.sealedB.informedC.leakyD.deformed1137Ina_____boilerthewaterflowsthroughtheinsideofthetubes

whilethehotgasespassaroundtheoutside.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.exhaustgasD.noneoftheabove1138Ina_____boilerthehotgases

fromthefurnacepassthroughthetubeswhilethewaterisontheoutside.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.Noneoftheaboveistree.1

139_____aremountedinpairstoprotecttheboileragainstoverpressure.锅炉安装安全阀以防锅炉超压。A.SafetyvalvesB.WatertubeC.SteamstopvalvesD.Blowdownvalves1

140Thefurnaceofaoilfiredboilershouldbe_____beforetheoperatingburnerislit.锅炉点火前，应进行扫气。“purge”意“驱气”；而“clear

ofair“清除空气”。A.filledwithwaterB.purgedC.clearedofairD.Noneoftheaboveistrue1134D1135B.1136C1137A1138B1139A1140

B1141Whensteamisbeingraisedonaboiler,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.re

mainunchangeduntiltheboilerishotenoughD.riseandfallwiththesteamdemand1142Thedonkeyboilermaybegivenabottomblow___

__锅炉熄火后，可进行下排污。A.toraisewaterlevelB.onlywhilemakingsteamC.toremovescumD.whenfirearesecured1143Thewaterlevelinasteamingauxiliaryboilerwillalway

s_____辅助锅炉的水位：降随蒸汽需求量的变化而变化。A.risewhenthesteampressureisincreasedB.remainconstantaslongasthefeedpumpoperatesC.fallwhenthesteampressureisdecrea

sedD.varyasthesteamdemandchanges1144Theboilerfeedwatercheckvalvesarelocatedonthe_____锅炉给水单向阀门位于给水管路中。A.feedpumpsuctionlineB.hotwellC.sh

ellofthefeedheaterD.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.opentheblowdownvalve1141B1142D1143D11

44D1145B1146Theboilerfeedpumpdischargepressureishigherthanthesteamdnnnpressureto_____A.ensurefeedwaterflowintot

heboilerB.keepthesteamdrumpressurehighC.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。1147Safetyvalvesonaboilerventtothe_____锅炉安全阀通大气。A.fueltankB.bilgeC.atmosphereD.auxiliaryexhausthne1148Adonkeybo

ileris_____辅锅炉即辅助性锅炉。A.onetosupplysteamtothemainpropulsionturbineB.anauxiliaryboilerC.AandBD.neitherAnorB1149Thesa

fetyvalvesshouldbetestedandadjustedwhentheboilersurveyis_____当进行锅炉检验时，应对锅炉安全阀作试验和调整。A.completedB.carriedoutC.cleane

dD.steamed1150Youshouldfrequentlycomparedram-mountedandremote-readingwaterlevelindicators._____between

thesehavecontributedtofailuresbecauseofoverheatingthroughshortageofwater,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.Deflections1146A1147C11

48B1149B1150B1151Impuritiesfromtheboilerwatersurfacecanberemovedthroughthe_____锅炉水面的杂质可通过上排污阀清除。A.safetyvalveB.bl

owdownvalveC.scumvalveD.feedcheckvalve1152Inmotorship,_____isoftenusedtorecoversomeoftheheatcarriedintheexh

austgasesfromthemainengine.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.andieseloilheaterB.awasteheatboilerC.afreshwatergeneratorD.alltheabove1153

_____willbeusedtoblowawaythecombustionproductsfromthetubesurfaces.A.TheblowdownvalveB.ThescumvalveC.TheairreleasecockD.Thesoot-blower吹灰器用来

吹除管子表面的燃烧产物。1154Latentheatchangesthe_____ofwater.潜热能改变水的物理状态。A.physicalstateB.temperatureC.atmosphericpressureD.sensiblepressure1155Theamo

untofheatreleasedbysteamwhenitchangestowateratthesametemperatureiscalled___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.latenthe

atofcondensationB.latentheatofvaporizationC.latentheatofsaturationD.sensibleheatofcondensation1151C1152B1153D1154A1155A1156Asforanoil-fired

boilerifatanormalsteamingconditionandwater1157goesoutofsightingaugeglassestheactionyoushouldtakeis:①

secureoiltofires;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-firedboiler

toomuchairwouldindicatedby_____对于烧油锅炉，空气过多，火焰呈亮白色。A.yellowishflameB.goldenyellowflameC.milkyflameD.brilliantwhiteflame1158W.H.Rstandsfor_____WHR代表

废热回收装置。A.WaterHeadRegisterB.WaterHeaterRe-circulatingC.WasteHeatRecoveryD.WasteHandleReference1159Whentheboilerloadreturnstonormal,thedrumpre

ssurewillriseandsteambubbleformationwillreduce,causingafallinwaterlevel.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.lackofwater1160Adazzlingwhiteburnerflameintheboilerfurnaceindicates_____A.nocombustionB.depositsinthefu

el见第1157题。C.excessiveairinthefuelD.coldfueloil1156A1157D1158C1159B1160C1161Thewaterlevelshowinginaboilerwatergaugeglassisusually_

___duringworking.A.higherthantheactualdrumwaterlevelB.equaltotheactualdrumwaterlevelC.increasingduetosteamcondensationinth

eglassD.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。1162Whicho

fthefollowingmayhardnessoftheboilerwatercause?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.①②and③11

63Theseparationofimpuritiesandwaterfrom_____isessentialforgoodcombustionofdieselengines.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-speedrotationinacentrifugalpurifiercanproduceaforce_____theforceofgravit

y.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.thesameasC.manythousandtimessmallerD.noneoftheabove1165_____areusedtoensure

thatshipsdon'tdischargeoilwhenpumpingoutoilywaterfromanyoilcontaminatedspace.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.Oilywatersepa

ratorD.Sewagetreatmentunit1161D1162D1163B1164A1165C1166Oilwaterseparatorsareusedtoensurethatshipsdon'tdischarge

oilwhenpumpingout_____见上题。A.ballastwaterB.boilerwaterC.bilgewaterD.sewagewater1167Thebilgemainismamlgedtodrainanywatert

ightcompartment_____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.exceptfor1168Emulsificationofoilwilloccurwhenmixe

dwith___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.anoi

lywaterseparatorB.apurifierC.acentrifugalcompressorD.aclarifier1170Acentrifugearrangedtoseparateimpurit

iesandsmallamountsofwaterfromoilisknownas____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.apurifier

C.acentrifugalcompressorD.aclarifier1166C1167B1168C1169B1170D1171Whenaclarifierisrunningtheimpuritiesandwat

ercollectatthebowl_____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.peripheryC.inletD.upperparts1172Formanyyea

rsmarinecentrifugesweredesignedfor_____operation,thatisthemachineswererunforaperiodduringwhichsolidsaccumulatedinthebowl.Themachin

ewasstoppedwhentheaccumulatedsolidsbegantoimpairitsperformance.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.temporary1173Forapurifier,changingtoagravitydiscwithlargerholediameterwillmovetheinterfacetowardsth

e___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.lowersurface1174Forapurifierchangingto

agravitydiscwithsmallerholediameterwillmovetheinterfacetowardsthe____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.l

owersurface1175Inanoilywaterseparatortheoilwilltravel_____totheoilcollectingspaces.在油水分离器中，油是向上运动到集油室的。A.upwardsB.downwardsC.outwardsD.forwards1171

B1172B1173A1174B1175A1176Whenstarted,acompleteoilywaterseparatingunitisfirstfilled_____.Theoilywater

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

withcleanwaterC.byoilywaterD.bymixedwater1177Ahighrateofseparationbetweenoilandwaterisfavoredby_____油滴尺寸大，将有助于油、水分离。A.largesizeofoilglobuleB.low

temperatureC.highviscosityD.highflowrate1178Ahydraulicmotormaybedrivenby_____液压马达是由油来驱动的。A.anelectricmotorB.adiese

lengineC.acompressorD.oil1179Inahydraulicsystem,_____areusedtoprotectthesystemfromoverpressure.在液压系统中，安全阀用来防止系统超

压。A.stopvalvesB.checkvalvesC.safetyvalvesD.reducingvalves1180_____areusedforcargohandling.回转式起货机(克令吊)可用来进行货物装卸。A.CranesB.MooringwinchesC.WindlassesD

.Foreman1176B1177A1178D1179C1180A1181Amongthebasiccategoriesofequipment,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~ngedtofail-safe,i.e.itwill_____theloadifpowerfa

ilsormachineisstopped.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.takeD.hold1184_____areusedforhaulinginorlettingoutthewireswhichfastent

heshiptotheshore.绞缆机能收进或放出缆绳。A.CargowinchesB.MooringwinchesC.WindlassesD.Cargohatches1185Thedrivemotorwillh

aveabrakearrangedtofail-safe,i.e.itwill_____theloadifpowerfailsormachineisstopped.．见第1183题。A.castB.putC.holdD.letout118

1B1182C1183D1184B1185C1186Amongthebasiccategoriesofequipment,whichofthefollowingareusedtoconvertmechanicalintohydraulicenergy7在液压系统中，

液压油泵将机械能转变为液压能。A.ThehydraulicpumpsB.ValvesC.HydrauliccylindersD.Hydraulicmotorsl187Amongthebasiccategoriesofequipment,whichofthefollowingisusedt

oconverthydraulicenergyintocontinuousrotarymotion.?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.

Hydraulicmotors1188_____areusedtolimitthepressureinanyparticularportionandmainlycontrolthepressureafterthevalve.减压阀可用

来限制压力，它主要是控制阀后的压力。A.ReliefvalvesB.CheckvalvesC.SafetyvalvesD.Reducingvalve1189Therotorofthehydraulicmotorrotatesa

taspeedproportionaltothe_____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.temperatureofoil1190Whattypeofvalvei

susedtodirecttheflowofhydraulicfluid?方向控制阀用来引导液压流体的方向。A.ReliefvalveB.DirectioncontrolvalveC.StopvalveD.Pressurecontrol

valve1186A1187D1188D1189A1190B1191Externalandinternalleakageinhydraulicsystemsmaybecausedby_____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.unusualvibr

ationB.excessivewornpartsC.abnormalpressureD.anyoftheabove1192Inageneralcargocrane,_____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.theluffingmotorC.thehoistingmotorD.noneoftheabove1193Amongthebasiccategoriesofequipment,whichofthef

ollowingareusedtoconvertthehydraulicenergyintolinearmotion?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.Hydraulicmotors1194Thesingleactingcylinderisthesimplestformwherepressureisapplied

tothefullareaofthepistonheadtomovetheloadthroughpistonrodextension.Theloadcausesrod_____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.shrinkage1191D1192B1193C1194B1195A1195Inaordinarycargocran

e,_____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.noneoftheabove1196Thecraneis

usuallymountedonapedestaltoofferadequate_____totheoperator.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.visibility1197Inageneralcar

gocrane,_____isfittedtoliftthecargoload.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.noneo

ftheabove1198Whentheunionpurchasederrickisoperated,onederrickispositionedoverthequaysideandtheotheralmostver

ticallyoverthe_____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.machineryspace1199Cargohandlingu

nitisratedaccordingtothe_____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__

___playaveryimportantpartinhydraulicsystemsbypreventingint6ractionbetweendifferentpartsofthehydrauliccircuit.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.CheckvalvesC.SafetyvalvesD.Reducingvalve1201Whichofthefollowingcanbeusedinhydraulictra

nsmissionsystem?液压系统中采用液压油。A.HydraulicoilB.AnimaloilC.LightoilD.Fueloil1202_____istheproductionofpurewaterfromseawaterbyevaporationandre-condensi

ng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.Distillation1203Whenavacuumboilingevaporat

orworks,thehotjacketwaterwillpassoverthetubestackand_____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,theremainderofseawat

erfedtotheevaporatorispumpedoutby_____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.distillatepump1205Inavacuumboili

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

eedwaterpumpD.acondensatepump1201A1202D1203C1204A1205D1206Whendistillingseawaterthecoolingwaterdischargingfromthedistill

erisfedbacktoevaporatorasfeedwater_____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.forbette

rcoolingeffectC.formoreeconomicalpurposeD.toraisevacuum1207Whendistillingsaltwaterthecoolingwaterdischargingfromthe

distillerisfedbacktoevaporatorasfeedwater_____见上题。A.tocutdowntheamountofcoolingwaterneededB.topreventanex

cessamountofcoolingwaterfrombeingdischargedtothebilgesC.tosupplyhotwatertotheevaporatorformoreeconomicaloperationD.Noneoftheabovei

stree.1208Theprocessduringwhichliquidcontainingareasonableamountofsensibleheatataparticularpressureimmediatelychangesintosteamaf

teradmittedtoachamberatalowerpressureiscalled_____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.fla

shevaporationC.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.forsta

rtingdieselenginesB.inpneumaticcontrolsystemC.inpneumatictoolsD.Alltheabovearetrue.1210Thestartingairbottleshouldbe

pumpeduptomaximumpressurebythe_____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.refri

gerationcompressorC.vacuumpumpD.purifier1211Theprimarytaskofthecompressedairsystemistodeliverthestar

tingairnecessaryfor_____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.startingtheemergencyelectricalternatorC.drivingthemainturbineD.drivingth

eturbocharger1212TheevaporatingpressureinR22vaporcompressionrefrigerationplantshouldbe_____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.muchlargerthan1213Hotgasdefrostingusesthehotgasfrom_____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.boilersD.refrigerationcompressors1209D1210A1211A1212B1213D1214Inarefrigerationpla

ntthe_____needdefrosting.在制冷装置中，蒸发器最易结霜，需要化霜。A.fanB.compressorC.condenserD.evaporator1215Whatisthesubstancec

alledwhichcanreadilybeconvertedfromaliquidintoavapor,andalsofromavaporintoliquidwithareasonablynarrowrangeofpressure?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.Brine1216Afluidcoilwill_____largequanti

tiesofheatwhenitchangesstatefromaliquidtoavapor.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.regenerate12

17AfluidcoilWill_____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)。12

19A.releaseB.absorbC.developD.regenerate1218Thelatentheatofevaporationisdissipatedinthe_____inacompression

refrigerationsystem.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.compressor1214

D1215B1216B1217A1218B1219Arefrigerantboilsandvaporizesinthe_____inacompressionrefrigerationsystem.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.coolingcoil1220Arefrigerantgivesupheatwhenitgoesthrough当制冷剂经过冷凝器时释放热量。A.condenser

B.regurgitateC.evaporatorD.boilcoil1221Itshouldbeensuredthatonly_____vaporishandledbytherefrigerationcompressor.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,theexces

svaporwillaccumulateintheevaporator,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.f

allC.bemaintainedconstantD.Noneoftheaboveistrue.1224Ifthecapacityoftherefrigerationcompressoristoolarge,thesaturationtemperaturewill_____如果制冷压缩机的容量太大

，饱和温度将下降。A.riseB.fallC.bemaintainedconstantD.Noneoftheabove.1219D1220A1221B1222A1223A1224B1225Intheprocessof_____,liquidchangesintogas.在蒸发过程

中，液体变成气体。A.evaporationB.frostingC.condensingD.compressing1226Sinceheatwillnotflowfreelyfromabodyata_____temperaturetoanotherata

_____temperature,itisnecessarytoexpendmechanicalwork,heat,orelectricalenergyfromanexternalsourcetoachieverefr

igeration.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/deeperC.larger/smallerD.higher/lower1227Inacompressionrefr

igerationplanttherefrigerantflowsfromtheexpansionvalveandthroughthe_____whereitabsorbsheatfromthespacebeingcooledandbecomesag

asorvapor.．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.evaporator1

228The_____compressoranditselectricalmotorareentirelyhousedinagas-tightcasing.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.latenth

eatofvaporizationC.specificheatofvaporizationD.latentheatofthegas1230Boththetemperatureandthepressureoftherefrigerantareincreasedinthe_____1

231在制冷压缩机中，制冷剂的温度和压力都升高。1232A.compressorB.condenserC.evaporatorD.expansionvalve12331225A1226A1227D1998B1999B

1230A1931Thecompressorsuctionlineconveystherefrigerantvaporfrom_____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/e

vaporatorB.evaporator/compressorC.compressor/condenserD.Noneoftheabove.1232Thethermalexpansionvalvecontrolstheamountofrefrigera

ntthatisallowedtoflowtothe_____热力膨胀阀用来控制流向冷却盘管的制冷剂量。A.compressorB.coolingcoilsC.condenserD.receiver1233Whenthetemperatureoft

herefrigerantflowingoutfromthecondenserisbelowthecondensingtemperature,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.either

allthewayopenorallthewayclosedB.normallyfullyopenC.throttleddependingonloadD.controlledbyliquefiedpressure1235Theexpansionvalveo

naFreonsystemcontrolsthe_____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.backpressureintheevaporatorC.temperatur

eoftheiceboxD.superheatofthegasleavingtheevaporator1231B1232B1233C1234C1235D1236Afeelerorthermalbulbisusedfortheexpansionvalveto_____热力膨胀阀中，使用

温包来检测温度。A.detectthetemperatureB.detectthepressureC.heattherefrigerantD.acceleratetherefrigerant1237Inacompressionrefrigerat

ionplanttherefrigerantisunderlowpressureintheandunderhighpressureinthe_____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/co

ndenserB.condenser/evaporatorC.throttlevalve/evaporatorD.evaporator/condenser1238Theboilingandcondensationpointsofr

efrigerantmainlydependonthe_____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.pressure1239Thefu

nctionof_____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_____thatrequiredintheevaporatorrefrigerated

space.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.1236A1237D1238D1239B1240B1241Afterpassingthroug

htheexpansionvalvetherefrigerantshouldbeinthestateof_____经过热力膨胀阀后，制冷剂应该是气、液混合物，A.vaporB.liquidC.solidD.Noneoftheaboveistree.1242Therefrigerantf

lowsthroughtheevaporator,whereit_____heatfromtherefrigeratedspace.当制冷剂经过蒸发器时，从被冷却空间吸收热量。A.extractsB.releasesC.givesnoD.absorbsno1243Inpractic

e,therefrigerantflowaftertheevaporatorisdesignedtoensurethatthevaporleavingtheevaporatorisslightly___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.superheated1244Whichofthefollowingwillbedesirablepropertiesofref

rigerant?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;③thatitdoesn'treactwithlubricantsA.①②a

nd③B.①and②C.①and③D.②and③1245Inthe_____refrigerationcompressoroneendofthecrankshaftextendsthroughthecrankcasehouseforconnection,viaaco

uplingorpulley,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,highpressurerefrigerantgasiscooledbytheseawaterandbecome

sliquidinthe_____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.evaporator1247Whatisthefunction

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

lingpressureC.forcontrollingsuperheatD.forcontrollingthesolenoidvalve1248Inavaporcompressionrefrigerationtheevaporatingpressureismaintainedcons

tantbytheactionofthe_____,whichremovesvaporfromtheevaporatoratthesamerateatwhichitisformed.在压缩式制冷装置中，蒸发压力是由压缩机来维持。A.evaporator

B.compressorC.condenserD.noneoftheabove1249Thedeviceusedforlow-pressurecontrolandhigh-pressurecutoutonacompressorisca

lleda_____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.pressurecontrollerD.cutoutswitch1250Whichofthefollowin

gmaycausethatthecompressorcutsoffonhighpressurecutoutinarefrigerationplant?①faultycondensing;②toofewrefrige

rant;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.anyof①)and②C.anyof②and③I).anyof①②and③125112

46B1247C1248B1249C1250A1251Whichofthefollowingmaycausethatexcessivelywarmwaterleavesthecondenserinarefrigera

tionplant?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.anyof①and②1252Thepresenceofairinthecondenserofarefrigerationsystemwill____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.Noneoftheaboveistrue.1253Whichofthefollowingbestdescribes"

overchargeofrefrigerant"?“制冷剂充注过多”即“制冷剂太多”。A.Toomuchrefrigerant.B.Toolittlerefrigerant.C.Refrigerantisranout.D.Runningisover.1254What

separatethehighpressuresidefromthelowpressuresidein1255arefrigerationsystem.?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.

Kingandsolenoidvalves.C.Compressorandthermalexpansionvalve.D.Condenserandsolenoidvalve.1255Afterfittingbackinplacethegearwheels,don'tf

orgetto_____them.把齿轮装回原地后，不要忘了给它们加油。A.fulfillB.eliminateC.greaseD.bend1251C1252A1253A1254C1255C1256Thede

fectiveplacesinthefurnace____withfirebricks.A.shouldbepavedB.shouldbecleaned炉膛损坏处，应用火砖砌。C.shouldbedismantledD.shouldbewelded1257Thede

signed____is20tonsperday,butthefreshwatergeneratorcanonlydistil15tonsatpresent.造水机设计容量是每天20t，但目前每天只能蒸馏15t，A.displacementB.weightC.p

owerD.capacity1258The____ofthegravitydiscistoobig.Itcauseoiltoflowthroughthewateroutlet.Wechangedthediscandnooilisfoundinthewateroutlet.分油

机比重环直径过大会引起“跑油”。A.gravityB.diameterC.circumferenceD.cylinder1259Waterlevelcontrollersoftheboilermustbekeptoperabletoprotectexternal1260

steam-usingplantfromwater"____"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.carryover1260Theshaftandspareparts____shou

ldbewellgreasedinordertoavoidcorrosion.A.inthestoreroomB.inthecylinder物料间的备件应上油以防腐蚀。C.inthescavengeairboxD.inthewa

terbox1261Ifabilgepumpfailedtobuildupdischargepressure,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.excessivew

aterinthebilgesB.acloggedsuctionstrainerC.oilinthebilgesD.Alloftheabove1256A1257D1258B1259D1260A1261B1262Blacksmokecomingfro

maboilercanbecausedby____1263锅炉油温太低会使排气冒黑烟。A.lowwaterlevelB.highwaterlevelC.excessivelyhighfuelpressureD.lowoiltemperature1263Mois

tureshouldbekeptoutofanR-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.embrittlementofsomep

artsoftheautomaticcontrolsC.sludgeinthelubricatingoilD.alloftheabove1264Airthatmayenterarefrigerationplanttendstocollectinthe____进入到制冷装置的空气积聚在冷凝器的上

半部分。A.upperpartofthereceiverB.upperpartofthecondenserC.downstreamendofthecoolingcoilD.outletendofthecondenser1265Insufficientrefrigerantinar

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

C.hightemperatureoftheoverboardwaterD.lowsuctionpressureofcompressor1262D1263D1264B1265D1266Whichwillcausethehighpress~recutoutt

ostopthecompressorinaR-22system7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.Exces

sivefrostontheevaporatorD.Notenoughcondensercoolingwater1267Blacksmokecomingfromaboilercanbecausedby

____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/fuelratio1268Aruptureddiaphragmin

athermostaticexpansionvalvewillcausethevalveto____如果热力膨胀阀的膜片破裂，膨胀阀将关闭A.openB.closeC.remaininitspositionD.floodtheevaporatorwithrefrigerant1269W

hichofthefollowingshouldberecordedinOilRecordBookPartI(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.Nonautomaticdischargeoverboardofmachineryspacebilgewater.B.Automaticdischargeoverboardofmachineryspacebilgewater.C

.AandB.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.1266D1267D1268B1269C1270B1271Thethirdengineertookthe

____andcheckedthetanktableintheof-ficeandrecordedallrelevantdata,aswellascalculatedthebunkering.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'strim1272Dirtyoilmustbe____beforebeingusedagain.脏油再次使用前必须经过净化A.mixedwith

cleanoilB.purifiedC.heatedD.strained1273Theemergencybilgesuctionorbilgeinjectionvalveisusedtoprevent____ofthe

ship.应急舱底水吸口用来防止船舶淹水A.proceedingB.overloadingC.collisionD.flooding1274Allbilgesuctionsmustbefittedwithsuitable____,whichinthemachineryspacewould

bemudboxespositionedatfloorplatelevelforeasyaccess.所有舱底水吸口一般都装设滤器(除应急舱底水吸口外)A.strangersB.reliefvalvesC.emergencyvalvesD.strainers1275Whi

chofthefollowingisNOTonthelistitemstoberecordedinOilRecordBookPartI(machineryspaceoperation)?“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.QuantityofwaterproducedbyF.W.G

.D.Dischargeofdirtyballastorcleaningwaterfromfueloiltanks.1271D1272B1273D1274D1275C1276Whichofthefollowinginfluencesthepositionoftheinterfacebetwe

entheliquidsealandtheoilinapurifier?比重环影响分油机中油、水之间的界面A.HeightofthemachineB.TemperatureoftheliquidsealC.Gravit

ydiscD.Bowldiameter1277ForaL.O.purifier,Ifthebackpressureoftheoiloutletistoohigh,theinterfacebetweenoilandwaterintheb

owlwill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.movedownwardsD.retainoriginalposition1278Wheninoperation,itisuna

voidablethatasmallamountofoil____throughleak-age,andinordertocompensatefortheseleaksthesystemisconnectedtoafeedpump.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.accelerates;1279Coalescenceisthebreakdownofsurfacetensionbetweenoildropletsinanoil/watermixture,whichc

ausesthemtojoinand____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.decrease1276C1277C1278A1279C1280Whichofthefollowingc

hemicalswillbeusedwhereprotectionagainstcaustic1281crackingisrequiredinboilertreatment?锅炉炉水处理中，使用硝酸钠来防止苛性脆化A.SodiumhydroxideB.Sodiumcarbonate

C.SodiumnitrateD.Sodiumpolyphosphate1281Themainsteeringgearmustbeabletosteertheshipatmaximumaheadservicespeedandbecapableatthisspeed,anda

ttheship'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

steeringgearmustbecapableofbeingbroughtspeedilyintooperationandbeabletoputtherudderoverfrom15degreesononesideto15degrees

ontheothersideinnomorethan____withtheshipatitsdeepestservicedraughtandnmningaheadatthegreaterofonehalfofthemax

imumservicespeedor____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/14knots1280C1281A1282C1283Specialthrustdevicesareprovidedonshipstoimprovetheir____atzeroshipspeedwhentherudder

isrelativelyineffective.船舶侧推器可提高船舶的机动性能A.brakecapabilitiesB.reversingcapabilitiesC.maneuveringcapabilitiesD.accelerationcapabilities1284Thetempera

ture____aliquidchangesitsstatefromliquidtogasdependsupontheliquiditselfanduponthepressure____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”；“besubiectedto”意“承受”，“tO”放于定语从句引导词“which”之前。A.a

twhich/towhichB.fromwhich/atwhichC.towhich/fromwhichD.inwhich/onwhich1285WhenmakingentriesintheOilRecordBook,thedate,operationa

lcodeanditemnumbershallbeinsertedintheappropriatecolumnandtherequiredparticularsshallberecorded____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_

___shallbeprovidedtoeveryoiltankerof150tonsgrosstonnageandabovetorecordrelevantmachineryspaceandcargo/bal

lastoperations.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.OilRecordBookPart

IIC.OilRecordBookPartIorPartIID.OilRecordBookPartIandPartIIanditsmaincontentis1283C1284A1285C1286D1287ThecoreitemintheOil

RecordBookPartIis____《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/BAHASTOR(21,EANINGOFFUELOILTANKSB.itemB/DISCHARGEOFDIRTYBAIJASTORC

I,EANINGWATERFROMFUELOil.TANKSREFERREDTOUNDERSECTION(A)C.itemC/DISPOSALOFOILRESIDUES(SLUDGE)D.itemH/BUNKERINGOFF

UELOILS1288Accordingtotheinternationalregulationsconcerningthepreventionofpollutionofseaareasfromships,thedisposalintotheseaofallpl

asticsis____MARPOL公约规定，一切塑料制品禁止倾倒人海A.welcomeB.admittedinsomespecialseaareasC.prohibitedD.acceptable1289Ifyoumustenteraroomorcompartmenttoc

ombatthefire,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.closes1290Uponthecompletionof

requiredtests,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.cover1287C1288C1289A1290C1291____,i.e.asteamcooler,mayberifledintheboilersystemtocontrolthesuper

heatedsteamtemperature.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-comertube1292Airconditionin

gistheprocessoftreatingairtocontrol____itstemperature,humidity,cleanlinessanddistributiontomeetthecomfort

requirementsoftheoccupantsoftheconditionedspace.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.simultaneously1293Oneofthefunctionsofventilationisto____thehumidityofspacescontainingsourcesofmoisture,orto____thete

mperatureofspacesnotmechanicallycooledsuchastheengineroom.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____isthecontroloftemperatureandhumidityinaspacetogetherwiththecir-cu

lation,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.Heating1291B12

92D1293D1294B1295____isthecirculationandrefreshingoftheairinaspacewithoutnecessarilyachangeoftemperature.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.Heating1296Ifliquidrefrigerantaccidentallycomesincontactwitht

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

olutionD.obtainmedicalhelp1297.Shouldapersonbeovercomeduetolackofoxygenandhighconcentrationofrefrigerant,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.artificialrespiration1298Steeringgeamcanbearrangedwith

hydrauliccontrolequitm~ntknownasa"____",orwithelectricalcontrolequipment:.舵机系统装有液压遥控马达或电力控制设备A.teleme

terB.telemanometerC.telemotorD.telemometer1295C1296D1297D1298C1299WhichofthefollowingoperationsneedNOTtobeenteredonthe1300OilRecordBookPartI?①Rout

inedischargeatseaofbilgewatercontainingoilfromthemachineryspacesthroughstrainers;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.neither①and②1300WhichofthefollowingoperationsneedNOTtobeenteredontheOilRecordBookPartI

?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?①Cleaningof

fueloiltanks;②Internaltransferoffueloil“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.neither①and②1302Whichofthefollowingop

erationsneedtobeenteredontheOilRecordBookPartI?①Ballast.offueloil,tanks;②Conditionofoildischargemonitoringandcontrol

system.“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.neither①and②1299D1300B1301A1302C1303Astheairp

assesthroughthechargeaircooler,itstemperaturemaybereducedand1304moisturecondensed,withthecondensateindangerofbeingcarriedintotheengine.Soawat

erseparatorshouldbemountedbeneaththebottompartoftheengineinletmanifold.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.keeptheai

rfrombeingcarried,intotheengineB.keepthemoisturefrombeingcondensedC.keepthedangerfrombeingcarriedintotheengineD.take

awaythecondensatefromtheair1304Withreferencetoatworamactuatingmechanism,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.Theramsworkinsidecylinders.B.Thecylindershaveglandssealingtheiropenends.C.Theramsareconnectedtoacross-head.D.

Thecross-headismountedontheredderstock.1305Withreferencetoanaxialpiston: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.Thecylindricalbarreliscoupledtothemotor.B.Thecylindricalbarrelhas~anoddnumberofbores.C.Theboresendinsocket

s.D.Thesocketsfitintheswashplate.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.Eachboreisfi

ttedwithaweJl-lappedplunger.D.Therearealwaysevennumbersofbores.1307Withreferencetooperatingafour-mmsteeringgearsystemunderemergencycondition

s,whichoneofthefollowingstatementsisincorrect?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.th

enormal.C.Watchkeepingofthesteeringgear,sh~dbeincreased.D.Limitationsofthesteeringgearshouldbeloggedbutthebridgeneednotbeinf

ormed.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.Itisrequiredthatallshipsareprovided:withtwoindependentsteeringgearsystemsthatisonemainandoneauxiliar

y.B.Theattxil~gearcouldbepoweroperatedinpassengerships.C.Theauxiliarygearmustbeofadequatestrengthandsufficienttosteerashipatnavigable

speedD.Allmovingpartsofthesteeringgearmustbeguardedagainstanypossibledamage.1306D1307D1308B1309Withreferencetoamtm3rvanesteeringgea

rsystem,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.Thethreemovingvanesandthethree

fixedvanesformthree,pressurechambers:.B.Thethreemovingvanesandthethreefixedvanesformsixpressurechambers.C.Thethreemo

vingvanesandthethreefixedvanesformnineprman'echambers.D.Thethreemovingvanesandthethreefixedvanesformtwelve~chambers.1310Largepipesordown-comersa

refittedbetweenthesteamdramand____toensuregoodnaturalcirculationofwater.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.wate

rwall1311Whenacentrifugeisarrangedtoseparateimpuritiesandsmallamountofwaterfromoil,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.clarifier1312Toppingwiresfixtheheightofthederricksand____tothedeckmaybeusedtopre

ventforeandaftmovement.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____uniti

smountedsoastoraiseandlowerthecablefromthespurlingpipe,whichisatthe~topandcenterofthec~orcablelocker.,1313．锚链轮装置

用于从锚链管中升、降锚链。A.ThecablelifterB.hoistingmotorC.ThetoppingwireD.Thefife-raft1314____ordramisusedforhaulinginorlettingoutthewiresor.~whichwil

lfastentheshiptotheshore1314．绞缆卷筒用于收进或放出缆绳。.A.ThewinchmotorB.ThebandbrakeC.ThewinchbarrelD.Theanchorcapstan1315Excessivelywarmwaterleav

ingcondensermaybecausedby____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.toolittleortoowarmcondenserwaterC.airornon-conden

sablegasinsystemD.overchargeofrefrigerant1316Tworamsofthehydraulicgeararelinkedattheirouterendsto____byacrossheadand:swive

lblock.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~themovingtillerwillbringthefloat

ingleverpivotandtheleverintotheatrightanglestothescrewshaftaxis.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-h

eadD.Adrivinggear1313A1314C1315B1316B1317A1318____systemisarrangedtoensurethatwatercanbedrawnfromanytankortheseaand~dischargedtoanyo

thertankortheseaasrequiredtotrimthevessel.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.Thedomesticwate

rB.BilgewaterC.OiltransferD.Theballast1319Largepipesor____arefittedbetweenthesteamandwaterdrumstoensuregoodnaturalcirculationofwater.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.soot~blowers1320Thewaterlevelinthegaugeg

lasswhenaboilerisoperatingis____whentheboilerisshutdown.1320．锅炉运行时，水位表中水位比停炉时的要高。A.;lowerthanB,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~evaporatorissuppliedfordrinkingpurpose,itmustbetreatedtoensureiti

sbiologicallypureand____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.slightlyacidicB.slightlyalkalineC.nosaltyD.slightlybitter1318D1319C1320B1321

D1322B1323____providestheheadorpressuretosupplythedomesticwaterwhererequired.日用水系统中常采用压缩空气提供压头，确保供水。A.Thec

ompressedairB.ThecompressingairC.ThetransferpumpD.Theheadtank1324maybefittedforoperatingthederricktopp

inglift(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.A

mooringdrum1325The____isusedforhaulinginorlettingoutthewiresorropes.1325，绞缆卷筒用于收进或放出缆绳。A.windlassB.anchor

capstanC.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,____forliftin

gtheload.1327．克令吊中，提升装置用来提升货物。A.ahoistingmotorB.aluffingmotorC.amooringmotorD.aslewingmotor1328Theenginefueloilsystemshouldbeprimedbyusing

____,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.theh

ydraulicpumpD.injectorpump1323A1324C1325D1326B1327A1328A1329Domesticwaterpumpisstartedautomaticallyby____whichoperatesasthewaterlevelfallstoapred

eterminedlevel.日用水泵是由压力开关自动启动。A.alevelcontrollerB.atemperatureswitchC.apressureswitchD.afloatingball1330____isarrangedforcleaningthelubricat

ingoilintimsystemandcleanoilcanbeprovidedfromastoragetank.1330．离心式分油机用来清洁系统中的滑油。A.AfilterB.AcentrifugeC.AdistillerD.Agenerator1331Thepumpsemp

loyedonboardshipcanbedividedintotwomaincategories,i.e.pumpsandcentrifugalpumps.1331．泵可以分为两大类：容积式泵和离心泵。A.gearB.

non-positivedisplacementC.positivedisplacementD.rotary1332Inacompleteoil/waterseparator,moreoilwillseparateoutontotheunderside

oftheseplatesandtraveloutwardsuntilitisfreetoriseintotheoilcollectingspace.What'sthemeaningof"it"inthesentenceabove?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.anoilcollectingspace1333Undercentrifugalpumpsarethevolut

e,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.vane1

329C1330B1331C1332B1333C1334Ingeneral,____issuitablefordeliveringsmallquantitiesathighpressure.一般地说，往复泵适用于低排量、高压头的场合。A.reciprocatingpump

B.gearpumpC.centrifugalpumpD.vanepump1335Inapurifier,theinterfacebetweentheliquidsealandtheoilshouldbepositionedascloseaspossibleto____1335．在分水机中，油水

界面应尽可能地靠近分离筒的四周。A.theoutletofoilB.theoutletofwaterC.thebowlperipheryD.thecenterofbowl1336Bottomblowvalvesar

einstalledonauxiliarywater-tubeboilersto____1336．辅助水管锅炉安装下排污阀用于清除锅炉给水中脏物。A.removesuspendedandprecipitatedsolidsfromtheboilerwate

rB.completelydraintheboilerinanemergencysituationC.preventhardenedscaledepositsinthewaterdnnn...D.removefloatingimpuritiesfromtheoilywater

surface1337Oilwaterseparatorsareusedtoensurethatshipsdon'tdischargeoilwhen____bilgewater.1337．“whenpumpingoutbilgewater

”是现在分词短语，作状语。A.topumpoffB.beingpumpedC.pumpingoutD.itpumpingout1338Additionalheatextractionfromtheexhaustgasescanbeeffectedbyaddi

ngan____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.airblower1334A1335C1336A1337C1338

B1339Ifaheavyseastrikestheredder,theshockistransmittedthrough____totherams,thiscauseasuddenincreaseinoilpressureinoneofthe

cylinders.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.thetillerann1340Thecontrolrodofasteeringgearpumpisattachedatits

outerendto____1340．舵机泵的控制杆外端与追随机构相连。A.thehuntinggearB.therudderstockC.thereddercontrollerD.thefeedbackunit1341Wheretanksarearrangedforeitheroilor

ballast____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.anaircoo

ler1342~hecontrolspindleoperatestheslipperringor____ofthevariablede-liverypump,whichcontrolsthesuctionanddischargeoftheoil.1342．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____isusedforsensingthetemperatureoftheroomintheairconditionsystem.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.Acondenser1339D1340A1341A1342B1343C1344Accordingtothewaythesteeringgearisope

rated,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.hydraulicsteeringB.follow-upsteering

C.remotecontrolsteeringD.aircontrolledsteering1345Thevariouspumpsandlinesare____tosomeextentsothateachpumpcanacta

sanalternativeforanother.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.interacted1346_____aremoresuitableforlargequan

titiesatlowpressure.离心泵适用于大排量，低压头场合。A.ReciprocatingpumpsB.RotarypumpsC.CentrifugalpumpsD.Gear1347Gearpumpsare____typebecausetheydischarg

eanearconstantamountofliquidregardlessofpressure.1347．齿轮泵是容积式泵。A.positivedisplacementB.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.highpressure

1349In____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.centrifugal1350Theemergen

cybilgesuctionorbilge____isusedtopreventfloodingoftheship.1350．应急舱底水吸口用来防止船舶淹水。A.injectionvalveB.reliefvalveC.dischargeval

veD.inletfilter1351Centrifugalpumpsarepopularbecausetheyareverysimplein:construction,andproducesmooth,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-positive1352____isthebreakdownofsurfacetensionbetweenoildroplets~inanoilwatermi

xturewhichcausesthemtojoinandincreaseinsize.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.Coarseseparating1348A134

9D1350A1351A1352C1353Theremovalof____fromlubricatingoilwillreduceenginewearandpossiblebreakdowns.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.contaminatedfuelD.contaminatingimpurities1354____isusedforwashinganddrinking

.1354．日用水系统用于盥洗和饮用了A.TheballastsystemB.ThesaltwatersystemC.ThebilgesystemD.Thedomesticsystem1355Thepositionoftheinterfacebetweenoilan

dwaterwithinthecentrifugeisachievedbytheuseof1355．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.mainsealingring135

6Ifaheavyseastrikesthe____,theshockistransmittedthroughthetillertotherains.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.stabiliser1353D1354D1355A1356B1357Nospecificperiodisgivenfortherenewalofthelubricatingoilfilter

elementasthisshouldbedone____afigureof0.7barsisshownonthegauge.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.whe

neverC.whereverD.whoever1358Tostarttheejectionprocesstheoilfeedtothecentrifugeisfirstshutoffandtheoilr

emaininginthebowlremovedbyadmitting____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.flushingwater

D.sealingwater1359Theinterfacebetweentheliquidseal(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.CompressorB.SeparatorC.EvaporatorD.Fuelpump1361Theyunderstandthe____ofautomaticsludgedischarging

ofthepurifier.Buttheyarenotgoodinpractice.1361．他们明白分油机自动排污原理A.principleB.principalC.theoryD.ease1357B1358C1359C1360B1361A1362He

resomeoilintheoilywaterseparator,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.temperatureB.viscosityC.densityD.velocity1363Thediameterofthegravitydiscistoobig,Itcausesoiltof

lowthroughthewateroutlet.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.ridge13

64Sealinginpumpshaftisachievedbymeansofthe____1364。泵轴的密封是通过填料来实现的。A.gasketB.packingC.washerD.spring1365Centrifugalpumps,however,canbedesignedwitha

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

gether1362C1363B1364B1365B1366Allbilgesuctionmustbefittedthesuitable____,whichinthemachineryspacedbe:mudboxespositionedatfloor-platelevelforeasyac

cess.所有舱底水吸口应装设滤器。A.strainersB.valvesC.elementsD.separators1367Impuritiesfromtheboilerwatersurface:~canberemovedthroughthe1367．锅炉水面的杂质可通过上排污阀排除。A.saf

etyvalveB.blowclownvalveC.scumvalveD.feedcheckvalve1368Theexhaustboilersareusedtorecoversomeof____carriedintheexhaustgasf

romthemainengine.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____withfirebr

icks.1369．炉膛损坏处应用火砖砌。A.pavedB.cleanedC.weldedD.dismantled1370Thesafetyvalvesaremountedinpairsto____theboileragainstoverpressure.1370．锅炉安全阀用来防止锅炉超压

A.useB.releaseC.protectD.effect1366A1367C1368C1369A1370C1371Thesafetyvalveshouldbe____inthepresenceofC/EandSurveyor.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.unscrewed1372Betweenthesteamdrumandthesmallerwaterdrumbelow,largenumbe

rsofsmallerdiameter____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.downcomer13

73A____boilerisanauxiliaryboilersome~includedinasteamship'sinstallationforsupplyingsteamtoauxiliariesinport.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.main1374Waterevaporatesorsteamcondensesatthesaturationtemperature,whichdepen

dsuponthepressure,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.thehighest1375Thesootblowersareoperatingintheoilfuelboilertheair/fuelratiomust____t

hroughouttheaction,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.beincreasedB.bedecreasedC.remainconsta

ntD.eitherbeincreasedorremainconstant1371B1372C1373B1374B1375A1376Atnormalseagoing,weuse____insteadofdonkeyboiler.在海上航行时，使用废气锅炉来代替辅助锅炉。A.ah

eaterB.apre-~heaterC.anexhaustgasboilerD.thecoalburningbo'der1377Theinternalpartof,boilershouldbecleanedbyyardiffound.____1377．锅炉内侧发现水垢，应进行清洁。A.sc

aledB.wornC.deformedD.rusted1378Theoil____inthedischargingwaterfromoilwaterseparatorexceeds15PPMwithoutalarm,b

ecausethecoilwasburntout.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.content1379The

remainingoil/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.Inthesentence"H.P."means1380。使用高压牛

枪给滚株轴承加牛油：A.horsepowerB.highpressurecompressorC.handpumpD.highpressure1376C1377A1378D1379A1380D1381Anchor____areusedinsome.installationswheret

hecablelifterrotatesaboutaverticalaxis.1382在一些装置中，使用锚绞盘，锚链轮绕立轴旋转。1383A.windlassesB.drumsC.capstansD.warpends13841382Priortorunningthehydraulicpu

mp,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.closure13871383Anchorcapstansareusedinsomeinstallationwherethecablelifterrotatesabouta____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,theshockistran

smittedthroughthetillerto____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.huntinggearsD.therams13931385The

handsteeringisamethodbywhichthemotionoftherudderiscontrolledwith____13941385．手动舵，即舵的运动是由手动驱动的舵轮来控制。1395A.amotor-drivensteering

wheelB.apneumaticsteeringwheel1396C.ahand-drivensteeringwheelD.anelectricsteeringwheel1386Theseincludedeckmachinerysuch~smooringequi

pment,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.hatchcovers1387Awarpendmaybefittedf

oroperatingthederricktoppingwirewhichadjuststhederrick____1387．吊杆式起货机中，卷绕端用来操作吊杆的顶索。A.lengthB.slackC.heightD.~rotati

ondirection1388Inageneralcargocrane,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/luffi

ng/slewingB.lifting/raising/loweringC.rotating/raising/handlingD.hosting/lowering/moving1389Foroccasionalheavyloads,

twocranescanbearrangedtoworktogetherTheoperatingfordeckcranemotorsmaybehydraulicelectric.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.voltage1386D1387C1388A1389B1390Inthecargowinch,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.theboardbrakeC.thefail-safeD.thebarrelshaft1391Theinnerpartofthecondensershouldbe

cleanedwith____1391。冷凝器的内侧应用化学剂清洁。A.gasoilB.dieseloilC.chemicalcompoundD.Freon-121392Theshutteroftheevaporatorwasblockedwith____itmeanstherewasto

omuchevaporation.1392．蒸发器的格栅被冰堵塞了，表明蒸发过度A.iceB.woodenboardC.ironplateD.cottonwaste1393Thequantityofcooledairdeliveredbyanaircondit

ioningunitshould____thesumofthequantityofairre-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.bala

nceB.notbalanceC.bemorethanD.belessthan1394Freon12whichisusedtoproduceintensecoldisnormallya____whenatatmosphericpressureandtemperature.1394．制冷剂

R12在大气温度和压力下是一种气体。A.liquidB.gasC.solidD.wateronly1390D1391C1392A1393A1394B1395Astherefrigerantpassesthroughthe~valv

eorifice,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.oilymixtureC.emulsionD.vapor1396Becausetheex

pansionvalveisjust____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____atlowtemperatureintheevaporator.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.sampl

esC.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.p

ressureC.velocityD.heat1400Inthecondenser,thehot,hi~pressurerefrigerantgasiscooledbytheseawaterandbecomes____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.liquid1395D1396C1397B1398A1399B1400D1401Weuse____todistillfreshwaterfromseawater

.使用造水机，从海水中蒸馏淡水。A.engineB.seawaterpumpC.cylindercoolerD.freshwatergenerator1402Becauseofthereduced____inthevacuumboilingevaporator,someof

theseawaterboilsasitflowsthroughthetubes.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.rateofflow1403Thefreshwater

generatorproducesfreshwater____1403．造水机通过海水的蒸发来产生淡水。A.bycoolingseawaterB.byheatingseawaterC.byevaporationofseawaterD.bypurifyingsea

water1404Cleanoilisachievedinaclarifierbowlwheretheimpuritiesandwatercollectatthebowl____1404．在分油机中，杂质和水都积聚在分离筒的四周。A.bottomB.topC.centerD.per

iphery1405Thedesignedcapacityis25tonsaday,: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.r

unD.operate1401D1402C1403C1404D1405B1406Intheprocessof____,liquidchangesintogas.在蒸发过程中，液体变成气体。A.evaporat

ionB.frostingC.condensingD.compressing1407Morethanonestageofevaporationcantakeplacebyadmittingtheseawaterintochamberswithprogressively__

__pressureinth~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.thehigher1408Youmusttakegood

careofthedrainagecockoftheaircontrolsystem.Because____leadsscaleformedwhichmightmalfunctionsthepilotcontrolvalveandotherinstruments.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____bec

ausetheydischargeanearconstantamountofliquidregardlessofpressure.1410．齿轮泵是容积式泵A.negativedisplacementtypeB.turbinetypeC.positivedisplaceme

nttypeD.mixed-flowtype1406A1407A1408D!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____.141

2．油分浓度监测器用来监测水中的含油浓度。A.theoilcontentinwaterB.thewatercontentinfueloilC.thewaterlevelinbilgewellD.theo

illevelinbilgewell1413OilRecordBookPartIshallbeprovidedtoeveryoiltankerof150tonsgrosstonnageandaboveandeveryshipof400tonsgrosstonnageandabove,____oi

ltankers,torecordrelevantmachineryspaceoperations.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.ratherthanD.otherthan1414Thebilgemainisarrangedtodrainanywatertightcompartment____ballast,oilorwatertanksandtodisc

hargethecontentsoverboard1414．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.exceptf

or1415Ifoildensityweregreaterthanwater's,theoilseparator____1415．如果油的密度比水大，分油机便不能工作A.didworkB.wouldworkwellC.didn't

workD.wouldn'twork1411A1412A1413D1414B1415D1416Oilwaterseparatorsareusedtoensurethatshipsdon'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.sewagewater1417Ahydraulicmachineisonethatuses____todowork.]417．液压设备是使用液体做功的设备。A.liquidB.st

eamC.gasD.electricity1418Inavacuumdistillationsystem,thecaseisthehigherthepressure,____1418．在真空蒸馏系统中，压力越高，饱和温度也就越高。A.thesaturationtemperatureishig

herB.thehigherthesaturationtemperatureC.thehigheristhe:saturationtemperatureD.thesaturationtemperatureismorehigh1419Beca

useofthereduced____inthedistillationsystem,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.volume1416C1417A1418B1419A1420Inextremeweatherconditions,eitherhotorcold,controlofthea

irconditioningplantpresents____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.les

s1421Mostairconditioningunitshave____foradjustingtheratioofrecirculatedfreshair.Caremustbetakennottoreducethefreshairsothatstuffinessors

mellsarise.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.catchplatesB.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.th

efasteritwillevaporateB.thesloweritwillcondenseC.thesloweritwillevaporateD.thefasteritwillflow1424Whereanex

cessivelevelofcontaminationisdetectedanalarmissoundedanddivertingvalvesareoperated.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.overboardB.abilgewellC.asloptankD.ahotwell1420A1421B1422A1423C1424C1425When

aboilerisoperating,thewaterlevelinthegaugeglassreads____whentheboilerisshutdown.锅炉运行时，水位表中水位比停炉时的要高。A.lowertha

nB.higherthanC.asmuchasD.thesameas1426Strainersandfinefiltersshouldbecleanedatintervals,____preventdirtfromgettingunderafuelinjectionpu

mpvalve.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.inadditionto1427Thefinefilterswillbearra

nged____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____,hot

dieselenginejacketwaterpassesoverthestackandheatstheseawaterpassingthroughthetubes.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.aboiler1425B1426B1427C1428C1429Inanoilcoolercircul

atedbyseawater,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.ons

idesofbowlC.indrainlineonthediscsD.onthediscs1431The____dischargeanearlyconstantamountofliquidregardlessofpressu

re.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,andvan

epumpsareallclassifiedas1432．齿轮泵、螺杆泵和叶片泵都归类于容积式泵A.variablestrokepumpsB.multistagepumpsC.positivedisplacementpumps'D.triple-portedp

umps1429A1430B1431D1432C1433Whichofthefollowingarecomponentsofamechanicalseal?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.Noneoftheabo

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

entrifugalpumpsD.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.neitherAnorB

D.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.redu

cegasflowturbulenceB.prevente~stgascorrosionC.increasetherateofcombustionD.increasetherateofheattransfer143

8Theconcentrationoftotaldissolvedsolidsinthewaterofanauxiliaryboilercanincreaseasaresultof1438．辅助锅炉给水的总溶解固体含量会因海水污染而提高。A.s

eawatercontaminationB.frequentsurfaceblowsC.dissolvedoxygendeaerationD.frequentbottomblows1439Airchambersareusuallyfittedtorec

iprocatinginorderto____1439．往复泵中的空气室用来保持流量稳定。A.increasedischargepressureB.increasesuctionvacuumC.developpulsationflowD.keepasteadyrat

eofflow1440Thewaterinanauxiliaryboilershouldbe,testedforchloridecontenttodetermine____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.saltcontaminationC.waterhardnessD.chlorinecontamination1437D1438A1439D1400B1441Apositivedisplacementpumpisthatwherethev

olumeofthepumpchamberisalternately____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.decreased/increasedC.decreased/decreasedD.increased/increased1442Whichofthefollowingpumpsareself-priming,a

ndcandealwithliquidformalevelbelowthepump?①reciprocating;②rotary;③centrifugal.1442．往复泵和旋涡泵都具有干吸能力。A.①onlyB.①and②C.①②and③D.②and③1445Whichofth

efollowingpumpsareserf-priming,andcandealwithliquidfromalevelbelowthepump?,①reciprocating;②vane③gear.1443．往复泵、叶片泵和齿轮泵都

具有干吸能力。A.①onlyB.①and②C.①②and③D.②and③1444Apumpissaidtohave"negativesuctionhead"whenthepumpislocated____1444．当泵位于供液管之上时，泵具有“负压头”。A.betweenthesuct

ionanddischargeB.belowtheli~dsupplyC.abovetheliquidsupplyD.anyoftheabove1441A1442B1443C1444C1445Ifabilgepumpfailedtobuildupdischarge,pressur

e,youshouldcheckfor____.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.aclosedskinvalve1446Theadvan

tageofacentrifugalpumpascomparedwitha1447reciprocatingpumpisthat____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.di

schargeiscontinuousB.ithasnointernalvalvesC.uponaccidentalclosingofdischargevalve,excessivepressurewillnotbuildupD.alloftheaboveare

true1447Whichofthefollowingpumpsbelongstocentrifugalpump?1447．扩压泵属于离心式泵。A.Reciprocatingpump.B.Screwpump.C.Diffuserpump

.D.Water-ringpump.1448Whileflowingthroughthevoluteinacentrifugal,partofthe____energyoftheliquidisconvertedto____en

ergy.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.pressure/height1445B1446D1447C14

48A1449Whenthereisaflamefailureinanautomaticallyfiredauxiliaryboiler,the____自动锅炉因故障熄火，应切断燃油供应。A.airsupplyis

shutoffB.fuelsupplyisshutoffC.watersupplyisshutoffD.safetyvalvelifts1450Finsareinstalledonthegeneratingtubesurfacesinwastehea

tboilersto____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.increasethe

velocityofexhaustgasflowD.increasetherateofheattransfer1451Excessivevibrationofanautomaticallyfiredauxiliaryboilercanbecausedby____1451．自动锅炉的燃烧脉冲

会引起锅炉振动过大。A.airorwaterinthefurnaceB.combustionpulsesC.fueloilpumpfailureD.flamefailure1449B1450D1451B1452Ifthefeedpumpforanauxiliaryboilerfailsto

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

allyhighboilerwatertemperatureD.steamdemandexceedingfeedpumpcapacity1453Blacksmokecomingfromaboilercanbecausedby____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/fuelratio1454Propercombustioninaboilerw

ouldbeindicatedby____1454．锅炉正常燃烧火焰应该是金黄色。A.yellowishflameB.goldenyellowflameC.whiteflameD.brilliantwhiteflame1455Thefeedwatertotheboil

erwillcomprise1455锅炉的给水包括凝水和少量的补偿水A.condensateB.asmallamountofmake-upfeedC.AandBD.Noneoftheabove.1452B1453D1454B1455C1456Thef

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

waterB.purgedC.clearedofairD.noneoftheabove1457Toomuchairinthefurnaceofanoil-firedboilerwouldbeindicatedby1457．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.onetosup

plysteamtothemainpropulsionturbineB.anauxiliaryboilerC.AandBD.neitherAnorB1459Afeedpumpforanauxiliaryboilermightlosesuctionifthe____1459．

辅助锅炉给水温度过高，给水泵会失去吸人压头A.boilerwaterlevelislowB.feedwateristoohotC.boilersteamdemandislowD.feedwateristoocold1456B1457D1458B1459B1460Thewaterlev

elinasteamingboilerwillalways____辅助锅炉的水位将随蒸汽需求量的变化而变化。A.varyasthesteamdemandchangesB.remainconstantaslong

asthefeedpumpoperatesC.fallwhenthesteampressureisdecreasedD.risewhenthesteampressureisincreased1461Whic

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

ctionheadpressureB.DecreasedfeedwatertemperatureC.PumprecirculatinglinebeingopentoomuchD.Excessivefeedwatertempera

ture1462Ifatanormalsteamingconditionandwatergoesoutofsightingaugeglassestheactionyoushouldtakeis:①secureoi

ltofires;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.neither①nor②1460A1461D1462A1463Foaminginthest

eamdrummaybecausedby____inaboiler.蒸汽需求量过大会引起蒸汽筒产生汽泡。A.oxygeninthewaterB.poorboilerdesignC.densitytoohighD.excessivesteamdemand146

4Thewaterinanauxiliaryboilershouldbetesteddailyfor____对辅助锅炉的给水，应每天化验氯含量。A.dissolvedoxygenB.chloridesC.sludgeD.dissolvednitrogen1465Ina____boilert

hehotgasesfromthefurnacepassthroughthetubeswhilethewaterisontheoutside.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.Noneoftheabove.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.TheboileroiltankB.ThesteampipeC.ThefiresideD.Thesafetyvalves1463D1464B1465B1466D1467Inreadyinganauxiliarywater-tubeboilerforar

outinehydrostatictest,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.Theboilerven

tvalvesshouldbeopened.C.Allhand-hole/manholecoversshouldbetightenedupasmuchaspossibletoprecludeanyleaks.D.Alloftheabove.1468Adazzlingwhiteburnerf

lameintheboilerfurnaceindicates____1468．对于烧油锅炉，空气过多，火焰呈亮白色A.propercombustionB.waterinthefuelC.excessairD.coldfueloil1467B1468C1469Th

efuelsupplysystemtoanautomaticauxiliaryboiler,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.salinityisabnormallyhighB.steamdemandistoohighC.waterlevelisabnormallylowD.feedwaterflowislow1470Thecor

rectpHvalueofboilerwaterisachievedbycontinuousadditionofasuitable____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.Noneoftheabov

e1471Blacksmokecomingfromaboilercanbecausedby____1471．汕温低会引起锅炉冒黑烟。A.lowwaterlevelB.highwaterlevelC.excessivelyhighfuelpres

sureD.lowoiltemperature1472____willbeusedtoblowawaysootandthecombustionproductsfromthetubesurface.1472．吹灰器用来吹除管子表面的燃烧

产物。A.TheblowdownvalveB.ThescumvalveC.TheairreleasecockD.Soot-blower1469C1470B1471D1472D1473Afteranormal,orsafetyshutdown,au

tomaticcombustioncontrolsystemsforanauxiliaryboileraredesignedtopreventtheimmediatere-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.drumleveltosta

bilize1474Impropermaintenanceofanautomaticauxiliaryboileroilburnercouldresultin____1474．自动锅炉的燃烧器保养不善，会引起锅炉效率下降。A.fuelpumpfailureB.fanmo

torfailureC.increasedfeed-waterconsumptionD.decreasedboilerefficiency1475Ifthefiregoesoutinanautomatical

lyfiredauxiliaryboilerandtheburnercontinuestosupplyfuel,thereisapotentialdangerof____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.overpressurea

nddryfiringB.aseverefurnaceexplosionC.spallingdamagetothebrickworkD.heatdamagetotheatomize1473A1474D1475

B1476Priortolightingoffacoldautomaticallyfiredauxiliaryboiler,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.checkandregula

tethewaterlevelB.closetheaircockoncefiresarelitC.blowdownthegageglassD.crackthesteamstoptoassureprotectivesteamf

low1477Whichofthefollowingitemsisnecessaryforallwasteheatboilerinstallations,regardlessofdesignormanufacturer?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.1478Forproperoperati

on,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.Lo

wpH.C.Properalkalinity.D.Alloftheabove.1476A1477A1478C1479Whenawasteheatboilerisinstalledintheexhaustofamainpropulsiondieselengine,theexhaustgasbypas

swouldbeused____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.atlowloadstopreventcorrosionintheboilerC.duringperiod

sofhighsteamdemandD.whentheturbochargerisinoperation1480Whenahydraulicvanepumpisworking,whichofthefollowingisincontactwiththe

vanes?①therotor;②theinternalsurfaceofthehousing;③theexternalsurfaceofthehousing.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.①②and③1481Ther

mostaticexpansionvalveare____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.thro

ttleddependingonloadD.controlledbysuctionpressure1482Whichofthefollowingmaycausethatexcessivelywarmwaterleavesthecondenserinarefrigerationpla

nt?1483①toolittlecoolingwater;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.anyof①,②and③C

.either①or③D.either①or②1479B1480C1481C1482C1483Ifarefrigerationcompressorisrunningcontinuouslywithoutloweringtemperatureasnormalinth

erefrigerator,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.excessivecondensercoolingwaterB.warmfoodintherefrigeratorC.asho

rtageofrefrigerantD.ashortageofcompressoroil1484Thecoloroftheflameonahalidetorchwithoutanyrefrigerantpresentis____1484．对于卤素

灯，无制冷剂时火焰呈蓝色。A.blueB.greenC.orangeD.purple1485Thecompressorsuctionlineconveystherefrigerantvaporfrom____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.Noneoftheabove.1486Ifananchorwindlasshasbeenidleforsom

etime,youshould____1486．如果锚机有一段时间不用了，使用前应润滑A.repackallvalvestemsB.lubricateitpriortouseC.replacethefoundationboltsD.b

alancethewarpingheads1483C1484A1485B1486B1487Waterallowedtoaccumulateinthehydraulicsystemoilwillcauseanox

idationprocessproducingby-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.removedby

cellulosetypefiltersC.neutralizedbyoiladditivesD.notremovedbyabsorbentfilters1488Itispossibletomountadoublesuctioncentrifugalpumpimpellerwit

hthevanesfacinginthewrongdirection.Thiswouldcausethepump____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.ef

ficiencytodecreaseD.slippagetodecrease1489Athermostaticexpansionvalveisproperlycontrollingevaporatorsuperheat.Adjustingthisvalvetolowerthesupe

rheatwillresultina/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.evaporatorcoilover-feedC.evaporatorcapaci

tyincreaseD.expansionvalvediaphragmrupture1487A1488C1489B1490Aircompressorreceiversshouldbe"blowndown"atleast____空气瓶每天应放残。A.yearlyB.qua

rterlyC.monthlyD.daily1491Hydraulicmachineryfailuresarecommonlycausedbymisalignmentofthesystemcomponentsandby____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.excessivefluidfrictionC.turbulentfluidflowD.fluidpressuresurges1492Adoublesuctioncentrifugalpumpi

mpellerhasbeeninstalledinthereversedirection,andwill____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.haveagreaterheadcapacity

B.operatewithincreasedimpellerefficiencyC.dischargethroughthesuctionsideofthepumpcasingD.requiremorep

owertoturntheshaft1493Ifacentrifugalpumpwerecontinuallyoperatedwiththedischargevalveclosed,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.mo

torcontrolleroverloadwouldopenB.pumpwouldeventuallyoverheatC.reliefvalvewouldcontinuouslycycleopenD.motorwou

ldoverheat1490D1491A1492D1493B1494Whenyouadjustathermostaticexpansionvalve,____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.refri

gerantmustbebledoffthesensinglinebeforeadjustmentsaremadeB.allrefrigerantmustbepumpedintothereceiverbeforeadjustme

ntsaremadeC.timemustbeallowedforconditionstostabilizeintheevaporatorbeforefurtheradjustmentsaremadeD.allrefrigerantmustbemutedthroughthedehydra

torwhilechangingthesuperheatsetting1495Hydraulicmachineryfailuresarecommonlycausedbycontaminationofthehydraulicfluidand____1495．液

压机械的故障通常有系统部件失中和润滑油污染。A.fluidfrictionB.fluidturbulenceC.componentmisalignmentD.pressuresurges1496Therefri

gerationsystemlowpressurecutoutswitchisactuatedby____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.asensingb

ulbatthetailcoiloftheevaporatorC.pressurechangesinthesuctionlineD.failureofthekingsolenoidvalve1494C1495C149

6C1497Aknockingsoundemittedfromanunloadedaircompressorisprobablycausedby____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.excessivelytightmountingboltsC.insufficientcylinderlubricationD.aloosepiston1498Whichofth

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

ve.B.Increasingtheabsolutepressureoftheshellwillincreasethedistiller'scapacity.C.Meshseparatorsareusedinevaporatorstofilterthedistillate.

D.Reducingthebrinedensitywillreducetheheatlostoverboard.1499Thesensinglineforthelowpressurecutoutswitchtoarefr

igerationsystemislocated____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.onthesuction

sideofthecompressorD.onthedischargesideofthecompressor1497D1498A1499C1500Intheproductionoffreshwaterfromseawat

erthroughaprocessofheatingandcooling,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.distil

lationC.dehydrationD.condensation1501Theprocessofboilingseawaterinordertoseparateitintofreshwatervapo

randbrineisusuallydefinedas____1501．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.diss

olution1502Thepurposeofthelowpressurecut-outswitchisto____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.maintainliquidrefrigeran

tatthesuctionofthecompressorB.maintainapresetsuctionpressuretothecompressorC.startandstopthecompress

oratpresetoperatingpressuresD.operateatminimumefficiency1503Overheatingofahydraulicsystemmaybearesultof____1503．液压油粘度不宜会引

起液压系统过热。A.changingpumpdischargepressureinresponsetonormalloadvariationsB.ahighoillevelC.incorrectfluidviscosit

yD.continuedslowre-circulationoftheoil1500D1501C1502C1503C1504Condensatemustbedrainedperiodicallyfromtheair

compressorreceiverstoprevent____空气瓶应定期放残，以防气动阀件误动作。A.secondstagecylinderlockupB.oilsumpcontaminationC.faultyoperationofpneumati

cvalvesD.corrosionofairreceiverbaffles1505Whenaflash-typeevaporatoristobesecuredforanextendedperiodoftime,theentireu

nitshouldbedrained,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.completelyfilledwithsaltwaterB.filledwithde-scalingcompoundC.tightlyclosedtoexc

ludeairD.ventedtotheatmosphere1506Shortcyclingofarefrigerationcompressorrefersto____1506．制冷压缩机“短循环”，指的是压缩机启、停频繁。A.frequentlygroundingoutB.fre

quentlystartingandstoppingC.runningtoofastD.runningtooslow1504C1505D1506B1507Theemergencybilgesuctionvalveistypicallyused____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.toinjectcleaningadditiveswhenthebilgesareextremelydirtyB.whenthemaincondenserbecomesfouled,inordertoprovideadditionalcooli

ngwatercirculationC.toconnecttheroseboxtotheindependentbilgesuctionD.ifthebilgesbecomefloodedandtheycannotbeemptiedbya

nyother1508Onallvesselsequippedwithrefrigerationunitsofover20cubicfootcapacity,____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.agasm

asksuitableforprotectionagainsteachrefrigerantused,oraselfcontainedbreathingapparatusmustbeprovidedB.itisthesoleresponsibi

lityofthechiefengineertoascertainthatallmembersoftheengineeringdepartmentarefamiliarwiththeuseofgasmasksorbreathingapparatusC.sparechargessh

allbecarriedforatleast50%ofeachsizeandvarietyofgasmasksand/orselfcontainedbreathingapparatusD.alloftheabove1509Whichofthelistedtypessteam

trapsoperatesontheprinciplethathotwaterflashestosteamwhenitsvaporpressureisrapidlyreduced?1509．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.Impulse1507D1508A1509D1510Theheatgainedperpoundofrefrigerantintheevaporat

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

ation1511Theprocessofremovingmoisturefromairisknownas____1511．从空气中去除水蒸汽的过程称为“除湿”。A.humidificationB.dehumidificationC.vapori

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

.duetotheinabilityofthistypeofpumptoliftwatertocoverthesuction(eye)oftheimpellerC.toinitiallyunloadthepumpbyhavingitsheadpre

ssureequaltodischargepressureD.inordertoovercomethepotentialenergyofwaterinthedischargeline1510C1510C1511B1512B1513Whichofthelistedcon

ditionscanleadtocavitationina1514centrifugalpump?离心泵吸入口有气泡，会引起泵产生“气蚀”现象。A.VaporpocketsformedinthesuctionflowstreamB.Roughcasingvolutesurfac

esC.WornwearingringsD.Heavyfluidintheflowstream1514Whichofthefollowingdescriptionsbestidentifiestheoperatingprincipalofaflash-typeevaporato

r71514．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.Seawaterispassedoverheatedplatesinathinfilm.C.Hea

tedseawaterisinjectedintoavacuumchamber.D.Seawaterisforcedthroughaheatedeductor.1515Ifairat95°Cdrybulbtemperatureand50%relativehumidityisconditi

onedto75°Cdrybulbtemperatureand50%relativehumidity,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.coolinganddehumidifyingD.adiabaticcooling1513A1514C1515C1516Whatisafunctionof

thewearingringsusedinmostcentrifugalpumps?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.Sealpu

mpshaftagainstentryofair.C.Isolatethedischargesidefromthesuctionside.D.Dampentheturbulentdischargeflow.1517Whenliquidreachesthecompr

essorofarefrigerationsystemthroughthesuctionline,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.overf

lowingD.recycling1518Theterm"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.throughastandardorificeataspecifiedtemperatureD.atarateof60ccpersecond1519Areciproc

atingaircompressorisnmningroughlyandvibratingexcessively,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.compressorisoverl

oadedB.motorisoverloadedC.foundationboltsarelooseD.beltsaretootight1516C1517A1518B1519C1520Increasingthemoisturecontentofconditionedairisk

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

ndcontroloffluidflowareaccomplishedbymovingthe____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.cylinderbody1522Tom

aintaindesigndischargepressurefromacentrifugalpump,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.lanternringandimpeller1523Ifaradialpistonhydraulicpumpfailstodel

iverratedfluidvolume,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.contaminatedfluidB.pittedthrustringsC.wornpintlebearingsD

.obstructedsuctionspassage1524Withrespecttocentrifugalpumpimpellers,whichofthefollowingdescriptionsrepresentsthecorrectcentrifugal

pumpclassification?1524．按照离心泵叶轮数量来分类，可分为单级和多级A.Singlestageormultistage.B.Highpressureorlowpressure.C.Openorclosecoupled.D.Horizontal

orvertical.1520D1521C1522C1523D1524A1525Thesumofthesensibleheatandthelatentheatofanysubstanceisknownas____任何物质的显热和潜热之和，称为“总热量”。A.tota

lheatB.residualheatC.specificheatD.superheat1526Thestaticsuctionliftofapumpisthedifferenceinelevationbetweenthe____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.centerlineofthepumpandtheleveloftheliquidinthesuctionwellwhenthesourceofliquidisbelowthepumpB.ce

nterlineofthepumpandthesuctionliquidlevelwhenthesourceofliquidisabovethepumpC.centerlineofthepumpandthelevelofthedischargeliquidD.liquidlevelsoft

hesuctionanddischarge1527Theheatidentifiedbyonlyachangeintemperatureisknownas____1527．仅以温度改变表现出来的热量，称为“显热”。A.sensibleheatB.latentheat

C.totalheatD.residualheat1528Theusualnumberofsingle-actingpistonsusedinavariablestrokeaxial-pistonpu

mpis____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.9or111525A1526A1527A1528C1529Anaxialpistonpumpdiffersfro

maradialpistonpumpasthepistonsofanaxialpistonpumparepositioned____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.radi

allyfromtheshaftB.paralleltoeachotherandtotheshaf1532C.paralleltoeachotherbutatarightangletotheshaf1533D.atanangletoeachotherandtotheshaft15

341530Inreferencetoairconditioning,whenairattainsthemaximummountofmoistureitcanholdataspecifictemperature,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.convected153

1Whyareremovablesleevesinstalledoncentrifugalpmnpshafts1531．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.Theymakeiteasiertoreplacethepump

shaftpacking.B.Theycanbeeconomicallyreplacedastheywearout.C.TheycanberemovedwhenitisnecessarytolightentheweightofthepumpD.Theyincreasethestrengtho

ftheshaft.1529B1530B1531B1532IfareciprocatingaircompressorhasaknockoccurringinfrequencywithitsoperatingRPM,thecaus

eisprobably____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.defe

ctiveorpoorlyfittedvalvesD.Alloftheabove1533Whichofthefollowingstatementsrepresentstheadvantageofrotarypump

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

dperunittimethanthereciprocatingpump.B.Rotarypumpsarecapableofpumpingmorefluidthanreciprocatingpumpsofthesameweight.C.Rotarypu

mpsoccupyonlyone-halfthespaceofreciprocatingpumps.D.Rotarypumpseliminatedischargeslippageofthepumpedliquid,whilethis

doesnotholdtreeforareciprocatingpump.1534Whichofthefollowingfactorswillhavethegreatesteffectontheheatingloadwithinaconditionedspace?渗热和

通风对空调处所的热负荷影响最大。A.Solargain.B.Infiltrationandventilationair.C.Occupantsinsidethespace.D.Entertainmentequipmentwithinthespace.1532A1533B1534B15

35Whichofthefollowingtermsrepresentstheformofheatremovedfromtherefrigerantinthecondenserofarefrigerationsystem?

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.Allofthe

above.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.

Productionofhighsalinitydistillate.B.Seawaterfeedtemperaturebelow165~C.C.Aleakinthefirststagedemister.D.Acrackeddistillate

pumpventline.1537Thedewpointofairisreachedwhenthewetbulbtemperatureis____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.twicethedrybulbtemperatureB.10

~2abovethedrybulbtemperatureC.5~CabovethedrybulbtemperatureD.equaltothedrybulbtemperature1535D1536D1537D1538Increasingthes

peedofarotarypumpaboveitsratedspeedwillresultinwhichofthefollowingconditionstooccur?旋涡式泵超速运转，将使间隙增大。A.Loss

ofsuctionB.IncreasedclearancesC.DecreasedclearancesD.Decreasedslippage1539Thetendencyforlubricatingoiltothinoutathightempe

raturesandthickenatlowtemperatureswillbecharacterizedbya____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.h

ighviscosityindexC.highneutralizationnumberD.lowdemulsibilityquality1540Thetemperatureatwhichwatervaporintheatmosphereb

eginstocondenseiscalledthe____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.psychome

trictemperatureD.absolutehumiditytemperature1538B1539A1540A1541Oneofthemaindifferencesbetweenthevarioustypesofscrewpum

psisinthe____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.typeofdrivinggears154

2TheFIRSTthingtodotoensurethatarefrigerationunitwillnotstartwhileundergoingrepairs,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.secureandtagtheelec

tricalcircuitB.placeacrowbarintheflywheeloftheunitC.informallpersonsintheareanottostarttheunitD.makealogboo

kentry1543Inarefrigerationsystem,therefrigerant~rbsthelatentheatofvaporizationinthe____在制冷系统中，制冷剂在蒸发器中吸收蒸发潜热。A.compr

essorB.condenserC.receiverD.evaporator1541C1542A1543D1544Theonlymeansofremovingthelatentheatofcondensationfroma]1545refri

gerantinthenormalrefrigerationcycleisby____在制冷系统中，去除制冷剂冷凝潜热的设备是冷凝器。A.passingitthroughtheexpansionvalv

eB.condensingrefrigerantinthesystemcondenserC.passingthegaseousrefrigerantthroughtheheatinterchangeronthesu

ctionsideofthecompressorD.maintainingahighpressureonthesystem'sreceiver1545Withreferencetoavessel'sstruct

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

lityofcausingbrittlefracturesB.highlycorrosiveactiononmildsteelC.vaporcloudwhichreactsviolentlywithsaltwaterD.toxicityatatm

osphericpressure1546Theheatrequiredtochangeasubstancefromasolidtoaliquidwhileatitsfreezingtemperature,isknownasthelatentheatof____1547154

6．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.sublimation1544B1545A1546A1547Thedegreetowhichtheviscosityo

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

C.pourpointD.thermalchangevalue1548Whichoftheprocesseslistedconsumesthegreatestamountofpowerwhileproducingthegreatestamountofhea

t?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.Overcomingrollingfriction.C.Overcomingfluidfriction.

D.Overcomingoilwedgefriction.1549Theheatrequiredtochangeasubstancefromaliquidtoagaswithoutexperienci

ngatemperaturechange,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.condensat

ion1550Adistinguishingfeatureofaneductor,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.

dischargeendbeingsmallerthanthesuctionendB.smallsizeofimpellerC.lackofmovingpartsD.easeatwhichthewearingrin

gsmaybechanged1547B1548A1549B1550C1551Whensecuringaflash-typeevaporatorforanextendedperiodoftime,yousho

uld____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-scalingcompoundC.completelydraintheunitD.tightlysealtheunit

toexcludeair1552Whichfeaturesofacentrifugalpumpreducetheneedforrenewingwornimpellersandpumpcasings?1

552．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.Lowrotationalspe

edofimpeller.C.Removableendplate.D.Replaceableimpellerandcasingwearingrings.1553Acentrifugalpumpmayfailtodeliverwaterwhenfir

ststartedifthe____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.impellerisfloo

ded1551C1552D1553B1554Whichofthedeviceslistediscommontoalltypesofpumps?所有形式的泵，都具有功率端和流体端。A.Apowerendandflu

idend.B.Apropellerandeducator.C.Avoluteandimpeller.D.Aturbineandpiston.1555Ifacentrifugalpumpvibratesandisnoisywhenoperating,the

causecouldbe____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.reversedpumpcoupling1556Distilledwaterfromaneva

poratormaybedischargedintoapotablewatertank____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.throughadetachablehoseconnectionB.afterpassingthroughanactivatedc

harcoalfilterC.afterchemicalanalysisshowsitisfitforconsumptionD.throughasolenoidoperatedthree-wayvalve1557Ifthecapacityofacentrifugalpumpde

creasesgraduallyoveralongperiodoftime,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.packinggla

ndB.mechanicalsealsC.lanternringsD.wearingrings1554A1555C1556D1557D1558Toabsorbthewearresultingfromimpellerrotationandabrasi

vesintheliquid,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.casingvolutesD.wearingrings155

9Personnelworkingwithrefrigerationsystems,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.arespirat

orC.rubberglovesD.anallpurposegasmask1560Thepurposeofanaircompressorunloadingdeviceisto____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.delaythecompressionprocessuntilthemotorisuptospeedD.checkpumpalignment15

61Theamountofmoistureinagivensampleofair,whencomparedwiththeamountofmoisturetheaircouldholdiftotallysaturatedattheexi

stingtemperatureofthesample,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.relativehumidity1558D1559A1560C1561D1562Whichofthefollowingstatementsiscorrectrelativetodistillation1563plantope

ration.?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.Distillationistheprocessofboilingseawatertoproducevaporwhichiscon

densedintofreshwater.B.Evaporationisthesecondpartofthedistillationprocesswherebrineisremoved.C.Brineistheresultofcondensedseawaterva

por.D.Distillateistheproductresultingfromtheevaporationoffreshwatervapor.1563Ifacentrifugalpumpisdrivenbyaconstantspeedelectricmotorandproducesadisch

argepressurelessthandesigned,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.excessivepumpspeed

B.excessivesuctionheadC.wornwearingringsD.grosspumpmisalignment1564Theratiooftheweightofmoisturecontainedinagivenvolumeofair,totheweightof

moisturethatthesamesamplewouldholdifsaturated,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.absolutehu

midityB.relativehumidityC.specifichumidityD.totalhumidity1562A1563C1564B1565Whichofthelistedchemicalscanber

outinelyusedtomaintaintilehygienicqualityofpotablewater?化学剂氯可用来保持饮用水的卫生质量。A.HydrochloricacidB.ChlorineC.SulfuricacidD.Zincchromate1566Thes

teamcoilsinahighpressureevaporatorusedforsaltwaterserviceshouldbede-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.achippinghammer1567Thepackinginstalledinthepumpstutfingboxislubricatedby____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.greasecupsC.handduringinstallationD.leakagethroughthestuffingbox1568Ifyouwereoperatingacentri

fugalwaterservicepumpwithwornwearingrings,the____如果离心泵的承磨环磨损，排量将小于设计值。A.pumpwouldbeverynoisyB.pumpwouldvi

brateexcessivelyC.pumpwoulddevelopinsufficientflowD.stuffingboxwouldleakexcessively1565B1566C1567D1568C1569Whichofthef

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

temperature.B.Nochangeinviscosityoccurswithanychangeintemperature.C.Verylittlechangeinviscosityoccurswithasignific

antchangeintemperature.D.Theviscosityoftheoilincreaseswithanincreaseintemperature.1570Brinedensityinadistillin

gplantismeasuredwitha/an____蒸馏装置中盐度是由盐度计来测量的。A.psychrometerB.salinometerC.anemometerD.sphygmomanometer1571Oneofthemainfuncti

onsofwearingrings,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.maintainradialalignment

betweenthepumpimpellerandcasingB.absorballimpellershaftendthrustC.preventwaterleakagetotheatmosphereD.preventwearofthepumpcasingand/orimpeller

1569C1570B1571D1572Forsafestorage,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,whatspecialattentionshouldbegiventothehydraulic

system?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.Thefiltersandstrainersshouldbeche

ckedfrequently.C.Allsystempressureshouldbereadjusted.D.Thesystemshouldbedrainedandrenewedwithafluidofdifferentoperatingcharacteri

stics.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.bypassthehighpre

ssurestagetothelowpressurestageon100%oftheaircompressorsinserviceB.preventexcessiveinter-stagepressurebuildupC.controlc

ompressordischargepressureD.removeallbutthefrictionalloadduringstarting1572B1573B1574D1575Whichofthefollowingisop

eratedfromthemainengineroomconsoleonanautomatedvessel?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.LubeoilpumpanddistillingplantC.Distilling

plantandshaftalleydoorD.ShaftalleydoorandfixedC02release1576Ammoniawhenusedasarefrigerantisvaluablebecauseofitshigheffi

ciency,itishowever____氨用作制冷剂，效率高，但是它有毒、易燃、易爆。A.toxicB.flammableC.explosiveD.alloftheabove1577Whichofthefollowingtermsisusedtoidentifythepressureofth

eliquidenteringapump?通常用“吸人压头”来表示进入泵流体的压力。A.SuctionheadB.PumpheadC.DischargeheadD.Totalhead1578Whensubjectedtohighheatf

romaopenflame,oranelectricheatingelement,whichofthelistedrefrigerantswillbreakdownandproducephosgenegas?Ｒ２２制冷剂与高温接触后，会分裂并产生光气。A.C

O2B.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.theabili~ofoiltoseparatefromwaterB.thetemperatureatwhichoilflowsrapidlyC.ameasureofthewaterinalubeoilsystemD.anemulsionofdif

ferentgradesofoil1580Theclearancevolumeforasinglestagecompressorisdefinedasthespacecreatedbetweenthe____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,includingthe

spacearoundthepistontothetopoftheupperringandunderthevalves,withthepistonatTDCC.bottomofthepistonandbottomsideof

theheadatTDC,regardlessofupperringlocationandvalveplacementD.topofthepistonandbottomsideoftheheadatTDCascomparedtothatwhichexist

sbetweenthetopofthepistonandbottomsideofheadatBDC1579A1580B1581Ifthedischargevalveisclosedbeforethedrivem

otorisstopped,whichofthefollowingtypesofpumpswillmostlikelybedamaged?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.Turbine1582Whenthereli

efvalveopensitdischargeshighpressurerefrigerantvaportothe____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.liquidstrain

erB.refrigerantinletofthecondenserC.inletsideoftheevaporatorD.suctionsideofthecompressor1583Theabilityof

anoiltoseparatecleanlyfromanoilandwatermixtureisreferredtoasits____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.demulsibility1581B1582D1583D1584Whichofthefollowingstatementsistrueconcerningtheoveralleffi

ciencyofaircompressors?从效率角度看，双级空气压缩机的效率高于单级压缩机。A.Highpressurecompressorsaremoreefficientthanlowpressurecompressors.B.Mechanicalefficiencyd

ividedbycompressorefficiencywillequaltheoverallefficiencyofthecompressorunit.C.Twostagecompressorsaregenerallymoreefficientthansinglestagecompres

sors.D.Thevolumetricefficiencyisdecreasedinmultistagecompressors.1585Toobtainmaximumefficiency,twostageaircompressorsareusually____1586为了

提高效率，双级空气压缩机装有中冷器。A.horizontallymountedB.neverfittedwithintakefiltersC.fittedwithintercoolersD.operatedinan

unloadedconditionatalltimes1584C1585C1586Thefunctionofthehydraulictelemotortransmitterusedinanelectro-hydrau

lic1587steeringgearsystemisto____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.transmittherudderangletothebridgeindicatorB.preventthecontrollin

kagefromstrikingthestopswhenhardoverC.automaticallypurgeallentrainedairfromthesystemD.sendhydraulics

ignalstothereceivingunit1587Whichofthefollowingstatementsis/aretrueregardinghydraulicpumpsingeneral?对于齿轮泵，排量的改变只能通过改变泵的转速来实现。A.Variablevo

lumescanbeobtainedwithgearpumpsonlybyvariationofthepumpdrivespeed.B.Aradialpistonpumphousesslidingpistonsinastationarycylinderblockthr

oughwhichpassesarotatingpintleorportedshaft.C.Theamountoffluiddisplacedperrevolutionofanaxialpistonrotarypumpisdependentontheanglefor

medbetweenthecylinderblockandvalveplate.D.Alloftheabove.1588R-12isgenerallyconsideredtobeasafe,nontoxic,nonflammable,andnon-explosiverefrigeran

t.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.incon

tactwithanopenflameC.heatedtotheboilingpointD.Alloftheabove.1586D1587A1588Belectn)1589Arefrigerationsystemcontaminatedwithmoisturecan

beaffectedby____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.Alloftheabo

ve1590Somechloronatedflourocarbonrefrigerantsmaydecomposeintoatoxicirritatinggasifitis____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.storedattemperaturesbelow60degreesFahrenheitB.chargedintoasystemhavingcopperfittingC.allowedtomixw

ithcompressoroilD.exposedtoanopenflameorhotsurface1591Whichofthefollowingstatementsdescribestherelationshipbetweenviscosityand

specificgravity?如果不明确或限制其他条件，粘度与密度没有直接关系。A.Liquidswithdifferentviscositieswillalwayshavethesamespecificgrav

ity.B.Liquidswithdifferentviscositieswillneverhavethesamespecificgravity.C.Viscosityandspecificgravityare

directlyproportional.D.Viscosityandspecificgravityarenotrelatedinthatonedoesnotdefineorlimittheother.1589D1590D1591D1592The

deliveryrateofavariablestrokeaxialpistonhydraulicpumpiscontrolledbyvaryingthepositionofthe____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.reactionring1593Thepressureofaliquidleavingthepu

mpcanbereferredtoasthe____液体离开泵时的压力，称为排出压力。A.totalheadB.dischargeheadC.netpositivesuctionheadD.suctionhead1594Tubeleaksinthedistillatec

oolerofatwostageflashevaporatorwillresultin____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.lossofsecondstagevacuu

mB.contaminationofthedistillateC.lowerfeedinlettemperatureD.contaminationofthesecondstagecondenser1595Airleakagebetweent

heshaftandstuffingboxpackinginacentrifugalpumpis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.aliquids

ealD.thestuffingboxgland1596Thesuction-forceprincipleofoperationisatypicalcharacteristicof____往复泵是基于“吸力”原理来工作的。，A.centrifugalpumpsB.jetpu

mpsC.propellerpumpsD.reciprocatingpumps1597Hydraulicpumpsmostcommonlyusedinsteeringsystemsareofthe____舵机

系统中使用的液压泵通常是轴向柱塞泵。preventedby____A.lobetypeB.screwtypeC.axialpistontypeD.volutetype1592B1593B1594B1595C1596D1597C1598Anadditiveusedtoimprovetheabi

lityofalubeoiltoreducefrictionisknownasa/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.extr

emepressureadditiveD.viscosityimproveradditive1599Inanelectro-hydraulicsteeringgearsystem,whenwillthevariabledisplacementpumpbeplaced

onstroke?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-wayvalveisopene

d.C.Whentheramreliefvalveshft.D.Whentherudderangleisdifferentfromthepositionofthehelm.1600Whichofthelistedoperationswillcauseanautomatica

llycontrolledrefrigerationcompressortorestart?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.Closingoftheexpansionva

lveC.AnincreaseinthesuctionpressureD.Decreasingthesuctionpressure1598C1599D1600C1601Saltwateristypicallyprovidedtoarefr

igerationsystemto____向制冷系统提供海水，是用来冷却制冷剂气体。A.cooltheexpansionvalveB.preventrefrigerantsuperheatingC.condensetherefri

gerantgasD.preventmotoroverheating1602Undernormaloperatingconditions,therudderishydraulicallylockedunless____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.aredderorderisgivenbythecontrolsystemD.anelec

tricpowersystemfailureoccursatthesteeringgear1603Whichofthefollowingstatementsiscorrectconcerningtheviscosityoflubricatingoil?滑油的粘度是表示滑油流动时

的内阻力。A.Viscositywillincreaseastemperatureincreases.B.Viscosityisameasureof'afluid'sinternalresistancetoflow.

C.Viscositywilldecreaseastemperaturedecreases.D.Viscosityisnotdependentontemperature.1601C1602C1603B1

604Thepourpointoflubricatingoilsisaffectedthemostbywhichofthefollowing?滑油的倾点受石蜡含量的影响最大A.Extensivecentrifuging.B.Waxcontent.C.Watercontent.D.Acidc

ontent.1605Theviscosityofanoilisameasureofits____油的粘度是表示油流动时的内阻力。A.weightB.internalfrictionC.demulsibilityD.S.A.

E.number1606Althoughlubeoilsusedinthemainlubricatingservicesystemsshouldhavearelativelyhighflashpointtoavoidigniti

on,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.comeincontactwithex

tremelyhotsurfacesC.arereducedintemperaturetojustabovethepourpointD.becomeextremelyagitatedoraerated1607Hydrau

liccranesmustbeproperlywarmned-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-upallowsthehydrauli

csystemtobecomechargedwithoilB.warm-upallowsthereliefvalvestobeproperlytestedC.hydraulicstrainersoperateonlyduringthewarm-

upperiodD.hydraulicfluidmustbeattheproperviscosity1604B1605B1606B1607D1608Whichofthefollowingstatementsdescribesthefunctionofanaircompressorintakefi

lter?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.Protectsagainstsuctionvalvefloat.B.Providesapositivepressure

ontheairinletvalves.C.Preventslubricatingoilcontaminationofthecompressedairsupply.D.Protectsagainstthedamagingeffects

ofairbornesolidparticles.1609Whichofthelistedcharacteristicsoflubeoilarethemostimportanttotheengineerfromanoperationalstandpoint?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.Pourpoi

nt,flashpoint,andprecipitationnumberD.Auto-ignitionpoint,viscosityindex,andfilmstrength1610Asalinityindicatingsystemfunc

tionsonthebasicprincipleofmeasuringthe____1610．盐度指示仪是通过测量水的导电性来测量盐度。A.electricalinductanceofwaterB.ele

ctricalconductivityofwaterC.specificgravityofwaterD.hydrogenionconcentrationofwater1608D1609B1610B1611Inaflashtypeevaporator,allsaltwaterheadersar

eventedthroughindividualventcockstothe____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.saltwaterheatershellB.second-stagecondenserC.atmosphereD.seco

nd-stageflashchamber1612Anaxialpiston,variablestrokepumpisusedinavessel'shydraulicsteeringgear.Underpressure,oilcontinuallyleaksoutfrombetweenthevalv

eplate/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.causedamagetothepumpifnotcontinuallydrainedf

romthepumpcasingD.resultinthesystemhighsidepressuretosubstantiallydropoff1611C1612C1613Acentrifugalpumpvibratesexcessivelyduringoperation

.Upondisassemblingthepumpitisfoundthattheimpellerisoutofbalance.Withoutanavailablespare,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.drillholesthroughtheheavysideoftheimpelleruntilitbalancesB.weldcounterweightstotheli

ghtsideoftheimpellerC.removemetalfromtheheavysidebymachininginalatheD.acidwashandscrapetheheavysideuntilitbalanc

es1614Moistureisremovedfromarefrigerationsystemby____1614。制冷系统中的水分通过除湿器来去除。A.bleedingrefrigerantfromthecond

enserB.openingadrainpetcockontheoilseparatorC.condensingthewaterintheheatexchangerD.usingadehydratorcartridge1613C1614D1615Whywillatwostageflashtyp

edistillingplanttendtooperatemoreefficientlywhenoperatingincoldseawater?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.Thecolderseawaterpassi

ngthroughthecondnsertubebundlesofthevariousstagesincreasesevaporatorvacuum.B.Theamountofheatedfeedwaterdischargedfromthefeedwaterheateraftercondenser

isincreased.C.Fewernon-condensablegasesarecreatedbytheflowofcolderseawater.D.Moreseawaterisallowedtopassthroughthefirststag

eoverflowweir.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.freezeontheexpansionvalves

eatandreducetheflowofliquidrefrigerantB.emulsifytheoilinthecondenserC.freezeinthekingvalveD.clogtheoiltrap1617Thetendencyofaflammableliqui

dtovaporizeisindicatedbyits____1617．可燃液体的蒸发趋势可以用闪点来表示A.ignitiontemperatureB.flashpointC.flammablerangeD.convectionindex1615A1616A161

7B1618Whenthepropellerbladesareintegralwiththehub,thepropelleriscalleda____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.suctionbackpropeller1619Moistureinarefr

igerationsystemcancause____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.corrosionofsystempipingC.impropertemperaturer

egulationD.alloftheabove1620Whichoftheproblemslistedcouldbeindicatedifasightglassintherefrigerantliquidlineisfullofbubbles?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.Insufficientrefrigerant.D.Solenoidvalvestuckopen.1621Whichofthefol

lowingstatementsdescribesthefunctionsofareservoirusedinahydraulicsystem?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.Trapfore

ignmatter.C.Separateairfromtheoil.D.Alloftheabove.1618B1619D1620C1621D1622Comparedtoaconstantpitchpropeller,acontrollablepitchpro

peller____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.moreefficientlyusesavailableengi

nepowerB.operatesatalowerefficiencyatafixedspeedC.producesthesametorqueatlowerenginepowerD.developsitsratedpoweratalowerspeed1623Aliquid

indicatorsightglassisusefulindeterminingwhetherornotarefrigerationsystemissufficientlycharged.Itisgenerallylocatedi

nthe____1623，制冷系统示液镜位于高压液态管路。A.highpressureliquidlineB.lowpressureliquidlineC.highpressurevaporlineD.lowpressu

revaporline1624Onedistinctadvantageofflashtypeevaporators,ascomparedtomostotherevaporators,isthatinaflashevaporator____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.scaleformationisnotasevereproblemC.coldshockingismo

reeffectiveinremovingscaleD.waterpurityisgreatlyincreasedathighcapacity1622A1623A1624B1625Dualelectro-hydraulicstee

ringunitsusuallyoperate____1625．电动液压舵机工作时，有一台泵处于备用状态。A.withbothpumpsonlineatthesametimeB.withonepumponstandbyC.withthefollow-upgeardi

sconnectedD.onlywhentheredderismovedamidships1626Ifaliquidsightflowindicatorinarefrigerationsystemshowsgasbubblesin

motionpassinginsideoftheglass,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.oilentrainedintherefrigerantC.lesst

hanafullchargeofrefrigerantinthesystemD.icecrystalsformingintherefrigerant1625B1626C1627Thebilgesystemhasbe

enperformingwell;however,theaftst~engineroombilge-wellsuddenlyfailstobepumpedout.Whichofthefollowingshouldbedonefirsttodeter-minethecau

se?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.Openthebilgepumpforinspection1630B.Remo

veeachofthemanifoldvalves.1631C.Removeonlythemanifoldvalvetotheaffectedbilge-well.1632D.Attempttopumpoutanotherbilgewelltodetermineiftheentiresyste

misaffected.16331628Ifonehydraulicpumpofanelectro-hydraulicsteeringunitfails,thevessel'ssteeringcanbeini

tiallyandbestmaintainedbyusingthe____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.trickwheelB.accumulatorC.standbypumpD.telemotor1

6361629Asightglassisinstalledintheliquidlinetoindicatetheconditionoftherefrigerantchargeandmayalsoindicatet

he____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.moistureinthesystem1639C.conditionofthecompres

sorsuctionvalves1640D.condensertemperature16411627D1628C1629B1630Whichofthefilter/strainerunitslistedpermitsyoutoclea

nthedementwhileleavingthesystemontheline?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.Bypass1631Aliquidsightflowindicatorinarefrigerations

ystemisexaminedandgasbubblesarenotedinmotionwiththefluidflow.Thismeans____1631．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.icecrystalsareformingintherefrigerantD.the

systemcontainslessthanafullchargeofrefrigerant1632Lessscaleformationoccursinaflashevaporatorthaninasubmergedt

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.noboilingoccursonheattransf

ersurfacesC.evaporationoccursatahigherrateD.theincomingfeedisatahighertemperature1630B1631D1632B1633V

esselpropellersareclassifiedasbeingrighthandorlefthand.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.thestarboardside1634Theprimaryreasonlowpressureevaporatorsproduce

distillatemoreefficiently,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.evaporationisaccomplishedinavacuumB.duetothehighertemperatureoftheincomingfeedC.duetothelatentheatofevaporationprincipleD.evap

orationinasubmergedmediumproducesmoredistillate1633B1634A1635Iftherefrigerationcompressorcrankcaseissweating,thecausemay

bedueto____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.liquidrefrigerantreturningtothecompressor

D.thecompressorshortcyclingonthehighpressurecutout1636Whennormaloperatingpressureisappliedtothehydraulicoilusedinahigh-p

ressuresystem,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.volumewilldecreaseD.po

urpointwillbereduced1637Mostsolenoidvalvesareactuatedby____1637．绝大多数电磁阀是受电磁铁的作用来工作的。A.aspringB.anelectromagnetC.theforce

ofgravityD.refrigerantpressure1635C1636C1637B1638Increasedinternalleakage,inadditiontopoorhydraulicsystemresponse,andinadequatelubr

ication,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.pumpbearingsinpoorconditionB.excessivelywornactuator-pistonpackingC.broken

directionalcontrolvalvecenteringspringsD.lowhydraulicoilviscosity1639Thestructuralmembersofthehullextendinginaforeandaftdirecti

onarecalled____1639．沿船舶首尾方向布置的结构件，称为纵梁。A.framesB.joinersC.longitudinalsD.knees1640Whenthereisnomovementoftheramso

nanelectro-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.onthepu

rgeandventstrokeC.intheneutralpositionD.rotatingbackwards1641Whichcharacteristicorconditionwillhavet

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

ssure1638D1639C1640C1641D1642Rotationofthesteeringwheelonthenavigationbridgeinitiatesoilpressurebeingappliedtoth

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-way

valveB.movingtheautomaticdifferentialvalveC.movingthereceivingtele-motorwhichregulatesthetwo-wayvalveD.varyingtheangleofatilti

ngboxoreccentricityofafloatingring1643Aknockingsoundfromonecylinderofanoperatingaircompressorindicates____164

3．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.noco

mpression1644Sluggishresponseoractionofthehydraulicactuatorsmaybearesultof____1644．液压油粘度过高会引起系统反应迟钝。A.insufficientload

B.excessivelyhighoilviscosityC.relief-valvepressuresettingtoohighD.reservoirlevelbeingmaintainedtwoinchesabove

normal1642D1643B1644B1645Aswingcheckvalveisusedinapipelineto____1645．管系中单向阀只允许流体以一个方向流动。A.maintainapresetpressu

reonthelineB.closelyregulatetheamountofflowC.relieveexcessivepressureonthelineD.allowflowinonedirectiononly1646Whenthedesiredrudderangleisattain

edbyatypicaldoubleramelectro-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.ramreliefvalvesbypassoiltos

topruddermovementB.six-wayvalveshiftstotheneutralflowpositionC.steeringpumpelectricmotorisde-energizedbythetransferswitchD.follow-upgeartakest

hehydraulicpumpoffstroke1647Arefrigerationsystemcompressorcrankcaseissweatingorunusuallycold.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.anaccumulationofliquidrefrigerantinthecrankcase.D.ashortageofoili

nthecrankcase1645D1646D1647C1648Operatingarotarypumpatspeedsinexcessofdesignrequirementscouldcause____1648．旋涡泵超速运转

，会引起剥蚀和过度磨损。A.decreasedclearancesbetweenrotatingpartsB.decreasedslippagetothesuctionsideofthepumpC.airbindi

nginthedischargeportsD.erosionandexcessivewear1649Refrigerationsystemcompressorcrankcasesweatingisanindicationof____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.insufficientlubeoilcirculatingthroughthesystemB.excessivecirculationo

flubeoilthroughthesystemC.insufficientrefrigerantinthesystemD.anoverworkedcompressor1650Whichbearingwillcarrytheloadontwosmallpointsdiametricallyo

ppositetoeachother?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.Ball1648D1649B1650D1651Sweatingo

ftherefrigerationsystemcompressorcrankcaseiscausedby____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.suction

pressuretoolowD.excessiverefrigerantreturningtothecompressor1652Anincreaseinrotorclearancesinarotarypumpwill____1652．旋涡泵转子间隙增大会引起泵排量减少。A.increase

dischargepressureB.decreasepumpcapacityC.decreasepumpcavitation,D.decreasereactionringclearance1653Theinternalforce

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

thD.ultimatetensilestrength1654Inanelectro-hydraulicsteeringsystem,reddermovementismaintainedinclosesynchronizationwiththeste

eringwheelpositionbymeansofthe____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.Rapsonslide1651D1652

B1653A1654B1655Crankcasesweatinginarefrigerationsystemiscausedby____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.toomuchsuperheat1656Ifarefrigerationsystem

compressorcrankcaseissweating,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.adjustthethermalexpansionvalve

tothepropersettingC.adjustthefloatvalvetotheproperholdingpressureD.openthehandexpansionvalve1657Amultistagecen

trifugalpumpcanbeBESTdescribedashaving____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.twoormoreimpellershousedtogetherinoneca

singandmountedonasingleshaftB.asinglesteppedimpellermountedinaprogressivelystagedcasingC.alargeradialclearancebetweenthei

mpellerandcasingtopreventoverheatingduetofrictionD.anincreaseinthedischargevelocityoftheliquidwithacorrespondingdecreas

einpressurethroughthestages1655C1656B1657A1658Propellerpitchspeedminusshipspeeddividedbythepropellerpitchspeedistermed

____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.propulsiveefficiency1659Whichofthedeviceslisted,whenuse

donanelectro-hydraulicsteeringgear,keepsthemovementofthereddercloselyinstepwiththesteeringwheel?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.Thesynchronouselectrictransmitter.D.

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

saturationtemperatureD.watervaporsuperheat1658A1659A1660A1661Ifanaircompressorisusedtosupplycompressedairtooutletsthroughoutthe

engineroomandondeckofavessel,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.combus

tioncontrolairsystemB.supplyairsystemC.ship'sserviceairsystemD.lowpressuredeckairsystem1662Whenitisnecessarytoopenarefrigerationsystemforrepairsandt

hesystemwillbeopenformorethanafewminutes,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.purg

edC.pluggedD.evacuated1663Ifanaircompressorisusedtosupplyairprimarilytothecombustioncontrolsystemandotherpneumaticcontrollers,theent

iresystemisknownasthe1663．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.controlairsystemB.forceddraft

airsystemC.supplyairsystemD.shipsserviceairsystem1661C1662C1663A1664Acrackeddiaphragminathermostaticexpansionvalvewillcausethevalveto1665__

__1664．热力膨胀阀膜片损坏将引起膨胀阀关闭。A.returntoaneutralpositionB.floodtheevaporatorC.openD.close1665Inordertodistributeth

esidepressuresoverawideareaofthecylinderwallsandliners,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-head1666Whichofthelistedoperatingconditionswouldhavethegreatestef

fectonthevolumetricefficiencyofanoperatingreciprocatingaircompressor?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.Thedensityofthe

airenteringthecompressor.B.ThetemperatureoftheairenteringthecompressorC.Thedesignedrotatingspeedofthecompre

ssor.D.Aleakingheadgasket.1664D1665B1666D1667Brokenvalvestripsinanoperatinglowpressure,aircompressorw

illcause1668____1667．空气压缩机阀片损坏将使排量下降。A.animmediatecrankcaseexplosionB.oilcontaminationinthecompressedairC.adecreaseincompressorcapacityD.

noimmediatelossofthecompressedaircapacity1668Whichoftheproblemslistedrepresentsthemajordifficultyencounteredwiththermalexpansionvalveo

peration?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.Moistureorforeignmattercollectingat

thevalveseatandorifice.C.Variablespringtensioncausedbythechangingtemperature.D.Frostontheliquidline.166

7C1668B1669Aviscousfilmofoilcollectedbetweenthevalvefaceandseatofalow1670pressurereciprocatingaircompressorwill____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.preventthevalvefromwiredrawingB.retardtheopeningandclosingofthevalveC.havenoeffectoncompressoroper

ationD.providequietervalveoperation1670Ifthepumpforahydraulicanchorwindlassisoverheating,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.excessivepumpdischargepressureC.toolowofatiltingboxangleD.l

owpumpspeed1669B1670B1671Ifarefrigerationcompressorwereshortcyclingonthelowpressure1672cutoutswitch,theprobablecauseforth

ismightbethe____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.highpressur

eswitchwasimproperlyadjustedC.expansionvalvestrainerswerefouledD.suctionvalveswereleakingslightly1672Thepartoftheanchorwindl

assthatengagestheanchorchainforliftingiscalledthe____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.capstan1673Airblowingf

romtheintakeairfilterofanoperatingaircompressorindicates____1673．空气压缩机进气滤器有空气吹出，则表明进气阀损坏A.brokeninletvalvesB.b

rokendischargevalvesC.pulsationsintheairdistributionsystemD.overloadingoftheairdistributionsystem1671C

1672C1673A1674ffarefrigerationcrankcasecompressorwereshortcyclingonthelow1675pressurecutoutswitch,thecausemigh

tbethatthe____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.syst

em'waslowonrefrigerantC.suctionvalveswereleakingslightlyD.reliefvalvewasleakingslightly1675Whichofthefollowingpro

blemswouldbetheprobablecauseforthefaultyoperationofareciprocatingaircompressorsuctionvalve?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.C

arbonbuildupinthepistonringbelt.B.Faultyoperationofacylinderun-loader.C.Compressoroperationinanareaofhighrelativehumidity.D.Lift

ingofintercoolerreliefvalve.1674B1675B1676Inwhichofthelistedhydraulicsystemswilltheinstallationofanoil1677coolerbenecessary

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

ystem.1677Whichofthefollowingproblemscouldcauseairtoblowoutthroughtheinletairfilterofarunningcompressor?1677．见第1673题。A.Excessivecompressio

ninthecylinder.B.Abrokenintakevalve.C.Adirtyinletfilterelement.D.Animproperlyadjusteddischargevalve.1678Arefrigerationunitwilltendtosho

rtcyclewhenoperating____16791678．制冷装置在低负荷运转时，容易产生压缩机起、停频繁。A.underheavyloadsB.duringhotgasdefrostC.underlightloadsD.duringstartingcon

ditions1676A1677B1678C1679Avacuumisinitiallycreatedinaflashtypedistillingplantby____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.theflashingofthefeedwat

erB.thecondensationofthesaltwaterfeedC.airejectors,eductors,oraseparatevacuumpumpD.condensationofthedistillate1680Whatcolori

susedtoindicatethelastshotofanchorchain?1680．锚链的最后一节是用红色来表示。A.RedB.WhiteC.BlueD.Yellow1681Whichofthefollowingpr

oblemscanresultinbelownormalpressureinthe1682intercoolerofanoperatinglowpressureaircompressor?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.Le

akingdischargevalvesonthelowpressurecylinder1679C1680A1681D1682Ifarefrigerationcompressorisshortcyclingo

nhighheadpressure,youshould1683____16841682．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.

checkforproperwaterflowthroughthecondenserC.increasethehighpressurecutoutsettingD.reducethecoolingwaterflow1683Mostpumpmanufac

turersrecommendedthatthedischargepipingforcentrifugalpumpsbe____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.thesamesizeasthepumpdischargenozzleC.onesizesmallerthanthepumpdisc

hargenozzleD.installedwithashortradiuselbowatthepump1684Excessivelylowairpressureoccurringintheintercoolerofareciprocatingaircom

pressoriscausedby____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.leakydischargevalvesontheLPcylinderB.leakydischargevalv

esontheHPcylinderC.insufficientintercoolercoolingD.lowambientairpressure1682B1683A1684A1685Therefrigerationcompressorinawat

ercooledrefrigerationsystemisshortcycling1686onthehighpressurecutoutswitch.Onereasonforthiscouldbethe____1

685．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.highpressurecutoutswitchisimpr

operlyadjustedC.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.firststage

flashchamberB.secondstageflashchamberC.firststageaftercondenserD.secondstagedistillingcondenser1687Mostpumpmanufacturersrecommendthat

thesuctionpipingdimensionforcentrifugalpumpsbe____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.thesamesizeas

thepumpsuctionnozzleC.onesizelargerthanthepumpsuctionnozzleD.installedwithashortradiuselbowatthepump1685B1686D1687C1688Whichofthefollowingstateme

ntsaboutpumpoperationsisNOTacorrect1689statement?1688．“物质温度低才能泵送”这一说法显然不正确。A.Inorderforafluidtobepumped,afluidmustbemadetoflow.B.Asu

bstancemustbecoldinorderforittobepumped.C.Thekineticenergyimpartedbythepumpcanbeusedtoforcealiquidthroughahydraulicsystem.D.Apumpmustr

eceiveitsenergyfromanexternalsource.1689Whichofthefollowingprecautionsshouldalwaysbecarriedoutindrydock?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.Liquidsshouldneverbetransferredbetw

eentankswithoutconsultingthedockmaster.B.Ifseavalveshavebeendisassembled,allbonnetsmustbecheckedforleakagewhentheshipis

re-floated.allseacheststrainersshouldbeverifiedashavingbeenreplaced.C.Beforere-floating,D.Alloftheabove.1688B1689D1690Ifanelectr

icmotordrivenaircompressorfailstostart,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.jammedsucti

onvalveC.trippedoverloadrelayD.brokendischargeun-loader1691Machinerydrivingfueloiltransferandfueloilservicepumpsmustbe1692fittedw

itharemotemeansofstoppingthemachineryfrom____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.outsidethespaceconcern

edC.thethrottlestationD.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.holdingthed

ischargevalveopenB.relievingtheintercoolerpressuretotheatmosphereC.usinganenlarged,permanentlyopenedclearanceex

pansionspaceD.apre-chargedaccumulator1690C1691B1692B1693Withregardstofluidflowcontrol,anadvantageofpne

umaticcontrol1694systemsoverelectricalcontrolsystemsis____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.practicallynolimittothepowerava

ilableforagivensystemB.notransmissionlossesC.lowenergyinputD.continuedcontrolthroughtemporaryelectrica

lpowerlosses1694Flexiblehoseunderpressureinahydraulicsystemwill____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.ex

pandinlengthandindiameterC.contractinlengthandexpandindiameterD.flexatrightanglestotheappliedpressure1695Whichofthefol

lowingstatementsdescribestherelationshipbetweenflashpointandignitiontemperature?1695．着火点总是比闪点高：A.Bothar

ehigherthannormalburningtemperatures.B.Theflashpointisalwayshigher.C.Theignitiontemperatureisalwayshigher.D.Theyarenotnecessarilyrelated.1693D1694C1

695C1696ffarefrigerationcompressorwillnotstart,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.thepre

ssureregulatingvalveisnotclosingB.anexcessivelackofrefrigerantinthesystemC.badlyleakingdischargevalvesD.wornpistonrings1697Th

elowesttemperaturerequiredtocauseserf-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.combustiontemperature1698Thepurposeofthewearingringsused

inacentrifugalpumpisto____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.preventaninternalexplosioninthepumpwhenitisoverheatedB.enable

avisualinspectionofthepumpwhileitisrunningC.insureaproperalignmentofthepumpcouplingtothedriverD.accommodateforfrictionbetweentheimpellerandth

ecasing1696B1697C1698D1699Whenarefrigerationcompressormotorfailstostart,theFIRSTthingthat1700shouldbe

checkedforisa____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.lowdifferentialsettingontheH.P.cutoutC.blow

nfuseinthemotorcircuitD.faultysuctionpressureregulator1700Aircompressorsareequippedwithunloadingsystemsfor

thepurposeof____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.relievingintercoolersofhigh

temperaturebuildupsC.providinghighstartingtorqueinthedrivemotorD.seatingvalveplatesduringcompressorshutdown1699C1700A170

1Thesimplestmethodtousefordeterminingifacentrifugalpumpis1702operatingasdesigned,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.closeoffthedischargevalve,andwatchforariseinpressureC.momentarilyclos

eoffthesuctionvalve,andwatchforariseinpressureD.useaclamponammeterandcompressthereadingtopastrecords1702Whichofthefo

llowingstatementsconcerningbutterflyvalvesiscorrect?1702．对于蝶阀，只要转动手柄1／4转，就能关闭阀门。A.Specialtoolsarerequiredforlappingor

grinding.B.Itisimpossibletothrottleflowwithabutterflyvalve.C.Toclosethevalve,itisonlynecessarytoturnthehandleaquarterofatu

rn.D.Thebutterflyvalveshouldneverbeusedinafreshwatersystem.1701B1702C1703Ifalargedifferenceexistsbetweenthecompresso

rdischargepressureandthepressurecorrespondingtotheexistingcondensingtemperatureinarefrigerationsystem,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.increasetheflowofthecoolingwaterthroughthecondense1706B.a

djustthehighpressurecutouttomaintainthedesiredpressure1707C.openthehotgasbypasstemporarilytoreducecapacity1708D.purgenon-condensablegasesto

reducetheexcesspressure17091704Pressureinanoperatinghydraulicsystemisdeveloped____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.onlybythepum

pasitsprimaryfunction1712B.byresistancetothefluidflowthroughthesystem1713C.bythethermalinputtothesystem'sfluid1714D.solelyby

thechargeappliedbytheaccumulators17151703D1704B1705Theaccumulationofairandothernon-condensablegasesinarefrigerationsy

stemwill____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.causealossoftheliquidsealB.createavaporlockintheliquidreceiverC.collectinthecondense

rD.causefoamingoftheoilinthecrankcase1706Whichpumpinstallationwouldrequireanexternalsourceofsealingwater?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.Bi

lgepump.1707Alubeoilfiltercanbeusedtoremovemostcontaminantsfromlubeoil.Acontaminantwhichwillremaininthelubeoilafterfilteringis____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.water1708Wheni

nstallingahydraulichose,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.Th

ehoseshouldnotbetwisted.B.Thehoseshouldbeprotectedwithasleeveifitissubjectedtorubbing.C.Thereshouldbesomeslackin

thehose.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.abnormallycoldreeferboxes1710Thepresenceofbubblesina

refrigerationsystemliquidlinemay____1710．制冷系统液相管存在气泡，会携带水分并导致腐蚀。A.promoterefrigerantdehydrationB.beabsorbedinthereceiverC.causelowcondensingpress

ureD.carrymoistureandleadtocorrosion1709B1710D1711Dirtshouldnotbeallowedtocontaminateagreaselubricantbecause1712the____..

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.bearingswillleakoilexcessivelyC.dirtisveryabrasivewhenmixedwithgreaseD.grea

sewillbecomeinflammable1712Thefunctionofacentrifugalpumpdoublevolutecasingisto____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.reduceradialthrus

ttotheimpellerB.doubletheliquidvelocitythroughthepumpwhencomparedtoasinglevoluteC.reducehydraulicendthrustD.providetheeffectofmult

i-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.Allo

ftheabove1711C1712A1713D1714Whichofthelistedstatementsisacharacteristicoftheliquidchargedpower1715elementusedwiththermostaticexpansionvalves?1

714．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.Theliquidrefrigerant

tendstocollectatthebellowsordiaphragmandreducesthevalvesensitivity.C.Thesensingbulbisemptyofliquidrefrigerantcharg

eatthedesignedoperatingtemperature.D.Thesensingbulbisneveremptiedofliquidrefrigerantundernormaloperatingconditions.1715Thevalvebestsuitedforthr

ottlinggasorliquidflowinapipelineisthe____1715．最适于调节气体或液体流量的阀是球阀。A.gatevalveB.globevalveC.checkvalveD.plugco

ck1714D1715B1716Inordertoproperlyremoveairfromthecasingofacentrifugalpumpwhen1717starting,thepumpshouldh

avea____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.negativesuctionheadC.mechanicalsealD.ventvalveattachedtothecasingattheto

pofthevolute1717Scaleaccumulationonevaporatorheatexchangesurfaces____1717。造水机热交换表面上的水垢会减少热量传递。A.increasesbrinedens

ityB.increasesdistillatesalinityC.reducesmetalcorrosionD.reducesheattransfer1718Excessivecirculationofthelubricatingoilwiththerefrigeranti

narefrigerationsystemwillcause____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.carbondepositsonthecompressorsuctionvalvesB.theevap

oratortemperaturetoincreaseC.rapidcorrosionofthethermalexpansionvalveD.nooperatingproblems1716D1717D1718B1719Whi

chofthefollowingcentrifugalpumpcomponentsconvertstheliquid1720kineticenergyofvelocitytothepotentialenergyofpressure?1719．离心泵的涡壳将液体的动能转化为压力能。

A.ImpellerB.ElectricmotorC.VoluteD.Eye1720Sludgemayforminthecrankcaseofanairconditioningcompressorasaresultof____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.overheatingandoxidationC.loweredoperatingtemperaturesD.reducingthecloudorflashpoint1721Whichofthefollowin

gstatementsiscorrectconcerningthe"flashpoint"ofaliquid?1721．闪点总是比着火点低。A.Itislowerthantheignitiontemperat

ure.B.Itisthetemperatureatwhichasubstancewillspontaneouslyignite.C.Itisthetemperatureatwhichasubstance,whenignited,willcontinuetobum.D.

Itisthetemperatureatwhichthereleasedvaporswillfallwithintheexplosiverange.1722Ifyourvesselbums8tonsoffuelperhourat15kno

ts,howmanytonsperhourwillitbumat18knots?1722．M2=(Ｖ2／Ｖ１)３’Ｍl=(18／１5)３X8＝13．82(t)。A.13.82tonsB.15.61tonsC.16.00tonsD.1

6.37tons1719C1720B1721A1722A1723Thepercentageofimpuritiesinaspecificfueloilsampleisdeterminedby____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.sett

linginafueltankB.testinginalaboratorycentrifugeC.burninginacalorimeterD.testinginaclosedcup1724Whichofthe

listedcharacteristicscanbeappliedtoR-12vapor?1724．R12蒸汽是无色无味的。A.Itiscorrosive.B.Itisodorless.C.Itisvisibleasablu

efog.D.Ithasadistinctivetaste.1725Foamingoftheoilinarefrigerationcompressorcrankcaseiscausedby____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.lubeoilviscositybeingreducedbyrefrige

rantdilutionD.compressorsuctionpressuresuddenlyincreasing1726Excessivescaleformationinadistillingplantmayresultfrom____17

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

.impropervacuumregulation1723B1724B1725A1726D1727Inarefrigerationsystem,foamingofthecrankcaseoilmaycausethe____1727．制冷压缩机曲柄箱油泡沫会引起压缩机敲缸。A.expansio

nvalvetooverfeedB.compressortoknockC.waterregulatingvalvetofailD.crankcasedrainstoplug1728Thecentrifugalpumpcomponentresponsibleforc

onvertingthemechanicalenergyoftheliquidbeingpumped,tothatofkineticenergyisthe____1728．离心泵的叶轮将液体的机械能转化为动能，A.electricm

otorB.voluteC.impellerD.diffusionnozzle1729Excessiveoilfoaminginthecrankcaseofarefrigerationcompressorcanresultin___

_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.excesslubeoilviscosityC.excessdepositsonth

ecompressorpistonringsD.waxcrystalsforminginthelubricant1730Thebasicfunctionofthecentrifugalpumpimpelleristo____1730．离心

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

beingpumpedC.convertthepotentialenergyoftheliquidtokineticenergyD.separateairfromtheliquidbeingpumped1727B1728C1729A1730B1731Whichofthefol

lowingstatementsiscorrectconcerningatypicalshipboardmulti-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.Athermostaticexpansionvalveisusedtocontr

olrefrigeratedspacetemperature.C.Refrigeranttemperatureinanevaporatorisdirectlyrelatedtorefrigerantpressure.D.Dehydratorsmustbeusedcon

tinuouslyinarefrigerationsystem.1732Oneoftheconsequencesincontinuingtooperateacentrifugalbilgepumpwi

ththedischargevalveclosed,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.mot

orwilloverheat1733Thesuddenreductionofpressureoccurringwithinthecrankcaseofarefrigerationcompressorduringstarting

causesthe____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.suddenevaporationofentrappedair

inthelubricantC.releaseofrefrigerantfromtheoil/refrigerantmixtureD.releaseofdissolvedlubricantfromtherefrig

erant1731C1732C1733C1734Ifanoperatingbilgepumpisdevelopinggoodvacuum,butisunabletodischargeanywater,whichofthefollowingproblemsis

themostprobablecause?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.Thesuctionstrai

nerisclogged.1738C.Thedischargevalveisclogged.1739D.Theshaftisworn.1735Acentrifugalpumpproducesfloww

itharesultingdischargeheadbyenergyconversion.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.mechanicalenergytokineticenergytopotentialenergyB.mechanicalenergytopotentialenergytokineticenergyC.poten

tialenergytomechanicalenergytokineticenergyD.kineticenergytomechanicalenergytopotentialenergy1734B173

5A1736Thesizeofballandmilerbearingscanbeidentifiedbythe____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'snumer

icalcodeD.outerringwidth1737Anadvantageofahelicalgearpumpoverasimplegearpumpisthatthehelicalgearpumpiscapableof____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.operatingforlongerperiodsoftimeD.producingasmoot

herdischargeflow1738Refrigerantisnormallysub-cooledinarefrigerationorairconditioningsystemcondenserto____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.prohibitflashingintheliquidlineC.reducerefrigerantvolumeinthesy

stemD.reducecompressordischargelineloading1736C1737D1738B1739Theprincipalpurposeofsub-coolingliquidrefrigerantpriortoi

tsentering1740theexpansionvalveisto____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

.allowtherefrigeranttoenterthethrottlingdeviceinasaturatedconditionC.increasetherefrigeratingeffectbyincreasingth

eamountofflashgasD.minimizethetemperaturedropoftheliquidasitpassesthroughthesolenoidvalvetotheoutletside1740Ifabi

lgepumpisabletodevelopvacuum,butisunabletosufficientlypumpoutthebilges,youwouldcheckforallofthefollowingEXC

EPT____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.forleaksinthesuctionpipingC.reliefvalveisnotproperlyseated

D.thesuctionstrainer1741Sub-coolingisamethodofreducingthetemperatureoftheliquidrefrigerantbelowits____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.compressiontemperature1739A1740A1741C1742Somevesselsareequippedwithawater

lubricatedstemtube.Whenatsea,operating1743undernormalconditions,thewaterservicevalvefromtheship'ssaltwatersystemtothebearingshould

be____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,andnoleakagepermittedacrosstheshaftpackingB.

closed,andonlyslightleakagepermittedacrosstheshaftpackingC.open,andnoleakagepermittedacrosstheshaftpackingD.open,andonlyslightleakagepe

rmittedacrosstheshaftpacking1743Undernormalconditions,therefrigerantentersthecompressorinanoperatingrefrigerationsystemasa___

_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.superheatedvapor1744Anexcessiveamountofwaterispreventedfromenter

ingavesselusingawaterlubricatedstemtubebearingbytheuseofthe____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.sh

aftpackingD.labyrinthseal1745Refrigerantentersthecondenserasa____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.lowpressu

revaporC.highpressurevaporD.lowpressureliquid1742B1743D1744C1745C1746Ifthepumpforahydraulicanchorwindlassisov

erheating,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.excessivedrivemotorspeedB.excessivepumpdischargepressureC.

toolowofatiltingboxangleD.insufficientdrivemotorspeed1747Anindependentbilgesuctionisrequiredfor____1

747．机器处所的舱底吸口是独立式的。A.ballasttanksB.sludgetanksC.machineryspacebilgesD.cargoholdbilges1748Inaflashdistillingunit,evaporatorfeed(seawa

ter)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.vaporfeedheaterB.airejectorcondenserC.saltwaterh

eaterD.distillatecooler1749Thefunctionoflubricatingoilisto____1749．滑汕的作用是减少运动部件之间的摩擦。A.reducefrictionbetweenmovi

ngsurfacesB.provideevendistributionofbearingwearC.reducetheaccumulationofharmfuldetergentsD.maintainaconstantoiltempera

tureoutputateachbearing1746B1747C1748D1749A1750Adirtyintercoolerontheshipserviceaircompressorwillresultin____1750．船用空压机的中冷器脏了，会导致功率消耗增大。

A.decreasedcompressionratioB.higherthannormalpowerconsumptionC.un-loadermalfunctionD.waterinthelubricatingoil1751Whichofthelistedconditionswi

llcausethefeedwater,thathasnotflashed1752tovaporinthe____first-stageofaflashevaporator,toflowintothesecond-sta

ge71751．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.Differenceinbr

inedensitybetweenfirstandsecondstages.D.Lowerpressureinfirst-stage.1752Undernormaloperatingconditions,thehighestte

mperatureandpressureconditionsexistinginaflash-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.distillate

coolerD.saltwaterfeedheater1750B1751B1752D1753Adirtyintercooleronanaircompressorwillcause____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

-loaderoperatingdiaphragmB.anincreaseincurrentflowtothemotorC.highpressureinthereceiverandfilterD.anexcessiveconsumptionofcrankcaseo

il1754Theeffectofhighvaporsuperheatinarefrigerationsystem,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.increasedcapacityofthecompre

ssorB.moreefficientoperationofthethermalexpansionvalveC.decreasedcapacityofthecompressorD.lossofreceiver

capacity1755Excessivelubeoilconsumptionbyareciprocatingaircompressorcanbecausedby____1755．对于往复式空压机，滑油油位过高会引起油耗增加。A.us

ingaslightlydirtyairfilterB.usingoilhavinganexcessiveviscosityC.intercoolerorafter-coolerleaksD.carryingtheoi

llevelhigherthannormal1753B1754C1755D1756Inwhichofthelistedrefrigerationsystemcomponentsdoessuperheating1757oftherefrigeranttakeplace?1

756．在制冷系统的蒸发器中，制冷剂发生过热。A.ExpansionvalveB.EvaporatorC.DrierD.Receiver1757Thevacuummaintainedinthesaltwaterfee

dheatershellofaflash-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.adirectunimpededc

onnectionbetweensecondstageandsaltwaterfeedheaterC.eitherbyvacuumdragoranexternallinefromthefirststageviaafixedorificeD.thefixedorificeprovidedi

nthesteamsupplyline1758Inarefrigerationsystem,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.thesolenoidvalvedifferen

tialpressureD.thesuperheatoftherefrigerantinthetailcoil1756B1757C1758D1759Therefrigerantgasreturningtothecompressorshouldbe____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,thecausemay17

61bea____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.defecti

vepopvalve1761Thelowpressuresideofarefrigerationsystemisconsideredtoexistfromthe____1761．制冷系统中的低压侧是从膨胀阀到压缩机。A.expansionvalvet

othecompressorB.receivertotheexpansioncoilC.expansionvalvetotheevaporatorD.condensertotheexpansionvalve1762Thec

omponentofarefrigeratingsysteminwhichtherefrigerantvaporizesandabsorbsheatisknownasthe____1762．制冷剂在蒸发器中蒸发并吸收热量。A.condenserB.vaporgenera

torC.accumulatorD.evaporator1759A1760B1761A1762D1763Inwhichoftheareaslistedwouldyouexpecttofindthehighestsalt1764concentrationinaflashev

aporator?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.Saltwaterheaterdischarge.C.First-stag

einternalfeedbox.D.Second-stageinternalfeedbox.1764AnACsynchronoustransmissiontyperemotesteeringcontrolsystemconsistsofa____1764．舵机遥控系统中有发送器和接收器。A.

transmitteratthesteeringstationandareceiveratthesteeringengineB.reversiblemotoratthesteeringstationgeare

dtothesteeringpumpsC.smallinductionmotoronthebridgewhichcontrolstherudderthroughpulleysD.variabledispla

cementhydraulicpumpdrivenbyareversibleDCmotor1765Tooperateacentrifugalfirepumpatreducedcapacity,youshould____1

765．离心式消防泵在低排量工作时，应关小排出阀A.readjustthereliefvalveB.throttlethesuctionlineC.throttlethedischargevalveD.opentheprimingline1763D1764A1765C176

6Whichofthefollowingbestdescribesthethermodynamiceffectonthe1767pressureandvolumerelationshipwithregardstosaturatedgases?l766．对于饱和气体而言，压力减少，体

积增大。A.Aspressuredecreases,volumeincreasesB.Asvolumeincreases,pressureincreasesC.Asvolumedecreases,pressuredecreasesD.Aspressureincreases,volumeincre

ases1767Thedischargerateorcapacityofacentrifugalpumpwillvarydirectlyasthe____1767．离心泵的排量随叶轮直径的改变而变化。A.chan

geintheimpellerdiameterB.squareoftheimpellerradiusC.cubeoftheimpellerdiameterD.impellerefficiencyforlargechangesini

tssize1768Whenoperatingwithanegativesuctionhead,whichofthefollowingtypesofpumpswillrequirepriming?l768．离心泵不具有干吸能力，运行前需要灌水。A.Reciprocatin

gB.CentrifugalC.RotaryD.Gear1766A1767A1768B1769Therefrigerantleavestheevaporatorofarefrigerationsystemasalow1770pressure____1771l769

．制冷系统中，蒸发器出口是低压过热蒸汽。1772A.sub-cooledliquidB.hightemperatureliquidC.oilsaturatedliquidD.superheatedvapor1770Reducedcapacity,a

ccompaniedbyvibrationandnoiseatthesuctionofacentrifugalpumpisaresultof____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.wate

rhammerC.fluidfrictionD.steamknock1771Inordertoaccuratelymeasureverylowpressures,whichoftheinstrumentslistedshouldbeused'?

1.1771．压气计可精确测量很低的压力。2.A.CompoundgageB.BourdontubeC.ManometerD.Deadweightgage1772ffacentrifugalbilgepumpwerecontinual

lyoperatedwiththedischargevalveclosedthe____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.reli

efvalvewouldopenC.pumpwouldeventuallyoverheatD.motorwouldoverheat1773Whichofthelistedpressurecontrolvalveswou

ldbeusedtoestablishthemaximumoperatingpressureofahydraulicsystem.?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.1769D1770A1771C1772C1773D1774Thetemperatureofarefrigerantgasisthehighest____

1774．制冷系统中，压缩机排出口的制冷剂气体温度最高。A.atthecompressordischargeB.atthecompressorsuctionC.intheexpansionvalveD.inthereceiver1775Condensateformedwith

inthefirst-effecttu~nestofadouble-effect,low1776pressureevaporator,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.c

rossoverpipeC.condensateseparatorD.drainpump1776Acentrifugalpumpattemptingtodevelopflowagainstacloseddischargevalvehasa

/an____1776、排出阀关闭时，离心泵的排量为零。A.capacityof0%B.efficiencyof100%C.internalslippageof0%D.shutoffhorsepowerra

tingof100%1777Acompoundgageisusedtomeasure____１７７７、组合式压力表可测量压力和真空度。A.temperatureandpressureB.humidityandtemperatureC.pressurean

dvacuumD.pressureandhumidity1774A1775D1776A1777C1778Whichofthelistedcomponentsisconsideredtoseparatethehighpressure1779sideofare

frigerationcyclefromthelowpressuresideofthecycle?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.Thecondenserandtheexpansionvalve.B

.Thekingvalveandthesolenoidvalve.C.Thecompressorandtheexpansionvalve.D.Thecondenserandthesolenoidvalve.1779Which

ofthelistedrefrigerationsystemcomponentskeepstherefrigerantcirculatingthroughthesystem?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.1778C1779D1780B1781Excessiveoilfoaminginthecrankcaseofarefrigerationcompressoratstartup1782cancause____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.compressordamagefromimproperlubricationB.refrigerantabsorptionbythelubricantC.increasedviscosityinthelu

bricantD.carbondepositonthecompressorsuctionvalves1782Whichofthelistedstatementsiscorrectconcerningthestartingofcentrifugalpumps?1782。离心泵启动时，排出阀应关

闭，即封闭启动。A.Theyshouldalwaysbestartedwiththedischargevalveclosed.B.Theyshouldalwaysbestartedwiththedischargevalveopened.C.Apr

imingpumpisalwaysrequiredtofloodtheimpellersuction.D.Theyshouldalwaysbestartedwiththesealinglinevalvesclosed.1783Acompoundgageistypicallyi

nstalledonthe____1783．组合式压力表一般安装在舱底水泵的吸人侧。A.suctionsideofabilgepumpB.exhaustmanifoldofanauxiliarydieselC.discha

rgelinefromanaircompressorD.chemicalfeedtankofanevaporator1781A1782A1783A1784Whenrefrigerantleavesthereceiver,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.compressorD.condenser1785Thetypeofgagemostcommonlyusedtomeasurepressureisthe____1785．压力测量通常使用

波登管式压力表。A.bimetallictypeB.diaphragmtypeC.bourdontubetypeD.resistance-temperaturetype1786Whichofthefollowingstatementsistrueconcerni

ngcentrifugalpumps?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.Theyarestartedwitht

hedischargevalveopened.C.Theflowofliquidisdevelopedbyimpartingenergyduetotherotationofanimpeller.D.Theyarealwaysmountedinahorizo

ntalposition.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.compressorB.co

ndenserC.expansionvalveD.evaporator1784B1785C1786C1787A1788Thetemperatureoftherefrigerantintheevapor

atorcoildependsmostly1789uponthe____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.co

olingwatertemperaturetothecondenserC.heatloadintherefrigeratorcompartmentD.solenoidvalveintheliquidline1789Wh

ichofthefollowingtypesofhydraulicpumpswouldbeusedinasteeringsystem?1789．在舵机系统中，可采用轴向或径向柱塞泵。A.LobeB.Scr

ewC.RadialpistonD.Volute1790Anincreaseintheheatloadtoarefrigerationsystemwillcause____1790．制冷系统热负荷增加会引起吸人温度增加。A.thesuctionpressuretodecre

aseB.thesuctiontemperaturetoincreaseC.increasediceformationontheevaporatorcoilD.excessiveshortcyclingofthecompressor1788A1789C1790B1791Th

edischargeheadofacentrifugalpumpwillvarydirectlywiththe1791．离心泵的排量与叶轮直径的平方成正比。A.changeinimpellerdiameterB.squareofthei

mpellerdiameterC.cubeoftheimpellerdiameterD.impellerefficiencyforlargechangesinthesizeoftheimpeller1792Tothoroughly

pumpoutthebilgesusingahorizontallymountedcentrifugal1793pump,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.pumpmust

alwaysbeprimedB.volutemustimpartaradialandrotarymotionofthewatersuctionsideC.connectionmustguidetheliquidtothelanternringsD.stu

ffingboxshouldnotbeallowedanywaterleakage1793Whichofthefollowingtermswouldbestdescribethetemperatureatwhichaliquidboilsatagivenpres

sure?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.Superheatedtemperature.D.Degr

eeofsuperheat.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.higherboilingtemperatureforagivenpress

urethandoesapurerefrigerantB.lowerboilingtemperatureforagivenpressurethandoesapurerefrigerantC.boilingpressureequaltothat

ofapurerefrigerantatagivenpressureD.boilingpointwillnotbeaffectedbyentrainedoil1795Machineryoperatingfeaturesaredesignedtoh

elpconserveenergy.Whichofthe1796followingresultswillnotcontributetoenergyconservation?1795．“冷却器出口温度升高”不涉及能量转换。A.Reductionoffrictio

n.B.Insulationofhotsurfaces.C.Lubricationofmovingparts.D.Elevationofcooleroutlettemperatures.1796Onwhichofthefollowinghe

atedsurfacesofaflashtypeevaporatorwouldyoubemorelikelytofindsoftscaleformation?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.Flashchamberverticalsurfaces.D.Distillingcondensertubes.1794A1795D1796A1797S

trainersarecommonlyusedinhydraulicsystemsto____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.preventsolidpa

rticlesfromenteringthepmnpC.preventsolidparticlesfromenteringthefilterD.protectthedirectionalcontrolvalves1798Excessiveoilfoami

nginthecrankcaseofarefrigerationcompressoris1799mostlikelytooccurwhenthecompressor____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.suctionpressureisbelownormalC.oillevelisbelownormalD.startsafteralongidleperio

d1799Inacompressionrefrigerationcycle,thetemperatureoftheliquidrefrigerantexperiencesitsgreatestdecreaseinthe____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.condenser1797B1798D1799C1800Whichofthefollowingstatementsconcer

ningenergyiscorrect?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.Energymaynotbetransf

ormed.C.Thetotalquantityofenergyintheuniverseisalwaysthesame.D.Noneoftheabove.1801Bywhichofthefollowingmeansisforceefficientlyprovidedt

ovarythe1802pitchofthebladesonamodemcontrollablepitchpropeller?1801．调距桨一般采用液压调距机构。A.HydraulicB.Mechanical

C.PneumaticD.Electrical1802Whichofthelistedstatementsiscorrectconcerningrefrigerationsystems?1802．25t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.A25tonrefrigerationsystemhasthesamecoolingeffectasmeltin

g25tonsoficein24hours.C.Athermostaticexpansionvalveisusedtocontrolrefrigeratedspacetemperature.D.Theliquidreceiverfuncti

onstocollectandremovenon-condensablegases.1800C1801A1802B1803Whenthevessel'ssteeringwheelonthenavigationbridgeisturned,the1804differenceex

istingbetweenthepositionofthewheelandthatoftheredderisknownas____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.proportionalband

B.theerrorsignalC.theresetsignalD.feedback1804Whichoftheconditionslistedrepresentsthegreatesteffectofe

xcessfrostaccumulationontheevaporatorcoils?1804．蒸发盘管严重结霜将降低制冷装置的效率。A.Keepstherefrigeratedspacecooler.B.Reducestheefficiencyoftheplant.C.Takesthelo

adoffthecompressor.D.Hasnoaffectonthesystem.1805Inthedesignofhydraulicpipingandequipmentconsiderationisg

iventominimizeturbulenceinthehydraulicfluid,asthiswillcause____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.molecularf

luidvibrationB.energylossesC.widepressurevariationsD.mechanicaldamagetocontrolvalves1803B1804B1805B1806

Ifarefrigerationcompressorisrunningcontinuouslywithoutlowering1807thetemperatureintherefrigeratedspace,thetroublemaybe____18

081806．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.excessivecondensercoolingwaterD.

ashortageofrefrigerant1807Whichofthevalveslistedshouldbeusedeitherinthefullyopenedorthefullyclosedposition?1.1807．门

阀只能在全开或全关状态下工作。2.A.AgatevalveB.AglobevalveC.AnycheckvalveD.Anyneedlevalve1808WhichofthefollowingmodesofheattransferdoesNOTre

quireany____physicalcontactbetweenawarmerandacoolersubstance?1.1808．辐射传热不需要物体的直接接触就能实现。2.A.RadiationB.ConductionC.Naturalco

nvectionD.Alloftheabove1809Agatevalveinstalledinapipelineshouldbe____1.1809，门阀只能在全开或全关状态下工作。2.A.usedineitherthefullyclosedorfullyop

enedpositionB.installedwiththestemdownC.usedforsteamserviceonlyD.usedtothrottleorregulatetheflowofliquid180

6D1807A1808A1809A1810Themovementofheatwithinafluid,causedbytheapplicationofthermal1811energy,iscalled____1810，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-loadersenablethecompressorto____

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.startandcomeuptospeedbeforeaircompressionbegin

sC.changespeedaccordingtooverloaddemandsD.reducecompressedairchargedensity1812Whichoftheconditionslistedwi

llcausearefrigerationcompressortorunconstantlywithoutsimultaneouslydecreasingthetemperatureintherefrigeratedspace?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.Shortageofrefrigerantoil.B.Slightshortageofrefrigerant.C.Excessivecondensercoolingwaterflow.D.Faultyexpansionvalve.1810C1811B1812B1813Whi

chofthelistedmethodsofheattransfertakesplacewhentwosubstancesofdifferenttemperaturesareinphysicalcon

tactwitheachother?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.Eachoftheabove1814Theunloadingsystemonanaircompre

ssorwill____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.increasecompressorop

eratingspeedasnecessaryC.allowthemotortoturnthecompressoropposedonlybyfrictionD.reducethecompressorfrictionalloadwh

enstarting1815Awarmerthannormalcompressorsuctionlinemightbecausedby____1815．压缩机吸人管温度过高通常是由制冷剂不足引起，A.insufficientlubricationB.ins

ufficientrefrigerantC.excessrefrigerantD.excessiveopeningoftheexpansionvalve1813B1814C1815B1816Whichofthefollo

wingconditionsmustexistforheattoflowfromone1817objecttoanother71816．两种物体之间必须具有温度差，才能实现热量传递：A.Thetwoobjectsmustbeinphysicalcontact.B.Thetwoo

bjectsmustbethesamesize.C.Theremustbeanexistingtemperaturedifferential.D.Theremustbeanexistingweightdifferential.1817Intherefriger

ationsystem,ashortageofrefrigerantisindicatedby____1817．制冷系统中制冷剂不足通常表现为示液镜中有气泡；A.thecompressorshortcyc

lingonhighpressurecutoutswitchB.highsuctionpressureC.highheadpressureD.bubblesinthesightglass1816C1817D1818Condensatemus

tbedrainedfromtheintercoolerandafter-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.theco

olingeffectofthecondensatereducesthecompressor'sefficiencyB.adangerofexplosionexistswheneverwaterispre

sentinacompressorC.watercauseserraticoperationofpneumaticcomponentsD.thevolumetriccapacityofthefirstst

ageisreducedifwaterremains1819Ifarefrigerationsystemwereshortofrefrigerant,theconditionwouldresultin____1820、如果舵机系统液压油中含有空气，舵将反应迟钝。A.continuousrunni

ngofthecompressorB.highsuctionpressureC.highdischargepressureD,shortcyclingofthecompressoronthewaterf

ailureswitch1820Whenairbecomestrappedinthehydraulicfluidofasteeringsystem,the____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.redderwillrespondsluggishlyB.hydraulicramswillover-speedC.sightglasswillshowbubblesD.mmreliefvalveswilllift1818C1819A1820A1821Befo

restartingareciprocating,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.opentheliquidcylinderdrains1822T

heairchargeleavinganintercooler,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.sup

erheatedB.super-cc~ledC.atorbelowthedewpointD.Alloftheabove1823Noiseinarefrigerationcompressorcanbecausedby____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.toomuchoilincirculation

D.Alloftheabove1824Thermalenergyintransitionisalsoreferredtoas____1824．热能是以热量传递方式进行的。A.heatB.powerC.horsepo

werD.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.v

aporizesinthecondenserB.reachesthecompressorthroughthesuctionlineC.flashesintheliquidlineD.condensesinthereceiver1826Theenergyass

ociatedwithmoleculesisknownas____1826．与分子运动有关的能量称为热能。A.kineticenergyB.potentialenergyC.mechanicalenerg

yD.thermalenergy1827Overgreasingofballbearingsinstalledonpumpswillresultin____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.overheatingofthebearingC.reducedcorrosioninthebearingD.increasedpumpcapacity1828Airtrappedinthehydraulicfluid

ofasteeringsystemshouldbeindicatedby____1828．如果舵机系统液压油中含有空气，舵将反应迟钝。A.thepumpover-speedingB.animproperrudderresp

onseC.bubblesinthesightglassD.ramreliefvalveslifting1825B1826D1827B1828B1829Whiletroubleshootingarefrigerationsystemforlowheadpressure,18

30liquidrefrigerantfloodingbackfromtheevaporatorisdeterminedtobethecause.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.purgeairfromtheconden

serD.cleanthewatersideofthecondenserl830Onsmall,lowpressure,aircompressors,thecylindersareusuallylubricatedbythe____183

0．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.internalcoolingpassa

gesinthecrankshaftsandconnectingrods1831Tocorrecttheconditionofsluggingandfloodingbackinarefrigerationsystem,itmaybenecessaryto____1

831。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.adjusttheexpansi

onvalve1829A1830A1831D1832Powerisdefinedasthe____1832．功率可定义为“作功的速率”。A.rateofdoingworkB.amountofforceneededt

oovercomefrictionC.amountofworkaccomplishedD.distancethroughwhichanobjectismoved1833Whichofthelisteddeviceswouldbeinst

alledatacontrolsystemair1834pressurereducingstation?1833．空气控制系统的减压装置中安装了分水器。A.MoistureseparatorB.VacuumbreakerC.LubricatorD.Non-returnva

lve1834Airlinelubricatorsareusedincompressedairsystemstolubricate____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.th

esuctionanddischargevalvesB.toolsandequipmentservedbycompressedairC.airlinereducingvalvesD.alloftheabove1832A1833A1834B1835Whe

navesselisindry-dock,thevessel'sengineersshould____1835．当船舶在坞修时，轮机员应检查螺旋桨的状况。A.examinetheconditionofthepropellerB.chipandpaintallhullprotecti

onzincsC.installnewdockingplugsinallcofferdamsD.inspectthehullforhoggingorsagging1836Ifyouchangefromalowpo

urpointlubricanttoahighpourpointlubricantinarefrigerationsystem,____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.compr

essorlubricationwillbeimprovedB.oilwillnotleavethecrankcaseC.compressorvalveswillbedamagedD.oilmayconge

alintheevaporator1837Mechanicalenergyintransitionisreferredtoas____1837．机械能是以功的形式转变的。A.horsepowerB.workC.heatD.velocity1835A1836D1837B1838

Badlyleakingrefrigerationcompressordischargevalveswillcause____1838．制冷压缩机排出阀严重漏气，将引起压缩机持续运转。A.overfeedingoftheexpansi

onvalveB.damagetothecondenserC.constantrunningofthecompressorD.floodingofthereceiver1839Inarefrigerationsystemequippedwithareciprocat

ingcompressorandawatercooledcondensingunit,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.re

frigerantfloodingofthecompressorB.lowsuctionpressureC.noisycompressoroperationD.lowheadpressure1840Thedeliveryrateofanaxial-pistonhy

draulicpumpiscontrolledbyvaryingthepositionofthe____1840．轴向液压泵的排量是通过改变倾斜盘的位置来控制。A.slidingblockB.pintleC.reactionringD

.tiltingboxorswashplate1838C1839D1840D1841Whichofthefollowingtermscouldbeappliedtothesimpledefinition1842"theenergyofmotion”?1841．“动能”可简单地定义

为“运动的能量”。A.ElectricalenergyB.ThermalenergyC.PotentialenergyD.Kineticenergy1842ffthedischargevalvesonarefrigerationcompres

sorareleakingbadly,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.havehighdischargepressure

D.shortcycleonthehighpressureswitch1843Increasingthespeedofacentrifugalpumpwillresultinanincreaseinitscapac

ity.Anothermeansofincreasingthecapacityofacentrifugalpumpistoincreasethe____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,withallotherfactorsremainingthesameB.diameterofthesuctionpiping,withallotherfactorsremainingthesa

meC.widthoftheimpelleronlyD.diameteroftheimpeller1841D1842A1843D1844Excessiveairleakageintothesuction

sideofacentrifugalpumpwouldbe1845indicatedbywhichofthefollowingoperationalproblems?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.Thepumpdeliversfullcapacity

whenstarted,butgraduallyslackensofftoanabnormallylowflow.B.Thepumppackingglandoverheatsaftershortoperatingperiods.C.Themotorover-curren

tprotectivedevicecontinuallyshutsthepumpdown.D.Poundingnoisescanbeheardatthepumpsuctionchest.1845Whileinspecti

ngthesteeringsystematsea,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.airbubblesinthesightglassB.anyleaksinth

esystemC.over-travelintherudderangleindicatorD.lostmotionintherams1846Whichofthefollowingformsofenergyisdemonstrated

throughtheprocessofcombustion?1846．燃烧过程中释放化学能。A.ChemicalenergyB.MechanicalenergyC.ThermalenergyD.Electri

calenergy1844A1845B1846A1847Thecapacityofacentrifugalpumpcanbeincreasedbytheinstallationof1848.alargerdiameterimpeller.Anothermean

sofincreasingthepumpcapacityisto____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.reduc

ewearingringclearancesD.changethepumptoa"closecoupled"arrangement1848Aspurgearpumpshouldbeoperatedwiththedischargevalv

es____1848．齿轮泵启动时应将排出阀全部打开。A.slightlyopenedB.throttledC.fullyopenedD.halfwayopened1849Theoilinacargowinchgearboxshouldbesampledperiodicallyto____18

49．起货机齿轮箱油应定期取样，确保不被污染A.preventthegearboxfromleakingB.preventtheoilfrombecominginflammableC.makesurei

thasnotbecomecontaminatedD.makesurethemotorbearingsarelubricated1847A1848C1849C1850Whenthesteeringgearisinoperation,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.cheekforexcessiveoilleakagefromramsD.drainwaterfromtelem

otorcylinderseachwatch1851Anexcessivechargeofrefrigerantinanair-cooledrefrigerationsystemcancause____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.higherthannormalsuctionanddischargepressureswithahigherboxtemperatureC.higherthannormaldischargepressurew

ithanormalboxtemperatureD.thecompressortoruncontinuously1852Theoutputvolumeofapositivefixed-displacementpumpcanbechangedonlyby____1852。容积式

泵的排量只能通过改变泵的转速来改变。A.changingtheangleofthetiltingplateB.changingthespeedofthepumpC.movingtheslideblockandrotorD.movingtheShafttr

unnionblock1850C1851C1852B1853Ifyouaregiventhejobofaddinghydraulicfluidtoamooringwinch,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.addfluidthatisthesamecolorasthefluidinthereservoirB.addturbineoilbecauseitisalwaysagoodsub

stituteC.addanyoilthathasthesameviscosityasthehydraulicfluidD.checkthewinchmanufacturer'sinstructionbook1854Agradualdecrease

inthedischargepressureofanoperatinghydraulicpumpcanbecausedby____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.theb

leedervalvestickingintheopenpositionC.coldhydraulicfluidD.acloggedairventfilterontheoilreservoir1853D1854D1855Therateofheattransferf

romahotregiontoacoldregionisaffectedmostbythe____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.temperaturedifferencebe

tweentheregionsC.sizeoftheheatsourceD.totalheatofthesystem1856Whoisresponsibleforensuringthatsomeoneis

assignedtoclosethewatertightdoorsinanemergency?1.1856．在应急情况下，船长负责指派人员关闭水密门。2.A.MaritimeSafetyAdministration.B.M

asterofthevessel.C.ChiefEngineer.D.ChiefMate.1857Whichofthefollowingstatementsiscorrectconcerningheattransfer?1.1

857．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.Heattransferrateisaffectedmostbythesiz

eoftheheatsinkinvolved.C.Heattransferrateisaffectedmostbythetemperaturedifferencebetweentheheatsourceandtheheatsink.D.Heattransferbyra

diationwilloccuronlybymassmotionofafluidsubstance.1855B1856B1857C1858Whenarefrigerationcompressorhasdevelopedahighheadpressureasaresultof

1859arefrigerantovercharge,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.increasetheamountof

coolingwatertothecondenserB.decreasetheamountofcoolingwatertothecondenserC.addmorerefrigeranttothesystemD.removesom

erefrigerantfromthesystem1859Ontankvesselsequippedwithpoweroperatedcargotankvalves,thetypeofpoweroperatormostcommonlyus

edis____1859，油轮上，货油舱的阀门通常是液压驱动的。A.hydraulicB.electricC.steamD.diesel1860Iftheviscosityoftheliquidbeingtransferredremainsconst

antasthedischargepressureincreases,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.capacitywilldecrease

C.suctionpressurewillincreaseD.suctionpressurewilldecrease1858D1859A1860B1861Ifthesuctionpressureattherefrigerat

ioncompressorisbelownormal,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.overfeedingbyt

heexpansionvalveC.arestrictedsuctionstrainerD.duetoshortcyclingofthecompressor1862Asalinityindicatorisusedtodeterminethe____1862．盐度指示仪用来

判断被海水污染的区域。A,causeofsaltcontaminationB.locationofsaltwatercontaminationC.chemicalmakeupoffeed-waterD.lev

elofalkalinityincondensate1863Ifthereliefvalveonthedischargesideofahydmtdicpumplifts,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.acloggedpumpsuctionstrainerC.ablockageinthelinebetweenthepumpandhydraulicmotorD

.thehydraulicmotorturningtoofast1861C1862B1863C1864Therateofheattransferbetweenthehotandcoldfluidspassing

through1865ashell-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.begreatestinas

inglepasscounterflowheatexchangerC.remainconstantthroughouttheheatexchangerD.varyfromsectiontosectionthroughouttheheatexchanger1865Thetemperature

differentialoccurringbetweentheinlettemperatureofthefluidtobecooledandtheoutlettemperatureofthecoolingmediuminashell-and-tubeheat

exchangerisgreatestinwhichoftheflowdesignslisted?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.CrossB.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.maintainsteadypressureinasystemC.heat,orcoolonefluidb

ymeansofanotherfluidD.reducetheengineroomtemperatureintropicalclimates1864D1865C1866C1867Whichofthefollowingproblemscouldca~thehighpre

ssurecutoutswitchtoshut1868downthecompressorinarefrigerationsystem?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.Ashortag

eofliquidrefrigerantB.ExcessivefrostontheevaporatorC.ExcessivecondensercoolingwaterD.Insufficientcondensercoolingwaterflow1868Aninc

reasingheadpressureinarefrigerationsystem,withoutanycorrespondingchangeinthecoolingwaterinlettemperature,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-condensablegasesinthecondenserC.waterintherefrigerantD.flo

odingbackofliquidrefrigerantfromtheevaporator1869fftherefrigerationcompressorwasdevelopinghigherthannor

maldischargepressure,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-condensablega

sesinthesystemB.leakingdischargevalvesC.leakingsuctionvalvesD.liquidrefrigerantfloodingbackfromthecoolingcoil1867D1868B1869A1870fftheheadpress

ureofareciprocatingrefrigerationcompressorisexcessive,____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.thereliefvalveshouldopenbeforethehighpress

urecutoutB.thereliefvalveshouldopenandallowtheexcessrefrigeranttoflowtothereceiverC.thehighpressurecutoutswitchs

houldoperatebeforethereliefvalveopensD.youshouldcloseinonthesuctionvalve1871Pittinginthesuctionareasofa

centrifugalpumpbronzeimpellerisusuallycausedby____1871．离心泵叶轮吸口处起麻点，通常是由于气蚀引起的。A.cavitationB.electrolysi

sC.abrasionD.corrosion1872Thecontrolmodeinwhichthefinalcontrolelementismovedfromoneoftwo1873fixedpositionstotheotherisknownas____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.neutralzoneactionC.rangeD.on-offaction1873Onecauseofhighheadpressureoccurrin

ginarefrigerationsystemcanbe____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.insufficientcoolingwaterflowtothecondenserB.alowrefrigerantchargeinthesystem

C.theliquidvalveisopentoomuchD.highevaporatorsuperheat1870C1871A1872D1873A1874Theusualsymptomsofcavitationinacentrifugalpumpis____1874

．离心泵气蚀的常见征兆是噪声和振动。A.noiseandvibrationB.anincreaseindischargepressureC.anincreaseinsuctionpressureD.liftingofthereliefvalve1875Whichof

theproblemslistedwouldcausethedischargetemperatureofanR-121876refrigerationcompressortoincrease?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.Suctiongasheatexchangerbypassed.C.Condensercloggedorfouled.D.Highpressurecutout

switchinoperative.1876Lowcompressorheadpressureinarefrigerationsystemcanbecausedby____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.insufficientcondensercoo

lingwaterB.excessivecondensercoolingwaterC.airintherefrigerationsystemD.excessiverefrigerantinthesystem1874A1875C1876B1877Apre

ssuredropthroughtherefrigerantliquidlinemaycause____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.forma

tionofflashgasintheliquidlineD.expansionvalvetofreezeopen1878Heavywearinaparticularareaoftheinnercircumferenceofapackingring1879maybecausedby___

_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.aloosestuffin

gboxgland1879WhichofthelistedpumpsisNOTapositivedisplacementpump?1879．离心泵不属于容积式泵：A.CentrifugalB.ReciprocatingC.GearD.Rotary1880Ifthet

hermalbulbofanexpansionvalveisincorrectlyplacedatthecenterofthecoilinsteadoftheend,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.delivermorerefrig

eranttothecoilD.decreasethecapacityofthecoil1877C1878C1879A1880D1881Themajorsourceofchemicalcontaminantsinhydraulicfluidis____1881．液压油

的化学污染源主要是氧化产物。A.microscopicsteelshavingsB.abrasivewasteC.anti-oxidantcompoundsD.oxidationby-products1882Theamountoffluidfrictiono

rinternalfrictioninherentinaminerallubricatingoilis1883reflectedasameasureofits____1882．润滑油中的内阻力大小是用帖度来表示的。A.specific

gravityB.viscosityC.S.E.numberD.hydrolyticstability1883Thermostaticexpansionvalvescanbeadjustedfor____1883．热力膨胀阀仅

用来调节过热度。A.suctionpressureonlyB.headpressureonlyC.superheatonlyD.suctionpressureandboxtemperature1884Agreasegunisgenerallyusedtolubricatea____1

884．牛油枪可用来润滑凝水泵(淡水泵)的球轴承。A.condensatepumpballbearingB.mainshaftbearingC.mainturbinebearingD.dieselenginewristpinbearing1885Aninternalbypassispr

ovidedonsomehydraulicsystemsuctionstrainerstohelpreducethepossibilityof____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.contaminationo

ftheoilC.pumpcavitationD.spongyactuatormovements1881D1882B1883C1884A1885C