轮机员考试真题一及答案.docx

轮机员考试真题一及答案.docx

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轮机员考试真题一及答案

中华人民共和国海事局

2003年第1期海船船员适任证书全国统考试题（总第30期）

科目：

轮机英语试卷代号：

601

适用对象：

沿海航区3000KW及以上船舶轮机长

（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）

答题说明：

请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。

第1题至68题，每题1分，第69题至76题，每题1.5分,第77题至78题,每题10分。

一、单项选择题：

1.Anycarbonbuiltuponsurfacesmustbewashedawayby_____additivesandheldinsuspensionbya_____additive.

A.dispersant/detergentB.detergent/dispersant

C.dispersant/dispersantD.detergent/detergent

2._____poweristhepowerdevelopedwithinthecylinderandcanbemeasuredbyanengineindicator.

A.TheshaftB.ThemechanicalC.TheelectricD.Theindicated

3.Whichofthefollowingcanbeobtainedbymeansofanindicatorcard?

A.thepeakpressureinacylinder.B.thetemperatureofthecoolingwater.

C.thefuelconsumption.D.Noneoftheabove.

4.Acidsolution______inthesystemcanbetestedfromtimetotimebyputtingsomeontoapieceoflime.

A.strengthB.denseC.percentageD.velocity

5.Thedeviceallowingforthechangeinvolumeofthecoolingwaterinapropulsiondieselengineclosedcoolingsystemisthe_____.

A.freshwaterexpansiontankB.seawaterexpansiontank

C.thermostaticexpansionvalveD.jacketwatercooleraccumulator

6.Whichofthefollowingstatementsiscorrectconcerningtheviscosityoflubricatingoil?

A.Viscositywillincreaseastemperatureincreases.

B.Viscosityisameasureofafluid'sinternalresistancetoflow.

C.Viscositywilldecreaseastemperaturedecreases.

D.Viscosityisnotdependentontemperature.

7.Accordingtothewaytheenergyoftheexhaustgasesisutilized,pressure-chargingcanbedividedintotwomainsystems,namely,theconstant-pressuresystemand_____.

A.thepulse-phasesystemB.thepulseDopplersystem

C.thepulsesystemD.thepulseinterval

8.Theworkfueldoesineachworkingcyclecanbeobtainedbytakingthe_____.

A.precautionsB.rpmC.indicatorcardsD.BandC

9._____inwhatpositiontheenginestopstherewillalwaysbeatleastoneofthecylinderswithitsstartingairvalveopentoadmitcompressedairtostarttheengine.

A.BecauseB.OwingtoC.ForD.Nomatter

10.Thepositionofthepistonpartsinrelationtoeachotherissecuredbymeansof_____inthecrown.

A.amarkB.aboltC.adowelpinD.ameasuringtool

11.Bywhichofthefollowingmeansisforceefficientlyprovidedtovarythepitchofthebladesonamoderncontrollablepitchpropeller?

A.HydraulicB.MechanicalC.PneumaticD.Electrical

12.Therequiredamountinthechangeofspeednecessarybeforeagovernorwillmakeacorrectivemovementisknownas_____.

A.speeddroopB.sensitivityC.stabilityD.promptness

13.Amono-pumpisasingle-screwpump.Thatmeansitconsistsof_____rotor（s）.

A.oneB.twoC.threeD.four

14.Thedischargeheadofacentrifugalpumpwillvarydirectlywiththe_____.

A.changeinimpellerdiameter

B.squareoftheimpellerdiameter

C.cubeoftheimpellerdiameter

D.impellerefficiencyforlargechangesinthesizeoftheimpeller

15.Gearpumpsareofpositivedisplacementtypepumpsbecausetheydischargeanearconstantamountofliquid_____pressure.

A.dependingonB.inrelativetoC.regardlessofD.becauseof

16.Astheairpassesthroughthechargeaircooler,itstemperaturemaybereducedandmoisturecondensed,withthecondensateindangerofbeingcarriedintotheengine.Soawaterseparatorshouldbemountedbeneaththebottompartoftheengineinletmanifold.Awaterseparatorisusedinorderto_____.

A.keeptheairfrombeingcarriedintotheengine

B.keepthemoisturefrombeingcondensed

C.keepthedangerfrombeingcarriedintotheengine

D.takeawaythecondensatefromtheair

17.Theamountoffluiddeliveredbyascrewpumpcanberegulatedby_____.

A.throttlingthepressurelineB.changingthespeedoftherotor

C.eitherAorBD.Noneoftheaboveistrue.

18.Strainers,sometimescalled_____,aredevicesdesignedtopreventthepassageofunwantedsolidsintoorfurtheralongasystem.

A.dampersB.filtersC.stoppercircuitsD.separators

19.Impropermaintenanceofanautomaticauxiliaryboileroilburnercouldresultin_______.

A.fuelpumpfailureB.fanmotorfailure

C.increasedfeedwaterconsumptionD.decreasedboilerefficiency

20.Asforaoil-firedboilertoomuchairwouldindicatedby_____.

A.yellowishflameB.goldenyellowflame

C.milkyflameD.brilliantwhiteflame

21.Priortolightingoffacoldautomaticallyfiredauxiliaryboiler,youshould_____.

A.checkandregulatethewaterlevelB.closetheaircockoncefiresarelit

C.blowdownthegageglassD.crackthesteamstoptoassureprotectivesteamflow

22.Tostarttheejectionprocesstheoilfeedtothecentrifugeisfirstshutoffandtheoilremaininginthebowlremovedbyadmitting_____.

A.flashingwaterB.operatingoilC.flushingwaterD.sealingwater

23.Theyunderstandthe_____ofautomaticsludgedischargingofthepurifier.Buttheyarenotgoodinpractice.

A.principleB.principalC.theoryD.case

24.Theprincipleofseparationbywhichallcommerciallyavailableoilywaterseparatorsfunctionis_____differentialbetweenoilandwater.

A.thetemperatureB.theviscosityC.thegravityD.thesize

25.Theoilsludgeisburntinthe_____onboard.I’llshowyoutheashes.

A.boilerB.mainengineC.auxiliaryengineD.incinerator

26.Aclass‘C’firewouldoccurin_____.

A.beddingB.pipeinsulationC.paintD.agenerator

27.Ifyouaregiventhejobofaddinghydraulicfluidtoamooringwinch,andarenotcertainastothetypeoffluidtouse,youshould_____.

A.addfluidthatisthesamecolorasthefluidinthereservoir

B.addturbineoilbecauseitisalwaysagoodsubstitute

C.addanyoilthathasthesameviscosityasthehydraulicfluid

D.checkthewinchmanufacturer'sinstructionbook

28.Nospecificperiodisgivenfortherenewalofthelubricatingoilfilterelementasthisshouldbedone_____afigureof0.7barsisshownonthegauge.

A.whateverB.wheneverC.whereverD.whoever

29.Withreferencetooperatingafour-ramsteeringgearsystemunderemergencyconditions,whichoneofthefollowingstatementsisincorrect?

A.Onlyonepumpshouldbeusedatanytime

B.Theshipspeedshouldbereducedto70%ofthenormal

C.Watchkeepingofthesteeringgearshouldbeincreased

D.Limitationsofthesteeringgearshouldbeloggedbutthebridgeneednotbeinformed

30.Whenthewaterproducedfrommostevaporatorissuppliedfordrinkingpurpose,itmustbetreatedtoensureitisbiologicallypureand_____.

A.slightlyacidicB.slightlyalkalineC.nosaltyD.slightlybitter

31.Excessivelubeoilconsumptionbyareciprocatingaircompressorcanbecausedby_____.

A.usingaslightlydirtyairfilter

B.usingoilhavinganexcessiveviscosity

C.intercoolerorafter-coolerleaks

D.carryingtheoillevelhigherthannormal

32.Theprimarytaskofthecompressedairsystemistodeliverthestartingairnecessaryfor_____.

A.startingtheM.E.B.startingtheemergencyelectricalternator

C.drivingthemainturbineD.drivingtheturbocharger

33.Sludgemayforminthecrankcaseofanairconditioningcompressorasaresultof_____.

A.bubblingrefrigerantB.overheatingandoxidation

C.loweredoperatingtemperaturesD.reducingthecloudorflashpoint

34.Whichofthelistedstatementsiscorrectconcerningrefrigerationsystems?

A.Dehydratorsmustbeusedcontinuouslyinarefrigerationsystem.

B.A25tonrefrigerationsystemhasthesamecoolingeffectasmelting25tonsoficein24hours.

C.Athermostaticexpansionvalveisusedtocontrolrefrigeratedspacetemperature.

D.Theliquidreceiverfunctionstocollectandremovenon-condensablegases.

35.Whichofthestatementslistedconcerningheattransferiscorrect?

A.Heatisalwaystransferredataconstantrate.

B.Heattransferrateincreasesastemperaturedifferenceincreases.

C.Therateofheattransferisnotaffectedbytemperaturedifference.

D.Thehightemperatureregionisknownasaheatsink.

36.Anexcessivechargeofrefrigerantinanair-cooledrefrigerationsystemcancause_____.

A.oilfoaminginthecompressor

B.higherthannormalsuctionanddischargepressureswithahigherboxtemperature

C.higherthannormaldischargepressurewithanormalboxtemperature

D.thecompressortoruncontinuously

37.Whenaddingoiltoarefrigerationsystem,precautionsmustbetakentoensurethat_____.

A.thecompressorsuctionpressureisnottoohigh

B.allairispurgedfromthepumpandchargingfittings

C.thehighpressurecutoutswitchisheldopentopreventaccidentalstarting

D.thecondenseriscompletelyshutdownfirst

38.Thestaringcurrentofana.c.motoris_____theratedcurrent.

A.thesameasB.muchlargerthanC.lessthanD.equals

39._____isusedtoproduceelectricpower.

A.AnalternatorB.AfreshwatergeneratorC.AcompressorD.Aclarifier

40.Generatorsshouldhaveanexcitation/voltageregulationsystemwhichwillenablethemtosharethesteadystatereactiveload_____nomachineexceedsitsproportionalshareofreactiveloadbymorethan10%oftheratedreactiveloadofthelargestgenerator.

A.whenB.soasC.suchthatD.though

41.WhichofthefollowingshouldbetheFIRSTstepinremovingageneratorfromparalleloperation?

A.Tripthegeneratorofftheswitchboard.

B.Turnoffallelectricalequipment.

C.Removetheloadfromthe'offgoing'generator.

D.Increasethecycle