轮机英语试题.docx

轮机英语试题.docx

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轮机英语试题

中华人民共和国海事局

2007年第6期海船船员适任统考试题（总第44期）

科目：

轮机英语试卷代号：

801

适用对象：

无限/近洋航区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100分钟）

答题说明：

请选择一个最合适的答案，并将该答案案答题卡要求，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.Modernmarinedieselenginesequippedwithmechanicalfuelinjectionoperateonacombustionphasewithinthecyclewhichis.

A.entirelyconstantpressure

B.entirelyconstanttemperature

C.acombinationofconstantvolumeandconstantpressure

D.acombinationofconstanttemperatureandconstantpressure

2.Theaveragepressureexertedonapistonduringeachpowerstrokeistermed

A.indicatedhorsepowerB.meaneffectivepressure

C.exhaustbackpressureD.compressionpressure

3.Anindividualinjectionpumpisdesignedforvariablebeginningandconstantendingofinjection.Fordieselenginesoperatingatconstantspeeds,thestartofinjectionwill

A.advanceastheloadincreasesB.retardastheloadincreases

C.remainunchangedregardlessofloadD.alwaysoccurattopdeadcenter

4.Onoppositeendsofasingleshaftofaturbo-blowerareagasdrivenandaaircompressor,whicharesealedeachother.

A.chargeairreceiverB.scavengingairbeltC.turbineD.aircooler

5.Theadverseeffectsofburninghighsulfurfuelcanbecompensatedforbyusingcylinderoilhavingsufficient____.

A.dispersantadditivesB.flocpointC.alkalinityadditivesD.ignitionquality

6.Tocheckthesettingoftheover-speedtriponadiesel-poweredgenerator,youwouldusea.

A.torsionmeterB.tachometerC.dynamometerD.ponybrake

7.Thebesttooltouseforremovingthecarbonridgeatthetopofanenginecylinder,priortoremovingthepiston,istouse.

A.anelectricgrinderB.ametalscraperC.areamerD.athree-winghome

8.Faultyoperationofdieselenginefuelinjectionnozzlescanbeadirectcauseof.

A.excessivefuelnozzleholdercoolingB.sedimentinthefuelsupply

C.distortionofthefuelspraypatternD.improperatomizationofthefuel

9.Earlyfuelinjectiontimingisindicatedbythecylinderpressurebeing.

A.abovenormalwithabelownormalexhausttemperature

B.abovenormalwithanormalexhausttemperature

C.belownormalwithanormalexhausttemperature

D.belownormalwithanabovenormalexhausttemperature

10.Whichofthefollowingadjustmentsisalwaysrequiredwheneverthedieselenginegovernoroilhasbeendrainedandrenewed'?

A.SpeeddroopB.CompensationC.IdlespeedsettingD.Loadlimitcontrol

11.Excessivelubricatingoilconsumptioninarunningdieselenginecanbecausedby__.

A.cloggedlubeoilpipingB.excessivevalve-guideclearance

C.highlubeoilviscosityD.lowlubeoiltemperature

12.Onceatrunkingfireisdetectedtheengineshouldbesloweddown,Onnoaccount__.

A.thetrunkingshouldbeopenedupB.shouldthetrunkingbeopenedup

C.thetrunkingshouldnotbeopenedupD.shouldthetrunkingnotbeopened

13.___onashiptransmitspowerfromtheenginetothepropeller.

A.TheautomaticcontrolsystemB.Thespeedregularlysystem

C.ThetransmissionsystemD.Thecompressionairsystem

14.Dieselenginestartingdifficultiesduetocoldintakeairtemperaturescanbeovercomebyusinga/an.

A.increaseinstartingairpressureB.increaseinlubeoilviscosity

C.compressionexpansiondeviceD.jacketwaterheater

15.Pittedreductiongearteethhavingadeepbluecolorwithevidenceofoverheatinghavebeenoperatedwith.

A.excessivespeedB.improperwarm-up

C.fuelpumpfailureD.inadequatelubrication

16.Impropermaintenanceofthefueloilburnersinanautomaticallyfiredauxiliaryboiler,couldresultin.

A.increasedfuelconsumptionB.increasedfeed-waterconsumption

C.fuelpumpfailureD.combustioncontrolsystemfailure

17.Blacksmokecomingfromaboilercanbeusuallycausedby.

A.lowwaterlevelB.lowoilpressure

C.excessivelyhighfuelpressureD.animproperair/fuelratio

18.Somepumpsusepackingassealinggland.Theglandshouldbe.

A.slackenoughtoallowslightleakageoffluidB.slightlyblocked

C.broughtuptightsoasnottoallowanyleakageD.fittedwithareliefvalve

19.Itispossibletomountadoublesuctioncentrifugalpumpimpellerwiththevanesfacinginthewrongdirection.Thiswouldcausethepump.

A.headcapacitytoimproveB.dischargetobereversed

C.efficiencytodecreaseD.slippagetodecrease

20.Theheatgainedperpoundofrefrigerantintheevaporatorisknownasthe.

A.latentheatofvaporizationB.sensibleheat

C.refrigeratingeffectD.specificheatofvaporization

21.Whichofthefollowingbestdescribes"overchargeofrefrigerant"?

A.toomuchrefrigerantB.toolittlerefrigerant

C.refrigerantisranoutD.runningisover

22.Crankcasesweatinginarefrigerationsystemiscausedby__

A.astucksolenoidvalveB.ashortageofrefrigerant

C.toomuchoilincirculationD.toomuchsuperheat

23.Whichoftheprocesseslistedwouldbethemostsatisfactorymethodtousetolowerthehumidityoftheairbeingcirculatedbyanairconditioningsystem?

A.Coolingtheairtoatemperaturejustabovedewpoint.

B.Heatingtheairtoapointatwhichmoisturewillboiloff,thenre-coolingit.

C.Coolingtheairtoapointbelowdewpoint,thenreheatingit.

D.Heatingtheairandthencoolingittoapointbelowdewpoint

24.Placingafilteronthebywaterseparatorwill"polish"thedischargebutoverloadingmustbeavoided.

A.suctionsideB.dischargesideC.by-passpipeD.samplingpipe

25.Whichisthepollutionpreventionequipment?

A.boosterpumpB.evaporatorC.incineratorD.cooler

26.Insewagetreatment,theterm'maceration'referstotheprocessof.

A.breakingupsolidmatterintofineparticles

B.precipitatingnon-decomposedwasteinacollection

C.chemicallyadjustingthesewagepHto7.0

D.eliminatingbacteriumcolifromthesewage

27.Thesizeofthedischargeringusedfortheefficientoperationofadisktypepurifierisdependentuponthe.

A.ratedcapacityofthatpurifierB.viscosityoftheoilbeingpurified

C.maximumdesignspeedofthatpurifierD.specificgravityoftheoilbeingpurified

28.Intheproductionoffreshwaterfromseawaterthroughaprocessofheatingandcooling,thecoolingphaseofproductionisusuallycalled.

A.evaporationB.distillationC.dehydrationD.condensation

29.playaveryimportantpartinhydraulicpartsofthehydrauliccircuitsystemsbypreventinginteractionbetweendifferentpartofthehydrauliccircuit.

A.MotorB.CheckvalvesC.SafetyvalvesD.Reducingvalves

30.Amooringwinchshouldbeequippedwithmechanicalbrakescapableofholding.

A.halfthebreakingstrengthofthemooringline

B.thefullbreakingstrengthofthemooringline

C.themaximumexpectedtensionofthemooringline

D.50%overtheworkingtensionoftilemooringline

31.Whileinspectingthesteeringsystematsea,youshouldcheckfor___

A.airbubblesinthesightglassB.anyleaksinthesystem

C.over-travelintherudderangleindicatorD.lostmotionintherams

32.Hydraulicmachineryfailuresarecommonlycausedbycontaminationofthehydraulicfluidand.

A.fluidfrictionB.fluidturbulenceC.componentmisalignmentD.pressuresurges

33.ACandDCgeneratorsaresimilarinthatthey

A.bothgeneratealternatingvoltages

B.bothrectifythevoltagebeforedelivery

C.areconstructedatthesamephysicalsize

D.bothsupplythree-phasepower

34.PriortoclosingthebreakerwhenparallelingtwoACgenerators,therecommendedpracticeistohavetilefrequencyoftileincomingmachine.

A.slightlylessthanthelinefrequencyB.thesameasthelinefrequency

C.slightlygreaterthanthelinefrequencyD.havenothingtodowiththeline

35.Toequalizethepowerfactoroftwoalternatorsoperatinginparallel,the.

A.fieldexcitationofbothunitsisadjustedB.governorsofbothunitsareadjusted

C.phasesequenceisalteredD.kilowattloadisevenlydivided

36.Afterthetroubleoftheautomaticcontrolsystemhasbeencompletelyeliminated,assistance

____required.

A.remainedB.stillC.nolongerD.muchmore

37.Switchboardsmaybeofthedead-fronttypeinwhichalllivepartsareinstalledbehind

onlytheoperationhandlesandinstrumentsareonthefront

A.thecapstanB.thecollectorC.thepanelsD.thesurface

38.Aboardship,agroundedfieldcoilinanACmotorcanbedeterminedbyusinga__.

A.portablegrowlerB.Galvanometer（检流计）

C.visualinspectionD.megohmmeter

39.Linelossesinadistributioncircuitarekepttoaminimumby_____

A.addingrubberinsulationconductorstothecircuit

B.usinghighercurrentandlowervoltage

C.increasingthenumberofthermalrelays

D.usinghighervoltageandlowercurrent

40.Anelectricaldevicewhichpreventsanactionfromoccurringuntilallotherrequiredconditionsaremetiscalleda/an.

A.limitB.monitorC.modulatorD.interlock

41.Thesteadystatedifferencebetweenthecontrolpointandthevalueofthecontrolledvariable.correspondingwiththesetpoint,isknownas.

A.deadbandB.controlpointC.deviationD.offset

42.Theisa,crystalwhich,underpressure,producesanelectriccurrentwhichvarieswiththepressure

A.alternatorB.glassthermometerC.bourdontubeD.piezoelectricpressuretransducer

43.Restrictionsoccurringinthesmallorificesofpneumaticcontrolsystemcomponentscanbecausedby.

A.moistureinthecompressedairsupply

B.excessivedrynessinthecompressedairsupply

C.pressuresurgingtnthecompressedairreceiver

D.insufficientlubricationofthesystemcomponents

44.Dieselenginecontrolcanbeobtainedbythe