轮机英语试题二十二

轮机英语试题二十二轮机英语试题二十二PAGEPAGE15轮机英语试题二十二PAGE试题二十二

一、单项选择题：

Whichoneisconnectedtothepiston?

A.cylinderB.connectingrodC.thrustshaftD.crankshaft

Thetrouble-freelifeofanengineindicates______.

theperiodoftimeduringwhichnotroubleoccurstotheengine

notroublewilloccurtotheengineallitslife

troublemayoccurfreelytotheengine

nomatterwhatyoudototheengine,notroublewilloccurduringthisperiod

Additives______protectivelayersonmetalsurfacesguardingthemagainstcorrosion.

A.damageB.formC.dissolveD.contaminate

Machinerydrivingfueloiltransferandfueloilservicepumpsmustbefittedwitharemote

meansofstoppingthemachineryfrom______.

A.withinthespaceconcernedB.outsidethespaceconcernedC.thethrottlestationD.withinthefireroom

Insomedesignsthecylinderoilistimedsothattheoilinjectsonlyonthe______.

A.pistoncrownB.pistongrooveC.pistonskirtD.pistonringbelt

Whichoftheprocesseslistedconsumesthegreatestamountofpowerwhileproducingthegreatestamountofheat?

A.OvercomingslidingfrictionB.Overcomingrollingfriction

C.OvercomingfluidfrictionD.Overcomingoilwedgefriction

______providethewatertothepistons.

A.PneumaticpipesB.HydraulicpipesC.TelescopicpipesD.Operatinggas

pipes

Accordingtothewaytheenergyoftheexhaustgasesisutilized,pressure-chargingcanbe

dividedintotwomainsystems,namely,theconstant-pressuresystemand______.

A.thepulse-phasesystemB.thepulseDopplersystemC.thepulsesystemD.thepulseinterval

Vee-typeengineshavetheconnectingrodsfromtwocylindersconnectedtoeach______ofthecrankshaft.

A.throwB.webC.mainbearingD.deflection10.______thebodiesare,______thefrictionwillbe.A.Thesmoother/thegreaterB.Smoother/lessC.Therougher/thegreaterD.Rougher/greater11.Theenginespeedatwhichresonancecanoccuristermed______.A.maximumspeedB.fullspeedC.seaspeedD.criticalspeed12.Acrankshaftwhosecenterofgravitycoincideswithitscenterlineissaidtobe______.A.dynamicallybalancedB.staticallybalancedC.counterbalancedD.resonantlybalanced13.______therepairinsoshortatimeisunknowntous.A.HowtheyfinishedB.HowdidtheyfinishedC.ThathowtheyfinishedD.Thathowdidtheyfinished

14.Theprincipleofhydrostaticlubricationhasbeenappliedtothecross-headusing______.

A.highpressurelubricatorsB.tierodsC.fuelinjectorsD.fuelvalves

Loadcontrolonadieselengineisaccomplishedby______.

regulatingthespeedoftheturbocharger

rotatingthefuelinjectorpumpplunger

regulatingthespeedofthefueloiltransferpump

changingenginetiming

Areductioninloadonadieselengineresultsin______ofspeedofthecrankshaft.

A.areductionB.anincreaseC.anoutingD.adownwards

Whichofthelistedstatementsiscorrectconcerningthestartingofcentrifugalpumps?

Theyshouldalwaysbestartedwiththedischargevalveclosed.

Theyshouldalwaysbestartedwiththedischargevalveopened.

Aprimingpumpisalwaysrequiredtofloodtheimpellersuction.

Theyshouldalwaysbestartedwiththesealinglinevalvesclosed.

The______dischargeanearlyconstantamountofliquidregardlessofpressure.

A.mixed-flowpumpB.axial-flowpumpC.centrifugalpumpD.displacement

pump

19.Inanauxiliaryboilersteamandwatersystem,thehighestpressurewillbeinthe______.

A.steamstopvalveB.drypipeC.feedwatersystemD.generatingtubes

Therateofheattransferinawater-tubeauxiliaryboilercanbeincreasedby______.

operatingtheboileratlessthannormalwaterlevel

installingfinsonthefiresidesofwater-tubes

increasingtheamountofexcessairtotheburners

treatingtheboilerwaterwithchemicaloxygenscavengers

High-speedrotationinacentrifugalpurifiercanproduceaforce______theforceofgravity.

A.manythousandtimeslargerthanB.thesameas

C.manythousandtimessmallerthanD.noneoftheabove

Wheninoperation,itisunavoidablethatasmallamountofoil______throughleakage,andinordertocompensatefortheseleaksthesystemisconnectedtoafeedpump.

A.escapesB.overheatsC.expandsD.accelerates23.GreasetherollerbearingswithH.P.gun.Inthesentence"H.P."means______.A.horsepowerB.highpressurecompressorC.handpumpD.highpressure24.Theoilsludgeisburntinthe_____onboard.I’llshowyoutheashes.A.boilerB.mainengineC.auxiliaryengineD.incinerator25.Theterm‘discharge’,asitappliestothepollutionregulations,means______.A.spillingB.leakingC.dumpingD.alloftheaboveWhennormaloperatingpressureisappliedtothehydraulicoilusedinahigh-pressuresystem,theoil______.

A.viscositywilldecreaseB.volumewillincrease

C.volumewilldecreaseD.pourpointwillbereduced

27.______areusedforhaulinginorlettingoutthewireswhichfastentheshiptotheshore.

A.CargowinchesB.MooringwinchesC.WindlassesD.Cargohatches

Whichofthefollowinghydraulicsystemsisnotoneofthethreesub-divisionofthehydraulicdrivesystem?

A.constantpressuresystemB.variablepressuresystemC.variabledisplacementsystemD.constantvolumesystem

Withreferencetorulesgoverningsteeringgear,whichoneofthefollowingrulesisincorrect?

Itisrequiredthatallshipsareprovidedwithtwoindependentsteeringgearsystemsthatisone

mainandoneauxiliary.

Theauxiliarygearcouldbepoweroperatedinpassengerships.

Theauxiliarygearmustbeofadequatestrengthandsufficienttosteerashipatnavigablespeed.

Allmovingpartsofthesteeringgearmustbeguardedagainstanypossibledamage.

Brokenvalvestripsinanoperatinglowpressure,aircompressorwillcause______.

A.animmediatecrankcaseexplosionB.oilcontaminationinthecompressedairC.adecreaseincompressorcapacityD.noimmediatelossofthecompressedaircapacity

Condensatemustbedrainedfromtheintercoolerandafter-coolersofanaircompressorbecause______.

thecoolingeffectofthecondensatereducesthecompressor'sefficiency

adangerofexplosionexistswheneverwaterispresentinacompressor

watercauseserraticoperationofpneumaticcomponents

thevolumetriccapacityofthefirststageisreducedifwaterremains

Iftheheadpressureofareciprocatingrefrigerationcompressorisexcessive,______.

thereliefvalveshouldopenbeforethehighpressurecutout

thereliefvalveshouldopenandallowtheexcessrefrigeranttoflowtothereceiver

thehighpressurecutoutswitchshouldoperatebeforethereliefvalveopens

youshouldclosethesuctionvalve

Sludgemayforminthecrankcaseofanairconditioningcompressorasaresultof______.

A.bubblingrefrigerantB.overheatingandoxidationC.loweredoperatingtemperaturesD.reducingthecloudorflashpoint34.Afeelerorthermalbulbisusedfortheexpansionvalveto______.A.detectthetemperatureB.detectthepressureC.heattherefrigerantD.acceleratetherefrigerant35.Thedewpointofairisreachedwhenthewetbulbtemperatureis______.A.twicethedrybulbtemperatureB.10℃abovethedrybulbtemperatureC.5℃abovethedrybulbtemperatureD.equaltothedrybulbtemperature36.______isusedtoproduceelectricpower.A.AnalternatorB.AfreshwatergeneratorC.AcompressorD.Aclarifier37.InordertochangethedirectionofrotationofaD.C.motor______.I.thefieldleadsmustbechanged;II.theinputleadsmustbechangedA.IonlyB.IIonlyC.eitherIorIID.neitherIorIIWhichofthefollowingshouldbetheFIRSTstepinremovingageneratorfromparalleloperation?

Tripthegeneratorofftheswitchboard.

Turnoffallelectricalequipment.

Removetheloadfromthe'offgoing'generator.

Increasethecyclesofthegeneratorstayingontheline.

Thereisadangerofthestartingcurrent______thatthewindingsareburntout.

A.toincreaseB.tobesoincreasedC.increasedD.beingsoincreased40.Theviscosityregulatorcontrolsthefueloiltemperature______provideoilatthecorrectviscosityforcombustion.A.inorderthatB.becauseofC.inordertoD.owingto41.Whenthereisafireinalargeelectricmotor,normallytheveryFIRSTstepisto______.A.securetheelectricsupplyB.ventilateareatoremovesmokeC.startthefirepumpandleadouthoseD.applyfoamEngineprotectionbymeansofanalarmorshutdowncontrolcanbeobtainedwithdevicesthataresensitiveto______.

A.temperatureB.pressureC.enginespeedD.alloftheabove

43.WithUMS,whentheengineroomisunwatched______willcontrolthemainengine.

A.thebridgeofficeronwatchB.thechiefengineer

C.thedutyengineerD.thedutymotorman

Thecorrecttighteningisobtainedbyuseof______tomeasuretheextensiongiventothebolts.

A.pressuregaugesB.stretchgaugesC.thermometersD.bridgegauges

45.Amainpropulsiondieselengineisnormallyshutdownby______.

A.shuttingofftheairsupplyB.over-speedingtheengine

C.securingthefuelsupplyD.securingtheignitionsystem

Onecylinderofadieselengineispersistentlyknockinganddoesnotceasewhenthefuelsupplytothatcylinderissecured.Whichofthefollowingproblemsmaybethecause?

A.Lowloadingofthecylinder.B.Excessivecoolingofthatpiston.

C.Sluggishringactiononthepiston.D.Amechanicaldefectinaworkingpart.

47.Poorcombustioninadieselenginecanbecausedby______________.

A.reducetheengineloadB.increasethecoolingwaterflow

C.increasethelubeoilpressureD.adjustthefuelrack

Iffuelinjectiontoafour-stroke/cycledieselenginebeginsearlierthandesigned,ignitionmaybedelayedbecausethe______.

cylindercompressionpressuremaynotbehighenough

cylindercompressiontemperaturemaybetoohigh

fueloilinjectionpressuremaynotbehighenough

scavengeandpurgeprocessisincomplete

Dieselengineautomatedcontrolsystemsmayutilizesensingdevicesofdualfunction,withsensingrangesprovidingbothalarmandengineshutdowncapability.Whichofthekeypointslistedwouldonlyrequireanalarmsensor?

A.Lubeoilpressureandtemperature.B.Jacketwaterpressureandtemperature.

C.Engineover-speed.D.Lubeoilsumplevel.

50.Fixthefuelinjectorinto______afterrepair.

A.thecylinderlinerB.thecylindercoverC.thecylinderjacketD.the

piston51.Lowersuctionpressureofapumpmaybecausedby______.A.toomuchairinthepipelineB.closedinletvalveC.emptytankD.leakypipe52.Dieselengineexhausttemperaturesmaybeusedtoindicate______.A.leakingexhaustvalvesB.anoverloadedcylinderC.acloggedinjectornozzleD.alloftheabove53.Shimsofdifferentthicknessesareinsertedbetweentheshellstoenableadjustmentof______.A.thebearingclearancesB.thebearingthicknessC.thebearingstrengthD.thebridgehardness54.Oilmistdetectorsareusuallyusedonboardtodetectoilmistdensitywithin______.A.theenginecrankcaseB.theenginescavengeboxesC.draintanksD.fueltanks55.Toolswith______handlesshouldbeusedtocheckelectriccircuit.A.plasticB.metalC.stainlesssteelD.copper56.Itiswellknownthatthewholepowerdistributionoftheship’selectricalservicesmainlydependonthe______.A.sub-boardsB.mainswitchboardsC.emergencyswitchboardsD.distributionboards57.The______isusedtomeasurecurrent.A.ammeterB.voltmeterC.wattmeterD.frequencymeterIfthejacketwatertemperatureofanoperatingdieselenginesuddenlyrisesabovenormal,thecausecanbeattributedto_____________.

anoverfilledexpansiontank

excesschromate(铬酸盐)treatmentofthejacketwater

acloggedrawwaterseasuction

cavitationerosionoftheheatexchangertubes

TheCompanyshouldensurethat______involvedintheCompany’sSMShaveanadequate

understandingofrelevantrules,regulations,codesandguidelines.A.mastersB.chiefengineersC.crewD.personnel60.Routinemonitoringofadieselengineshouldinclude______.A.checkingforleaksB.checkingtemperaturesandpressuresC.listeningforabnormalnoisesD.alloftheabove.61.Ifyourvesselhasastarboardlistaftertakingonfuel,youwouldtransferfuel______.A.tostarboardB.toportC.forwardD.aftTheconventionsunderwhichtheportstatecontrolinspectioniscarriedoutincludeallthefollowingexcept______.

A.SOLAS74B.MARPOL73/78C.STCW78/95D.ISMCode

______mayhavetwoemergencysourceofpower,thusrequiringtwoemergency

switchboards.

A.LargepassengervesselsB.GeneralcargoshipsC.ContainershipsD.Oiltankers

64.Tellyourmen______therulesandproceduresofworkingwhendismantlingtheequipment.

A.nottogoagainstB.don’tgoagainstC.notgotoagainstD.tonotgoagainst

65.Whichofthefollowingsisleastlikelytocausetheignitionoffuelvapors?

A.StaticelectricityB.AnopenrunningelectricmotorC.LoosewiringD.Explosionprooflights

Theterm‘propermetering’,asappliedtoadieselfuelinjectionsystem,canbebestdefinedas______.

deliveringthesamequantityoffueltoeachcylinderforeachpowerstrokeaccordingtoengine

load

maintainingthemeteringadjustmentforareasonableperiodunderallloadconditions

timingfuelinjectiontoobtainmaximumpowerandgoodfueleconomy

distributingthefueltoallpartsofthecombustionchamberforpropercombustion

67.Administrationsshouldbearinmindthesignificance（重要性）of______inmaintaining

safetyoflifeandpropertyatseaandinpreventingmarinepollution.

A.advancednauticalequipmentB.advancedperformancemainengines

C.emergencyequipmentD.communicationandlanguage

skills

Duringinspectionofthemachineryspace,whichofthefollowingstatementspointstoanunsatisfactoryorganizationofthesystematicmaintenance?

A.missingvalvehandwheelsB.dirtytanktops

C.alargenumberoftemporaryrepairsD.Alloftheabove.

二、关系题（每组关系题题干下有4个小题，每题4个选项）

第一组：

Thecylindercoverismadeofcastironandisprovidedwithtwoinletvalves,twoexhaustvalves,acentralmountedfuelinjectionvalveandanindicatorvalve.Theinletvalvesaremountedwithseparateseatingringsmadeofspecialheat-resistantcastiron.Theseringsarepressedintothecylindercoverincooledconditions.Theexhaustvalveseatingsarespecial,water-cooledseatingrings.Theseringsarealsopressedintothecylindercoverincooledconditions.

Eachcylindercoverisprovidedwithcoolingwaterfromascrewed-ontubularcoolingwaterjacketthroughradialboresinthethickbottomofthecover.Eachoftheradialboresisconnectedtotwosidebores.Thecoverhasfurtherseparateboresthatleadtothecoolingwaterjacketandtheboresinthecylindercovertoacommonoutletchamber.Thecylindercoverandcylinderlinerareassembledbymeansoffourthreadedstudsscrewedintotheframe.Tighteningiseffectedbymeansofhydraulictools,andsealingbymeansofathinringmountedbetweenthecylindercoverandthecylinderliner.Astartingvalveismountedonthesideofthecylindercover.

Theenginehasoil-cooledpistonsofcastiron.Thepistonsareprovidedwiththreecompressionringsandaspring-loadedscraperring.Aspaceforcoolingoilisprovidedatthetopofthepiston.

Thescraperringpreventslubricatingoilfrombeingdrawnupintothecombustionchamber.

Oilforcoolingthepistoncrownisledfromaboreinthecrankshaftthroughachannelintheconnectingrodandtheconnectingrodjournal,tothebushingforthegudgeonpin.Thisbushingisprovidedwithanannulargroovefromwhichpartoftheoilisledforlubricatingthegudgeonpin.Theremainingoilcontinuesthroughboresinthegudgeonpinandthepistontopistoncoolingchamber.69.Thispassageismainlyabout______.A.cylindersandcylindercoversB.cylindersandpistonsC.cylindercoversandpistonsD.cylindersandoil70.Whichofthefollowingmaybeprovidedontopofthecylindercover?A.twoexhaustvalvesB.astartingvalveC.anindicatorD.alloftheaboveWhichofthefollowingistrue?

Theinletvalveseatingringsareofheat-resistantcaststeel.

Therearesixstudsbywhichthecylindercoverandlineraretightened.

Theexhaustvalveseatingsarecooledbywater.

Acopperringismountedbetweenthecylindercoverandtheliner.

WhichofthefollowingisNOTtrue?

Thepistonsarecooledbyoil.

Fourpistonringsarefittedtoeachpiston.

Thescraperringscrapestheoildownwards.

Thepistoncoolingisofsplashtype.

第二组：

BeckSmith,aPSCOfromPortHamburger,iscarryingoutaninspectioninthemachineryspaceofM/VSUN.HereisadialoguebetweenthePSCOandtheChiefengineer.

PSCO:Chiefengineer,yourescaperoutemarkedinarrowsatstairs,orcorridorstoemergencyexitshouldbeclearlysightedindark.Thesemarksshouldbesmearedinfluorescence（荧光）inordertoevacuatewhenlightingiscutoff.

ChiefEngineer:OK,Iwillrectifythisasquicklyaspossible.

PSCO:Onemore,yourpumpinglinemayslightlyleakoil

ChiefEngineer:No.Ourpumpinglinehasnotroubleatall.

PSCO:Trustme.IhaveservedChiefEngineerformanyyears.Thereissomewhereleakingoil.

ChiefEngineer:Howdoyouknow?

PSCO:Oiltankbottomisverycleanbutwithoilybrightness.Significantly,youpreparedforPSCinspectionforquitealongtime.Asleakingoil,youcleanedsecondtimejustnow.

ChiefEngineer:Youareverysmart!Yes,onesmallplaceleakedoilandIplannedtofixitafterPSCinspectionbecausetimeislimited.

PSCO:Letmechecktheleakingoilplaceandassistyoutofindoutasolution.

ChiefEngineer:Thanks.

PSCO:Accordingtoyourrecord,youhaveusedoilywaterseparatortohandleoilywater.

Ifoundyourinletvalveofthemachineisdryandrusty.Isuspectedthatyourrecordisuntrue.

Whereisyour50tonsoilywater?Didyoupumpoutinhighseas?

ChiefEngineer:Wepumpedintoanothership.

PSCO:Whatistheship’sname/callsi