最新甲类三管英语考试试题 精品.docx

最新甲类三管英语考试试题 精品.docx

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最新甲类三管英语考试试题精品

1、Inthetwostrokedieselengine,itisdesignedsothattheoilimpingementistimedtoproceedonlyonthepistonringbeltduring________.

A.compressionstrokeB.suctionstrokeC.expansionstrokeD.exhauststroke

2、Inafourstrokeengine,whichprocesslaststhelongestperiod?

A.exhaustandsuctionprocessB.suctionandcompressionprocess

C.combustionandexhaustprocessD.workingandexhaustprocess

3、Onwhatdoyoudependhavingtheaircoolerofmainenginechemicallywashed?

A.increasedairpressuredifferencebeforeandaftaircooler

B.reducedexhausttemperatureinallcylinders

C.reducedtemperaturedifferencebetweenwaterinletandoutlet

D.bothAandC

4、Whenoccurringafireinthescavengeairbox,thefollowingmeasuresshouldbetakenexceptfor________.

A.reducingspeedtoSLOWandaskingbridgeforpermissiontostop

B.stoppingthefueloilsupply

C.switching-ontheauxiliaryblowers

D.puttingthescavengeairboxfireextinguishingequipmentintofunction

5、Continuoussurgingofturbochargercanbecausedby________.①crashstopofengine;②increasedbackpressureafterT.Ch.;③fouledordamagedturbinenozzlering.

A.allarecorrectB.②and③arecorrect

C.noneoftheaboveiscorrectD.①onlyiscorrect

6、Whenasuddenincreaseinsteamdemandoccursfromtheboiler,thewaterlevelinthedrumatthehigherpressurewill_______.

A.risequicklyB.riseslowly

C.dropquicklyD.dropslowly

7、Onmodernships,centrifugalpumpwithaself-primerhasreplacedreciprocatingpumpasbilgepumpbecause________.

A.centrifugalpumpischeaperthanreciprocatingpump

B.thesizeofcentrifugalpumpwithsamecapacityissmallerthanthatofreciprocatingpump

C.centrifugalpumpmakesmaintenanceeasierthanreciprocatingpumpdose

D.alloftheabove

8、Whichcauseoffollowingwillnotleadtorefrigerationplantshort-cycle?

A.lackofrefrigerantB.refrigerantwithmuchwater

C.setdefectivelylowpressurerelayD.nocoolingwater

9、Toreceiveoilresiduesfromthepurificationoffuelandlubricatingoilsinthemachineryspaces,whatkindoftank（s）shouldbeprovidedonboard?

A.bilgetankB.sludgetankC.overflowtankD.oilcollectingtank

10、Theoildischargemonitoringsystemintheoiltankervesselsisusedfordetectingtheamountofoildischargedoverboardtoensurethatitdoesnotexceed__________.

A.15liters/nauticalmileB.30liters/nauticalmile

C.60liters/nauticalmileD.100liters/nauticalmile

11、Whichofthefollowingfunctionsisnotoneofthefunctionsofairconditioner?

A.refreshingtheair

B.makingpersonupset

C.adjustingtheairhumidity

D.adjustingtheairtemperature

12、Whichofthefollowingstatementsisnottrueconcerningsymptomofafireinthescavengeairbox?

A.anincreaseintheexhausttemperatureoftheaffectedcylinder

B.theturbochargermaysurge

C.theexplosionpressureinallcylinderswillriseviolently

D.smokefromtheturbochargerairinletfilterwillbeseen

13Whattypeofelectricmotorismostcommonlyusedonboardship?

A.non-synchronouselectricmotor

B.synchronouselectricmotor

C.fullyenclosedelectricmotor

D.watertightelectricmotor

14Accordingtotheprincipleoffourstrokedieselengine,whatisthenumberofitsefficientworkstrokeperrevolution?

A.1/2B.1C.2D.3

15Whatisheadtankintheclosedcoolingwatersystemusedfor?

A.forthereleaseofairfromthecoolingwater

B.providingexpansionroomforheatedcoolingwater

C.aplaceforimplementingwaterandwatertreatmentagent

D.alloftheabove

16Thefunctionofsynchronouscompensatingmachineisto________.

A.improvepowerfactor

B.reducevoltageoscillation

C.increasetheinsulationofcircuits

D.eliminateregeneratedmagneticfields

17Continuoussurgingofturbochargercanbecausedby________.①crashstopofengine;②increasedbackpressureafterT.Ch.;③fouledordamagedturbinenozzlering.

A.allarecorrectB.②and③arecorrect

C.noneoftheaboveiscorrectD.①onlyiscorrect

18Afewspotsofturbochargersurgingcanbecausedby_______.①crashstopofengine;②rapidincreaseofenginespeed.

A.①onlyiscorrectB.②onlyiscorrect

C.both①and②arecorrectD.neither①or②iscorrect

19Withoneormorecylindersoutofoperation,theenginespeedmustbereducedbecause_______.

A.insuchcases,theairsupplyisnolongeroptimal,thethermalloadwillbehigher

B.governorhuntingwilloccur

C.torsionalvibrationsaswellasothermechanicalvibrationsmayoccur

D.alloftheabovearecorrect

20ThenameplateofaACnon-synchronousmotorshowsthatrunningspeedis1460r/min,frequency50Hz.Youcaninferthatthenumberofmagneticpolesis_______.

A.2B.4C.6D.8

21“380V/220VY/Δ”notedonthenameplateofanon-synchronousmotormeansthat________.

A.thearmatureterminalsofthemotorshouldbeconnectedinstarformationwhenvoltageofpowersupplyis380V

B.thearmatureterminalsofthemotorshouldbeconnectedindeltaformationwhenvoltageofpowersupplyis220V

C.bothAandBarecorrect

D.thearmatureterminalsofthemotorshouldbeconnectedinreversewaysofAandB

22TheinitialvoltageofSelf-excitationgeneratorisgenerallysetupby_______.

A.residualmagnetismB.voltageregulator

C.electricalcurrentforexcitationD.theotherrunninggenerator

23TheDCexcitationtothefieldofBrushlesssynchronousgeneratorisgenerallyproducedby________.

A.aexciterdrivenbythesameshaftwiththegenerator

B.aexciterdrivenbyexternalprimemover

C.generatoritself

D.eitherAorB

24Whenasuddenincreaseinsteamdemandoccursfromtheboiler,thewaterlevelinthedrumatthehigherpressurewill_______.

A.risequicklyB.riseslowly

C.dropquicklyD.dropslowly

25Whenasuddenincreaseinsteamdemandcomestonormal,thedrumpressurewill______andwaterlevelinthedrumwill________.

A.rise,risealsoB.rise,drop

C.drop,riseD.drop,dropalso

26Whichofthefollowingequipmentisnotpollutionpreventionequipment?

A.oilywaterseparatorB.sewagetreatmentplant

C.fueloilseparatorD.incinerator

27whichofthefollowingpumpsismostsuitableforanoilywaterseparator?

A.reciprocatingpumpB.vanepump

C.monopumpD.axial-flowpump

28Whichofthefollowingpumpswillmostaffectoily-waterseparatorperformanceandgivetheworstresult?

A.reciprocatingpumpB.vanepump

C.screwpumpD.centrifugalpump

29Onmodernships,centrifugalpumpwithaself-primerhasreplacedreciprocatingpumpasbilgepumpbecause________.

A.centrifugalpumpischeaperthanreciprocatingpump

B.thesizeofcentrifugalpumpwithsamecapacityissmallerthanthatofreciprocatingpump

C.centrifugalpumpmakesmaintenanceeasierthanreciprocatingpumpdose

D.alloftheabove

3022Toreceiveoilresiduesfromthepurificationoffuelandlubricatingoilsinthemachineryspaces,whatkindoftank（s）shouldbeprovidedonboard?

A.bilgetankB.sludgetankC.overflowtankD.oilcollectingtank

3123Accordingtotheprincipleoftwostrokedieselengine,whatisthenumberofitsefficientworkstrokeperrevolution?

A.1/2B.1C.2D.3

3224Therewillusuallybesummariesordailyaccounttablesforheavyoil,dieseloil,lubricatingoil,andfreshwater,whichwillbecompiled_________.

A.atthebeginningofeverywatchB.atthebeginningofthefirstwatcheveryday

C.atthecompletionofeverywatchD.atnooneveryday

33However,whereimmediateactionisnecessarytoensuresafetyoftheship,itsmachineryandcrew,itmustbetakenbytheengineerincharge.Whatdoes“it”meaninthesentenceabove?

A.safetyB.theship,itsmachineryandcrew

C.immediateactionD.theengineerincharge

34Whatisusedforpreventingpollutiondamagetotheseafromships?

A.MARPOL73/78B.SOLAS74C.STCW78/95D.ISPS2002

35Duringtoursofinspectioninthemachineryspace,youfoundafireonarunninggenerator,whatshouldyoudofirst?

A.informchiefengineerofficerimmediatelyB.stopthegenerator

C.letthedutyofficerinbridgedeterminehowtodoD.waitforhelp

36Whichcauseoffollowingwillnotleadtorefrigerationplantshort-cycle?

A.lackofrefrigerantB.refrigerantwithmuchwater

C.setdefectivelylowpressurerelayD.nocoolingwater

37Iftwofuelservicetanksareinstalled,theemptytankshouldbepumpedupdirectlyitisempty.Whatisthemeaningof“directly”inthesentenceabove?

A.atonceB.assoonasC.quicklyD.straight

38Fromviewpointofpractice,itissometimesimportanttodetectabnormalhappeningsintherunninggearby_________.

A.akeensenseofhearingB.richtheory

C.communicatingabilitywithothersD.repetitionwork

39Whereisthecoolingwaterfromthecompensatingtankinthecoolingwatersystemofmainengineleadto?

A.dischargesideofthecentrifugalpumpB.suctionsideofthecentrifugalpump

C.thelowestpointofthecoolingwatersystemD.inletofthemainengine

40Crudeoilwashingofcargotankshasthefollowingadvantagesexceptfor________.

A.reducingtheerosionofthecargotanksB.increasingthetotalquantityofoiltocarry

C.reducingthequantityofwatercontainedinoilD.reducingcargodischargedtime

41Whichsystem（s）inthehydraulicsystemsofcranealwayshold（s）singlesideofload?

A.hoistingsystemonlyB.hoistingsystemandluffingsystem

C.hoistingsystemandslewingsystemD.slewingsystemonly

42Onwhatdoyoudependhavingtheaircoolerofmainenginechemicallywashed?

A.increasedairpressuredifferencebeforeandaftaircooler

B.reducedexhausttemperatureinallcylinders

C.reduced