甲类三管英语考试试题

1、Inthetwostrokedieselengine,itisdesignedsothattheoilimpingementistimedtoproceedonlyonthe

pistonringbeltduring.

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.©crashstopofengine;©increasedback

pressureafterT.Ch.；③fouledordamagedturbinenozzlering.

A.allarecorrectB.②and③arecorrect

C.noneoftheaboveiscorrectD.①onlyiscorrect

6、Whenasuddenincreaseinsteamdemandoccursfromtheboiler,thewaterlevelinthedrumatthehigher

pressurewill.

A.risequicklyB.riseslowly

C.dropquicklyD.dropslowly

7、Onmodernships,centrifugalpumpwithaself-primerhasreplacedreciprocatingpumpasbilgepump

because.

A.centrifugalpumpischeaperthanreciprocatingpump

B.thesizeofcentrifugalpumpwithsamecapacityissmallerthanthatofreciprocatingpump

C.centrifugalpumpmakesmaintenanceeasierthanreciprocatingpumpdose

D.alloftheabove

8、Whichcauseoffollowingwillnotlead(orefrigerationplantshort-cycle?

A.lackofrefrigerantB.refrigerantwithmuchwater

C.setdefectivelylowpressurerelayD.nocoolingwater

9、Toreceiveoilresiduesfromthepurificationoffuelandlubricatingoilsinthemachineryspaces,whatkind

oftank(s)shouldbeprovidedonboard?

A.bilgetankB.sludgetankC.overflowtankD.oilcollectingtank

10、Theoildischargemonitoringsystemintheoiltankervesselsisusedfordetectingtheamountofoil

dischargedoverboardtoensurethatitdoesnotexceed.

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,whatisthenumberofitsefficientworkstrokeper

revolution?

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一①crashstopofengine;⑵increasedback

pressureafterT.Ch.;(3)foiiledordamagedturbinenozzlering.

A.allarecorrectB.②and③arecorrect

C.noneoftheaboveiscorrectD.①onlyiscorrect

18Afewspotsofturbochargersurgingcanbecausedby.©crashstopofengine;(2)rapidincreaseof

enginespeed.

A.①onlyiscorrectB.②onlyiscorrect

C.both①and②arecorrectD.neither(1)or②iscorrect

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/A"notedonthenameplateofanon-synchronousmotormeansthat.

A.thearmatureterminalsofthemotorshouldbeconnectedinstarformationwhenvoltageofpowersupplyis

380V

B.thearmatureterminalsofthemotorshouldbeconnectedindeltaformationwhenvoltageofpowersupplyis

220V

C.bothAandBarecorrect

D.thearmatureterminalsofthemotorshouldbeconnectedinreversewaysofAandB

22TheinitialvoltageofSelf-excitationgeneratorisgenerallysetupby.

A.residualmagnetismB.voltageregulator

C.electricalcurrentforexcitationD.theotherrunninggenerator

23TheDCexcitationtothefieldofBrushlesssynchronousgeneratorisgenerallyproducedby.

A.aexciterdrivenbythesameshaftwiththegenerator

B.aexciterdrivenbyexternalprimemover

C.generatoritself

D.eitherAorB

24Whenasuddenincreaseinsteamdemandoccursfromtheboiler,thewaterlevelinthedrumatthehigher

pressurewill.

A.risequicklyB.riseslowly

C.dropquicklyD.dropslowly

25Whenasuddenincreaseinsteamdemandcomestonormal,thedrumpressurewillandwaterlevel

inthedrumwill.

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-primerhasreplacedreciprocatingpumpasbilgepump

because.

A.centrifugalpumpischeaperthanreciprocatingpump

B.thesizeofcentrifugalpumpwithsamecapacityissmallerthanthatofreciprocatingpump

C.centrifugalpumpmakesmaintenanceeasierthanreciprocatingpumpdose

D.alloftheabove

3022Toreceiveoilresiduesfromthepurificationoffuelandlubricatingoilsinthemachineryspaces,what

kindoftank(s)shouldbeprovidedonboard?

A.bilgetankB.sludgetankC.overflowtankD.oilcollectingtank

3123Accordingtotheprincipleoftwostrokedieselengine,whatisthenumberofitsefficientworkstroke

perrevolution?

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

3224Therewillusuallybesummariesordailyaccounttablesforheavyoil,dieseloil,lubricatingoil,and

freshwater,whichwillbecompiled.

A.atthebeginningofeverywatchB.atthebeginningofthefirstwatcheveryday

C.atthecompletionofeverywatchD.atnooneveryday

33However,whereimmediateactionisnecessarytoensuresafetyoftheship,itsmachineryandcrew,itmust

betakenbytheengineerincharge.Whatdoes"it”meaninthesentenceabove?

A.safetyB.theship,itsmachineryandcrew

C.immediateactionD.theengineerincharge

34Whatisusedforpreventingpollutiondamagetotheseafromships?

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

35Duringtoursofinspectioninthemachineryspace,youfoundafireonarunninggenerator,whatshouldyou

dofirst?

A.informchiefengineerofficerimmediatelyB.stopthegenerator

C.letthedutyofficerinbridgedeterminehowtodoD.waitforhelp

36Whichcauseoffollowingwillnotleadtorefrigerationplantshort-cycle?

A.lackofrefrigerantB.refrigerantwithmuchwater

C.setdefectivelylowpressurerelayD.nocoolingwater

37Iftwofuelservicetanksareinstalled,theemptytankshouldbepumpedupdirectlyitisempty.Whatisthe

meaningof“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.reducingthec|iiantit\ofwalerconlainedinoilD.reducingcargodischargedtime

41Whichsystem(s)inthehydraulicsystemsofcranealwayshold(s)singlesideofload?

A.hoistingsystemonlyB.hoistingsystemandluffingsystem

C.hoistingsystemandslewingsystemD.slewingsystemonly

42Onwhatdoyoudependhavingtheaircoolerofmainenginechemicallywashed?

A.increasedairpressuredifferencebeforeandaftaircooler

B.reducedexhausttemperatureinallcylinders

C.reducedtemperaturedifferencebetweenwaterinletandoutlet

D.bothAandC

43Whichoneofthreeelementsforafireonatankervesselismostdifficulttoeliminate(isolate)?

A.acombustibleelement,fuel

B.energy(resourcesforignition)tostartthecombustion

C.oxygentosupportthecombustion

D.bothAandCarecorrect

44Thecranejibisraisedandloweredbymeansof.

A.amooringwinchB.ahoistingwinchC.aslewingwinchD.aluffingwinch

45Thegaugepressureinsideacontaineris-0.5kg/cm2,thenwhatistheabsolutepressureexertedtotheinside

surfaceofthiscontainer?

A.0.05MpaB.0.95MpaC.1.05MpaD.0.5Mpa

46Aprocessofcomparingtheactualperformanceofamachinewiththeintendedperformance,andthen

adjustingthemachinetoreduceandeventuallyeliminatethedifferencebetweentheactualandintended

performanceiscalled.

A.openloopcontrolB.feedbackC.combiningcontrolD.integralprocess

47Whatistheresultofconverting10℃intodegreeofFahrenheit?

基础P169华氏=1.8摄氏+32

A.0TB.18TC.32TD.50T

48Whencomparingtheairwith50%ofrelativehumiditywiththeairwith100%ofrelativehumidity,which

onewillholdmorewater?

A.theformerB.thelatterC.notforsureD.sameeachother

49WhichofthefollowingequipmentcannotbeusedforthewasteheatrecoveryoftheM/Etofurther

improveitsthermalefficiency?

A.M.EturbochargerB.exhaustgasboilerC.incineratorD.freshwatergenerator

50Foragivenexhaustgasboiler,whatisthequantityofit'sevaporationmainlydetermined?

A.thetemperatureandflowquantityoftheexhaustgasfromM.E

B.thequantityofsteamdemanded

C.therotaryspeedandthecoolingwatertemperatureofmainengine

D.efficiencyofM.Eturbocharger

51Thewaterlevelofanexhaustgasboilerwhichisindependentoftheauxiliaryboilerandjustastheextra

heatingsurfaceofit.

A.willbemodulatedinproportion

B.willbemodulatedinproportionandintegral

C.willbemodulatedinproportionanddifferential

D.willnotbemodulatedatall

52Inheavymarineenginethepracticeistodrivetheengineonwhichhaspreviouslybeenstoredin

startingairreservoirs.

A.electricmotorB.hydraulicmotorC.compressedairD.turninggear

53Whichoneoffollowingstatementisnottrueconcerningthesuitablesitesofthedirectactingreliefvalve

andthepilotoperatedrelievevalve?

A.thedirectactingreliefvalveisusedforcontrollinglowerflowsandpressure

B.thepilotoperatedreliefvalveisusedfbrcontrollinghigherflowsandpressures

C.thepilotoperatedreliefvalveisusedforcontrollinglowerflowsandpressures

D.thecontrollingaccuracyofdirectactingreliefvalveisworsethanthatofthepilotoperatedreliefvalve

54Whichofthefollowingstatementsconcerningthewatertubeandfiretubeboilersisnottrue?

A.naturalcirculationofthewaterinthewatertubeboilerisbetterthanthatinthefiretubeboiler

B.forthesameoutput,thewatertubeboilerwillcarrylessmassofwatercomparedwiththefiretubeboiler

C.thewatertubeboilerwillcostshortertimeforsteamraising

D.thewatertubeboilerrequirelowerskillinoperatingandmaintaining

55AqueousFilmFormingFoam(AFFF),commonlyknownaslightwater1,isespeciallysuitableforfighting

A.oilfiresintheengineroombilges

B.classBfiresinpaintlockers

C.anyclassDfire

D.alloftheabove

56Inmostpumpsandpumpmotors,overpackingtheballbearingsfullofgreasewillresultin.

A.moistureemulsificationofthebearinggrease

B.insufficientcirculationandoverheatingofthebearing

C.propergreasecirculationtocoolthebearing

D.slidingfrictionbetweenballsandraces

57Theclutchbandofaconstanttensioningmooringwinchmustbesetuptightenoughtodrivethewinch

drumandshouldsliponlywhen.

A.excessiveloadsareplacedonthewinch

B.minimumpullisbeingexertedbythewinch

C.automaticoperationofthewinchisdesired

D.wireisbeingretrievedatthemaximumrate

58Theefficiencyandoutputcapacityofalowpressuredistillingplantwillbereducedifthelasteffectshell

A.pressuredoesnotfluctuaterapidly

B.pressureremainssteadyandunchanged

C.brinedensitydoesnotexceed1.5

D.brinedensityistoolow

59Inarefrigerationsystem,whichofthefollowingstatementsdescribestheactionsoccurringwhenasolenoid

valve,usedinconjunctionwithanunloaderhead,isenergized?

A.Thesolenoidvalvedirectshighpressuregastothevalveliftingdeviceraisingthesuctionvalveoffits

seatandcausingonespecificcylindertobecomeunloaded.

B.Thesolenoidvalvedirectshighpressuregastotheundersideoftheunloadingpiston,causingittorise

andallowingtherecirculatingportstobeopened.

C.Whenthesolenoidvalvebecomesenergized,thevalveportsbecomeclosed,allowingdischarge

pressuretobuildupabovethepiston,shiftingitandcausingittounload.

D.Thesolenoidvalveallowstherefrigeranttopassfromthesuctionchambertothetopoftheunloader

piston,causingthepistontoliftandunloadthecylinder.

60Whichofthematerialslistedisusedasthedynamicsealmaterialonmechanicalsealsinstalledonmost

centrifugalpumpsusedinwaterservice?

A.Copper.铜

B.Copperandcarbon.

C.Carbon.辅机P23

D.Bronze.青铜

61Theheatedfeedwaterenteringanyflashchamberofaflash-typeevaporatorwill.

A.vaporize,withtheunflashedwaterremainingatthetemperatureatwhichitenteredtheflashchamber

B.vaporize,withtheunflashedwaterequalizingtothesaturationconditionsexistingintheflashchamber

C.vaporize,withtheremainingwateratatemperaturegreaterthanitenteredtheflashchamber

D.boil,allowingsteambubblestorisethroughthebrineatthebottomoftheflashchamber

62Thethreebasicpartsofanyeductorarethenozzle,thesuctionchamber,andthe.

A.injector

B.compressor

C.diffuser

D.siphon

63ToavoiddamagingthecomponentsofaprintedcircuitboardwhentestingitwithaDCvolt-ohmmeter,you

should.

A.groundtheboard

B.avoidreversingthepolarityoftheleads

C.isolatesensitivecomponentswithheatsinks

D.alloftheabove

64Whichofthefollowingactionsshouldbetakenifduringaroutinemaintenanceinspectionofacentrifugal

pump,localizedscoring亥ij痕onapumpshaftsleeveisdetected?

A.Correctthecauseofthescoringandrepairthesleeveorreplacewithanewone.

B.Reassembletheunitandprovidemorewaterleakoffforproperlubrication.

C.Checkforparallelalignmentofthesleeveradialfacestothesleevebores.

D.Reassembletheunitandadjustthegovernortoobtainaslowerspeed.

65Compensatedflowcontrol,orconstantflowvalvesareusedinhydraulicsystemsto.

A.compensateformajorleaksinthesystem

B.maintaindieoriginalfluidviscosity

C.allowforchangesinpressureandtemperaturewithinthesystem

D.assureconstantfluidtemperature

66Althoughlubeoilsusedinthemainlubricatingservicesystemsshouldhavearelativelyhighflashpointto

avoidignition,theycancreatesmokeandfirehazardswhenthey.

A.areexposedtoavacuum

B.comeincontactwithextremelyhotsurfaces

C.arereducedintemperaturetojustabovethepourpoint

D.becomeextremelyagitatedoraerated

67Forthepropercontroloftheairtemperatureinanairconditioningsystemusingchilledwatercirculation,

whichofthelistedconditionsshouldremainconstantregardlessofloadchanges?

A.Chilledwatersystemsupplytemperature.

B.Chilledwatersystemreturntemperature.

C.Compressordischargetemperature.

D.Compressorsuctionpressure.

68Hydraulically,servo-operated,automatic,changeovervalves,utilizedinatworamhydraulicsteeringgear,

serveto.

A.allowanalternatemainpumptostartinthefullyloadedconditionthusdevelopingimmediatefull

torque

B.preventeithermainpumpfrombeinghydraulicallymotoredwhenidlebycrosspressureflow

C.preventbothunitsfromoperatingsimultaneouslywhichcouldresultindoublingtheflowofoiland

pressureleadingtooverpressurizationofthesystem

D.alloftheabove

69Inanelectro-hydraulicsteeringgear,anychangeinrelativepositionbetweenthesynchronousreceiverand

thefollow-upgearwillresultin.

A.thepumpgoingtofullstroke

B.closingofthesix-wayvalve

C.drivingtheramsupagainstthestops

D.acorrespondingslowingorincreasingofthepumpedflowrate

70Whichofthefollowingproblemswilloccuriftheinternaldrainateitherendofahydraulic,two-way,

spool-typedirectionalcontrolvalvecylinderweretobecomeplugged?

A.Thereservoirwouldbecomevaporbound.

B.Thevalvewouldbeplacedinhydrauliclock.

C.Thespringloadedreliefportswouldopen.

D.Thebufferingchamberswouldbeunabletofunction.

71Themajordifferencebetweenthedischargeandsuctionvalvesinstalledinmostlowpressure,reciprocating

aircompressorsisthat.

A.onevalveseatsupwards,whiletheotherseatsdownwards

B.thereedvalvesusedonthedischargearemadesubstantiallythickerandheavierthanthesuctionvalves

C.thesuctionvalvespringsexertagreatertensionthanthedischargevalvesprings

D.thedischargevalvespringsexertagreatertensionthanthesuctionvalvesprings

72CFC氟氯化炭refrigerantsexposedtohightempertureordirectflame,willdecomposeandmayproduce

A.methylchloride

B.ammonia

C.hydrofluoricacid

D.ozone臭氧

73Operationalamplifiers,usedprimarilyinanalogcircuits,arecharacterizedby.

A.highinputimpedance,highgainandlowoutputimpedance

B.highinputimpedance,highgainandhighoutputimpedance

C.lowinputimpedance,lowgainandhighoutputimpedance

D.lowinputimpedance,highgainandlowoutputimpedance

74Withno.landno.2alternatorsrunninginparallelandthekWloadsequallyshared,onealternatoris

drawingmuchhighercurrentthantheother.Whatdoesthisindicate?

A.Thealternatorsarenotgeneratingthesamevoltagesandshouldbeadjustedonautomaticvoltage

regulatorrheostats

B.Alternatorfrequenciesaredifferentandshouldbeadjustedonthegovernorspeedcontrollers

C.Alternatorsareoutofphaseandshouldbetrippedandparalleledagain

D.Onealternatorhaslostoneofitsphases

75Thecylindercoversaresecuredbyeightelasticholding-downarrangedinfourpairs.

A.nutsB.screwsC.studsD.flanges

76Thereisasupportringbetweenthecylinderblockandthecollarofthecylinderliner,thuscarryingboththe

linerandthecylindercover.Italsopassestothecoolingboresandtothecover

A.coolingwaterB.coolingoilC.refrigerantD.lubricateoil

77AclearlyvisiblebenefitofRT-flexenginesistheiroperationatallshipspeeds.Thisisachieved

bythesuperiorcombustionperformance.

A.shocklessB.smokelessC.novibrationD.noiseless

78ThekeyfeatureoftheSulzerRT-flexsystemisthatitgivescompletefreedomintheandoperationof

fuelinjectionandexhaustvalveactuation.

A.meteringB.controlC.usingD.timing

79Thedevelopmentgoalsforalargemarineenginearemany,ofteninteractandinsomecaseseven

witheachother

A.conflict突B.accordC.harmonizeD.stmggle

80Thepistoncrownemploystheusualjet-shakerprinciplewithanarrangementofcoolingbores

inthecrownsothatthesurfacetemperaturesofthecrownaremoderatewithaveryevendistribution.

A.watercoolingB.oilcoolingC.aircoolingD.combinedcooling

81Thescavengeairreceiverisofasimplifiedandmodulardesignwithintegralnon-retumflaps,hanging

coolerandtwoauxiliaryairblowers.

A.dozensB.parcelsC.BundlesD.Gallons

828.Forauxiliaryenginesthepermissibleoverloadisforonehoureverytwelvehours.

A.10%B.15%c.20%D,25%

83Toppistonringsareplasmacoated.Itgivesaddedsafetyfortheofnewliners.

A.running-inB.running-outC.running_onD.running_down

84Aroundthecombustionchamber,allthemaincomponentsaretogivelowthermalstrainsandthe

smallest,circumferentially-symmetricdeformationsforgoodsealingbetweenpistonringsandliner.

A.drillcooledB.holecooledC.tubecooledD.borecooled

85Aroundthecombustionchamber,allthemaincomponentsareborecooledtogivelowstrainsandthe

smallest,circumferentially-symmetricdeformationsforgoodsealingbetweenpistonringsandliner.

A.thermalB.mechanicalC.plasticD.elastic

86Thetoppistonringisplasmacoatedtogivethelowestwearratetoreachthegoaloftwo-years9

withsufficientmargin.

A.TBOtimebetweenoverhaulB.CEOC.CFOD.MCR

87Greatcareisdedicatedtotheremovaloffromthescavengeair.

A.gravityB.viscosityC.densityD.humidity

88Theheavy-dutylubricatingoilwithchemicalhasbeenwidelyintroducedinrecentyears.

A.additivesB.behaviorC.coolantD.desiccant

89onboardshipareusedtocontrolanddistributetheelectricalenergygeneratedbygenerators.

A.GovemorsB.AlternatorsC.BlackboardsD.Switchboards

90Theseacidresiduesmustbepreventedfromenteringthecrankcase,otherwisethelubeoilwouldbe

A.contaminatedB.emulsifiedC.deterioratedD.oxidated

91Mainenginesaswellasauxiliaryenginesoperatingonheavyfuelshouldhavecontinuousonthe

lubricatingoil,eitheraccordingtothebypassorbatchprinciples.

A.filteringB.centrifugingC.depositingD.operating

92Inengineswithsystem,thelubricatingoilcanbeaddedtotheenginethroughthefillingholeinthe

crankcasecover,byusingahandoilcan,orthroughtheseparatorpipe

A.lubricatingoilB.drysumpC.circulatedtankD.wetsump

93Governorsareequippedwithmotorsforsynchronizing,loadsharingandfrequencycontrol.

A.speedsettingB.loadsettingC.speedchangingD.loadsetting

94Engines,whicharetoberuninparallelhavegovernorsspeciallyadaptedforthesame,about

4%toobtainbasicloadsharing.

A.speedsettingsB.speeddroopsC.speeddropsD.speedchanges

95Theairrequiredforcombustionistakenfromtheengineroomthroughafilterfittedontheturbocharger.

Thisreducestheriskfortooandcontaminationofthecombustionair.

A.hightemperaturesB.lowtemperaturesC.wetD.dirty

96Theoilsump,alightweldeddesign,ismountedontheengineblockfrombelowandsealedby.

A.O-ringB.gasketC.washer5D.packing

97Moderncentrifugedesignsenablecontinuousoveraconsiderableperiodoftime.Thisisachieved

bywhichistimedtodischargethesludgeatregularintervals.

A.aninjectionprocessB.anejectionprocess

C.aseparationprocessD.aheatingprocess

98Thepurposeoftheskirtortrunkinfour-strokecycleenginesistoactinasimilarmannertoa.

A.crossheadB.crown

C.pistonrodD.connectingrod

99Theswitchboardsarethoseinwhichallthelivepartsareinstalledbehindthepanelsandonlythe

operatinghandlesandinstrumentsareonthefront.

A.openB.openfronttype

C.livefronttypeD.deadfronttype

lOOBecauseofthehighloadsthebearingmaterialisatin-aluminumalloybondedtoasteelshell.The

crossheadpinishighlypolishedtoa.

A.flatsurfaceB.mirrorfinish

C.slopingsurfaceD.inclinedsurface

101Wheretanksarearrangedforeitheroilorballastmustbefittedinthepipesothatonlytheballast

mainortheoiltransfermainconnectedtothetank..

A.aseawaterchestB.ach