吉林大学版轮机英语考证指南配套题库

最新轮机英语题库第一章船舶动力装置1.“Beforedisconnectingtheoilpipe,wouldyouflushtheoilretainedinthepipe?”askedtheoilbargeowner√A．byusingoffreshwaterB．withcompressedair√C．byusingofseawaterD．withchemicalcompound2.“Standbyanengine”means_____√A．“preparetostoptheengine”B．“assembleanengineonitsbedplate”C．“makeanenginereadyforstarting”√D．“dismantleanengine”3.A_____isthefoundationoftheengine,withoutthesupportofwhichtheshaftalignmentinparticular,andenginestructureasawhole,wouldinevitablybelost√A．FrameB．Bedplate√C．CylinderD．Liner4._____arecommonlyusedinmechanical-hydraulicgovernortosenseenginespeeds√A．BulbsB．BulksC．Flyweights√D．Flywheels5._____aregenerallyformedintheframeofthebothin-lineandVeeenginestogivemaintenanceaccesstothecrankshaftmainandconnectingrodlargeendbearing√A．Doors√B．AspirategauzerC．CouplingD．Blind6._____deviceisprovidedtopreventstartingairfrombeingadmittedtothecylinderbeforethereversingiscompleted√A．AnautomaticB．AtransmissionC．Aself-regulatingD．Aninterlocking√7._____fueloils_____lubricatingoilsrequiretreatmentbeforepassingtotheengine√A．Both/and√B．Neither/norC．Either/orD．Both/or8._____issometimesusedforpistoncoolingsinceleaksintothecrankcasewouldnotcauseproblems√A．DieseloilB．Hydraulicoil第1页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库C．Lubeoil√D．Mineraloil9._____istheremovalofexhaustgasesbyblowinginfreshair√A．GasexchangeB．ChargingC．Scavenging√D．Supercharging10._____isusedforcylinderandcylinderhead,thesaltwaterisusedforcoolingthelubricatingoil,thefreshwaterinthecoolersandthechargingairintheaircooler√A．ThefueloilB．ThelubeoilC．TheseawaterD．Thefreshwater√11._____maybethefirstpossiblecausewhichmakestheenginetolosepowerorslowdownwhenitisrunning√A．Hotbearing√B．StartingvalvesC．UnequaldistributionofloadD．Excessivecrankshaftclearance12._____ofanenginecrankshaftcanbedetectedbymeasuringdeflectionsofcrankwebsforeachunitoftheengine√A．Misalignment√B．LengthC．StrengthD．Stresses13._____oftheA-framesthereisastrongcastironframecalledthescavengingairbox√A．Atthetop√B．AtthebottomC．InthetopD．Inthebottom14._____pistonshavelowinertiaandhighcoefficientofthermalexpansion√A．CastironB．CaststeelC．ForgedsteelD．Aluminum√15._____shouldnotundertakeanytaskwhichwillinterferewiththesupervisiondutiesrelatingtothemainmachineryandassociatedequipment√A．Thewatchkeepingpersonnel√B．ThechiefengineerC．ThepersononabunkerbargeD．Anyoftheabove16._____thecylinderwillcontainagreatweightofairandwillbecapableofburningagreatquantityoffuel√A．Atthebeginningofthecompressionstroke√B．AtthebeginningofthesuctionstrokeC．Attheendoftheworkingstroke第2页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库D．Attheendoftheexhauststroke17._____thesuperchargepressureis,_____poweranenginedevelops√A．Thehigher/themore√B．Higher/moreC．Higher/littleD．Thehigher/theless18._____isnotproperlysetthuscausingeitheradvancedorretardedfiring√A．ApistonB．Afuelinjectionpump√C．AfeedwaterpumpD．Alubeoilpump19._____rodsarenotinproperconditionsothattoomuchfuelissuppliedtothecorrespondingcylinder√A．PistonB．SoundingC．Regulating√D．Connecting20._____shows1√2meterandthespecificgravityoftheoilis0√96√Accordingtothemeasuringscale,thatmakes150tons√A．ThepistonrodB．ThepushrodC．Thesoundingrod√D．Theconnectingrod21._____allowsforexpansionandwatermakeupinthewatercoolingsystem√A．AtoptankB．Aheadtank√C．AheadvalveD．Adraintank22._____attheendofthedistributionpipeensuresthatadequatepressureismaintainedbythepump√A．AreliefvalveB．Analarm√C．ApressuregaugeD．Anon-maimvalve23._____isusedforwashinganddrinking√A．TheballastsystemB．ThesaltwatersystemC．ThebilgesystemD．Thedomesticsystem√24._____providethewatertothepistons√A．PneumaticpipesB．HydraulicpipesC．Telescopicpipes√D．Operatinggaspipes25._____arefittedintheexhaustsystemandfacilitatechargeremovalandscavengingineachcylinder√A．Diffusers√第3页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库B．CompressorsC．SteamboilersD．Sootblowers26._____areformedbyabrasiveparticlesenteringthebearingandscoringtheshaft√A．Grooves√B．RecessesC．RidgesD．Nips27._____aremountedonandboltedtothebed-platecrossgirders√A．ThecrankshaftB．ThecrankcaseC．Theguide-waysD．Theframes√28._____isaprecautionwhichcontributestoavoidingtroubleundernormaloperatingconditions√A．Constantinspection√B．KeepingconstantloadC．RemainingconstanttemperatureD．varyingspeed29._____isasourceofpowerbywhichthedieselenginemayoperate√A．WaterenergyB．ElectricalenergyC．ChemicalenergyD．Heatenergy√30._____isarrangedforcleaningthelubricatingoilinthesystemandcleanoilcanbeprovidedfromastoragetank√A．AfilterB．Acentrifuge√C．AdistillerD．Agenerator31._____isfullyfloatinginbothconnectingrodsmallendandthepistonskirt√A．ThepistonrodB．ThecrossheadpinC．Thegudgeonpin√活塞销D．Thecrank-pin32._____ismadeofabosswithseparatedbladesmountedintoit√A．Avariablepitchpropeller√B．AvariablepitchnutC．AfixedpitchparallelD．Afixedpitchscrew33._____isusuallydrivenbytheenginecamshaftandsuppliespilotairtothecylinderairstartvalve√A．AnairreceiverB．AnoperatingvalveC．AnautomaticvalveD．Anairdistributor√第4页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库34._____neutralizestheacidconditionsand_____cleansestheringsandgrooves√A．Thedetergency/thealkalinityB．Thealkalinity/thedetergency√C．Theinhabitant/thewaterD．Theadditives/thedistilledwater35._____orairventingarrangementisfittedtothefuelsupplypassage√A．AnairpumpB．AcompressorC．AfuelpumpD．Apriming√36._____providinglubricatingfilms,oilusedinmarinedieselengineshavetoremoveheatfromoilcooledpiston√A．ExceptforB．BesideC．ExceptD．Inadditionto√37._____theengines,thedieselengineis_____usedengineonboard√A．Between/morecommonlyB．Among/themostcommonly√C．Between/notmorecommonlyD．Among/notthemostcommonly38._____waterismoreexpensivethanfreshwater√Ithashighspecificheatandlowviscosity√A．Distilled√蒸馏B．DistillingC．BoilingD．Boiled39._____forthecamshaftgeartrainistakenfromaspurgearwhichforasixcylinderengineisatthecouplingend√A．ThedrivengearB．Thedrive√C．ThegreaseD．Thelubricatingoil40._____inwhatpositiontheenginestopstherewillalwaysbeatleastoneofthecylinderswithitsstartingairvalveopentoadmitcompressedairtostarttheengine√A．BecauseB．OwingtoC．ForD．Nomatter√41._____issecuredbymeansofside-chockboltsandend-chockbolts√A．Thebedplate√B．ThecolumnC．ThemainbearingD．Thedoublebottom42._____usuallyhelpstoinduceairmovementtoassistcombustion√第5页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库A．CylindercoverB．MainbearingC．TheexhaustvalveD．Thepistonmovement√43._____mayhavetwoemergencysourceofpower,thusrequiringtwoemergencyswitchboards√A．Largepassengervessels√B．GeneralcargoshipsC．ContainershipsD．Oiltankers44._____suppliespilotairtocontrolthecylinderairstartvalves√A．AnaircompressorB．AnindicatorcockC．Anairdistributor√D．Asafetyvalve45._____clearancesinthemainorcrankpinbearingswillsometimesbeindicatedbylossofpressureinthelubricatingsystembeforeanybearingknockisheard√A．ToolargerB．ToosmallerC．ExcessD．Excessive√过多46.Acaststeelstrongbackisfittedinwayofthecombustionspacetohelpabsorb_____√A．flametemperatureB．fueloilC．airmovementD．gasforces√47.Achargeoffreshairisdrawnintotheenginecylinderandthen_____bythemovingpiston_____veryhighpressure√A．pressed/toB．pressurized/withC．pushed/inD．compressed/to√48.Acommontroublewiththefuelpumpplungerorfuelvalvespindleis_____√A．waterleakageB．steamleakageC．oilleakage√D．airleakage49.Acommontroublewiththefuelpumpplungersorfuelvalvespindleis_____√A．brokendownB．stuckC．oilleakage√D．carbonized50.Adieselengineissimilartoagasolineengineexceptthattheformerhasno_____√A．cross-head第6页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库B．cylinderC．connectingrodD．sparkplug√51.Adieselenginescrankcaseoillevelisfoundtobetoohigh√Youshouldsuspectthat_____√A．theenginewasoverfilledB．theremightbeafuelleakC．theremightbeawaterleakD．alloftheabove√52.Adistancepiece,knownasa_____maybeinterposedbetweentherodandthebearinghousing√A．bearingshellB．bearinglinerC．compressionplate√D．leadwire53.Adistancepiece,withgroundfaces,knownasacompressionplate,maybeinterposedbetweentherodandthebeatinghousing,itsthicknessbeingchosentoensurethecorrect_____√A．compressionpressureB．compressiontestC．compressionratio√D．compressionclearance54.Adistancepiece,withgroundfaces,maybeinterposedbetweentherodandthebearinghousing,itsthicknessbeingchosentoensurethecorrect_____√A．expansionratioB．pressureratioC．compressionratio√D．clearanceratio55.Agovernorautomaticallycontrolsenginespeedbyregulating_____√A．fuelsupply√B．firingorderC．engineloadD．oillevel56.Agudgeonpininatrunkpistonmaybefreetofloatandrotate,with_____tolimitaxialmovement√A．splitpinsB．crankpinsC．dipsticksD．circlips√开口卡簧57.Aheaterinthecircuitfacilitateswarningoftheenginepriorto____bycirculatinghotwater√A．starting√B．stoppingC．tostartD．tostop58.Ahightemperaturealarmor_____whichwillmeltisusedtoguardagainsttheexplosionofcompressorairpipelines√A．aflametrap第7页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库B．areliefvalveC．afusibleplug√D．aburstingcap59.Ahotairstartpipeindicatesthatthereis_____√A．inefficientcoolingB．aleakingairstartvalve√C．acloggeddrainvalveD．aleakingairbottle60.Alevelgaugeforatankisto_____√A．givethepressureB．givethecontents√C．givetheshapeofthetankD．givetheaccuracylevel61.Alubricantoftenhastoperformmanydutiesinanysituation,inadditiontoitsfundamentaljobof_____√A．resistingoxidizationB．reducingfriction√减少摩擦C．promotingmovingspeedD．developinginertia62.Amainbearingconsistsoftwoshellswhicharesecuredbymeansofstudsand_____√A．tierodsB．throughboltsC．leadwiresD．bearingcaps√63.Anumberofcylinderlinersareenclosedinonecastironcasingtoforma_____√A．cylindercoverB．cylinderblock√C．cylinderframeD．bed-plate64.Areductioninloadonadieselengineresultsin_____ofspeedofthecrankshaft√A．areductionB．anincrease√增加C．anoutingD．adownwards65.Aseparatepistoncoolingsystemisused_____anycontaminationfrompistoncoolingglandstothepistoncoolingsystemonly√A．tohelpB．tolimit√限制C．toprotectD．toremove66.Aseparatepistoncoolingsystemisusedtolimitanycontamination_____pistoncoolingglands_____thepistoncoolingsystemonly√A．between,toB．either,orC．from,to√第8页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库D．neither,nor67.Asinglepiece_____fittedwithbronzeringsguidesthepistoninthecylinderliner√A．pistonskirt√B．pistoncrownC．guidewayD．cross-head68.Avariablepitchpropellerismade_____abosswithseparatebladesmountedintoit√A．ofB．upof√C．fromD．out69.A:PleasetellmethespecificationsandquantityB:_____√A．PumpdieseloilfirstB．300tonsof180cstfueloil√C．ThefigureisallrightD．OK,I’llsignit70.Abouthalfanhourbeforetheengineisrequired,coolingwaterat_____mustbecirculated√A．morethantheworkingtemperatureB．lessthantheworkingtemperatureC．theworkingtemperature√D．thesameasthesurroundingtemperature71.Accordingtothewaytheenergyoftheexhaustgasesisutilized,pressure-chargingcanbedividedintotwomainsystems,namely,theconstant-pressuresystemand_____√A．thepulse-phasesystemB．thepulseDopplersystemC．thepulsesystem√D．thepulseinterval72.Acidsolutioninthesystemcanbetestedfromtimetotimebyputtingsomeontoapieceoflime√A．strength√浓度B．denseC．percentageD．velocity73.Additives_____protectivelayersonmetalsurfacesguardingthemagainstcorrosion√A．damageB．form√C．dissolveD．contaminate74.Adjust_____bymeansofleadwire√A．theclearanceofthemainbearing√B．thediameterofmainbearingC．thegapofmainbeatingD．thetoleranceofmainbearing第9页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库75.Administrationsshouldbearinmindthesignificanceof_____inmaintainingsafetyoflifeandpropertyatseaandinpreventingmarinepollution√A．advancednauticalequipmentB．advancedperformancemainenginesC．emergencyequipmentD．communicationandlanguageskills√76.A-framesandcylinderblockisheldtogetherby_____toformarigidstructure√A．connectingrodsB．pistonrodsC．tierods√D．jack-bolts77.A-framesaremountedonthebedplateandsupport_____andcylinderblock√A．themainbearingB．thecylindercoverC．theentablature√支架D．thesumpalldrainsandindicatorcocksopened,andthecoolingwaterkeptrunning√A．steeringB．timingC．turning√D．running79.Afterensuringthatthe_____iscorrectthebearingclearanceshouldbechecked√A．napB．gapC．nip√D．deflection80.Afterfittingbackinplacethegearwheels,dontforget_____them√A．togrease√涂油B．greasingC．oilingD．lubricating81.Afterpassingthroughtheturbinetheexhaustgasisconductedoutintothe_____√A．intercoolerB．compressorC．cylinderD．openair√82.Aftertheengineiswarned,weshould_____theturninggearbeforestartinguptheengine√A．takeinB．putinC．takeout√D．putup83.Aftertheorder“_____”isgiven,theairsystemisshutdown,theturning第10页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库gearputin√A．FinishedwithEngine√B．StoptheEngineC．Stand-byEngineD．Slow-downEngine84.Aircocks,usuallypositionedatthe_____inacirculatingsystem,isusedtogetridoftheairinthesystem√A．bendingjointB．expansiontankC．weldD．thehighestpoint√85.Alltheringsareslightlyroundedontheirexternaltopandbottomedgestokeeptheoilfilmonthecylinderlinerduring_____fornewpistonrings√A．therunning-inperiod√磨合期B．therunningprocessC．gasexchangeprocessD．theboilerfiring86.Allthreesystemshavetheports_____toswirltheincomingairanddirectitintheappropriatepath√A．angledB．roundedC．beingangledD．beingrounded√87.Althoughthecrankshaftsofmediumdieselenginesappeartoberobust,theyrelyonthesupportof_____todeveloptheirfullstrength√A．thepistonrodsB．thecrankthrowsC．thethrustbearingsD．themainbearings√88.Aluminumpistonshave_____coefficientofthermalexpansioncomparedwiththoseofcastiron√A．higher√B．lowerC．thesameD．noneoftheabove89.Amongtheringsofapistonthe_____oneissubjectedtothegreatestloadandtemperature√A．bottomB．middleC．top√D．noneoftheabove90.Analuminumpistonhaslowerinertiaandhighercoefficientof_____comparedtothatofcastiron√A．viscosityB．twistingmomentsC．inertiaD．thermalexpansion√热膨胀91.Anelectricallydrivenautomaticallyoperatingauxiliaryblowerisprovided第11页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库forslowspeedand_____ofalowspeeddieselengine√A．manoeuvringoperations√机动运行B．badcombustionC．coolingD．mooringtrial92.Anincreaseinloadonadieselengineresultsin_____ofspeedofthecrankshaft√A．areduction√减少B．anincreaseC．anoutingD．adownwards93.Aninterlockintheremoteoperatingvalvelinestopsthevalve_____whentheengineturninggearisengaged√A．toopenB．opening√C．openD．opened94.Anoverspeedsafetydeviceisusuallyfittedtoageneratorenginefor_____intheeventofoverspeed√A．cuttingpowerofftheengine√B．increasingthefuelpumpsettingC．brakingthecrankshaftD．stabilizingtheshipspeed95.Asaheatengine,_____energyisthesourceofpowerbywhichthedieselenginecanbeoperated√A．electricB．heat√C．mechanicalD．exhaust96.Asforadieselengine,lackofcombustionairmaybedueto_____√A．foulingturbine√涡轮故障B．fuelpumpfaultsC．lubricationfailureD．excessivecooling97.Astheplungermovesup,theportsareclosedandthefuel_____anddeliveredtotheinjectornozzleatveryhighpressure√A．beingcompressedB．tobepumpedupC．ispressurized√D．arebuiltup98.Atleast_____cylindersinfour-strokeenginewillbeconfiguredtoensurethattheenginecanbestartedwiththecrankshaftatwhateverposition√A．6√B．2C．12D．899.AtthetopoftheA-framesthereisastrongcastironframecalled_____√A．cylinderliner第12页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库B．cylindercoverC．thegearboxD．thescavengingbox√100.Besuretomaketheengineturnby_____beforestartingandafterstopping√A．steeringgearB．turninggear√C．steeringwheelD．turningcycle101.Bearingknocksarelikelytooccurfrom_____√A．lessclearanceB．dirtylubeoilC．overloadD．bearingwear√102.Becausethecastingsofsmallerenginesarenotsobigandheavy,_____andcylinderblockmaybemadeinonepiece√A．thecolumn√B．thejacketC．cylindercoverD．cylinderliner103.Bedplatesarethe_____oftheengine,withoutthesupportofwhichtheshaftalignmentinparticular,andenginestructureasawhole,wouldinevitablybelost√A．hullB．projectionC．graphitizationD．foundation√基础104.Before"stand-by"isrungontheenginetelegraph,itisusualtogivethemainengine_____aheadandastern√A．abrieftrialwithturninggearB．abrieftrialonpower√C．alongtrialbysteeringgearD．oneminutestrialwithwindlass105.Beforeamarinedieselengineisstartedthecylindersandpistonsmustbe_____√A．cooledtoappropriatetemperatureB．warmedupgraduallytoappropriatetemperature√C．openedupandrenewedD．groundandpolished106.Beforebeingusedthefuelservicetankshouldbedrainedof_____√A．sodasolutionB．mechanicalimpuritiesC．ballastD．waterandresiduals√水和残渣107.Beforepumpingupthecrankcaseoil,_____shouldbeworkedbyhandtominimizecorrosiveactionontheliners√A．theindicatorsB．thestartingvalves第13页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库C．thecylinderlubricators√D．theturninggear108.Beforereplacingapistonyoushouldcheckthatallringsare_____√A．free√自由B．fastenedC．brokenD．stuck109.Beforereplacingapistonyoushouldchecktheringstoseethatallclearancesandgapsare_____thepermissibletolerances√A．aboveB．atC．overD．within√110.Beforereplacingapistonyoushouldchecktheringstoseethatallclearancesandgapsarewithinthepermissible_____√A．deflectionB．discrepancyC．errorD．tolerance√误差111.Beforestartingtheenginetheairbottleshouldbe_____√A．pumpedup√B．loadedC．dischargedD．opened112.Beforestartingtheturninggear,_____shouldbeworkedbyhandtominimizecorrosiveactionontheliners√A．theindicatorsB．thestartingvalvesC．thecylinderlubricators√D．theturninggear113.Blow-offofthereliefvalvesoftheenginescylindersmaybecausedby_____√A．toolowleadB．waterinfuelC．tootightspringD．leakage√泄漏114.Blow-offofthereliefvalvesofthemaincylindersduringoperationindicates_____√A．thecylindercoveriscrackedB．theinjectorholesiscloggedC．thecamsarenotproperlyset√D．fuelpumpisleaking115.Bridgegaugecanbeusedtomeasure_____ofadieselengine√A．diametersofjournals√轴颈直径B．deflectionsofcrankwebsC．diametersofcrankpinsD．noneoftheabove第14页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库116.Careandcleanlinessarerequiredwheninstallingdieselfuelfilters_____√A．topreventthefuelsystemfrombecomingair-houndB．topreventthefuelsystembecomingcloggedwithdirtyparticlesC．bothoftheabove√D．topreventthelubricatingoilfromleakingoutofthefilterelement117.Castironcarrierrings,_____machinedgrooves,areprovidedforallthepistons√A．caulkedinto√B．caulkingintoC．pressedintoD．screwedinto118.Chargingisthefillingoftheenginecylinderwithasupplyof_____forcompression√A．waterB．freshair√C．fueloilD．gas119.Chargingisthefillingoftheenginecylinderwithasupplyorchargeoffreshair_____compression√A．toneedB．readyfor√准备就绪C．wanttoD．goingtobe120.Charging-airpressureincreasesifthereisincorrectcombustionanddropinthe_____ofthedieselengine√A．machineefficiencyB．machineryefficiencyC．mechanicalefficiency√机械效率D．mechanicsefficiency121.Compressedairissuppliedbyaircompressionto_____√A．theairreceivers√B．thestartingvalvesC．thecylindercoversD．thedistributors122.Compressedairisusedonboardship_____√A．forstartingdieselenginesB．inpneumaticcontrolsystemC．inpneumatictoolsD．Alltheabovearetrue√123.Constantcoolingthevariouscomponentsofdieselenginehasanumberoffunctionsexceptfor_____√A．goodlubricationB．lowthermalstressC．goodmechanicalpropertiesD．acidcorrosion√酸腐蚀124.Coolingenablestheenginemetals_____theirmechanicalproperties√A．toretain√保留第15页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库B．toremainC．tomaintenanceD．tohave125.Coolingofengineisachievedbycirculationacoolingliquidaroundinternalpassageswithinthe_____√A．boilerB．heaterC．engine√D．cooler126.Coolingofenginesisachievedby_____acoolingliquidaroundinternalpassageswithintheengine√A．flowedB．flowingC．mixingD．circulating√循环127.Coolingofenginesisachievedbycirculatingacoolingliquidaroundinternal_____withintheengine√A．airB．passages√C．pipesD．means128.Cracksincylinderandcylindercoversmay_____fromunequalheating√A．makeB．causeC．result√导致D．produce129.Cracksinthecylindersandcylindercoversmay_____unequalheating√A．resultfrom√B．resultinC．giveoutD．givenfrom130.Cracksinthecylindersandcylindercoversmayresultfrom_____√A．lowspeedB．unequalheating√不均匀受热C．lesslubricatingD．lowchargeairpressure131.Crankshaftsofmediumspeedenginesare_____fromasinglepieceofsteel√A．unusuallysolidweldedB．neverbesolidforgedC．almostinvariablysolidforged√D．almostinvariablybewelded132.Crossscavengingrequiresthefittingof_____topreventairorexhaustgasescapewhenthepistonisatthetopofthestroke√A．aexhaustvalveB．apistonskirt√活塞裙C．apistoncrownD．anairsuctionvalve第16页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库133.Cylinderlinercoolingisoftenreferredtoas_____√A．pistoncoolingB．sleevecoolingC．centralcoolingD．jacketcooling√134.Cylindersofmarinedieselenginesarenormallycooledby_____√A．seawaterB．finemineraloilC．sanitarywaterD．freshwater√135.Dieselenginesarestartedbysupplying_____intothecylindersintheappropriatesequencefortherequireddirection√A．coolingwaterB．compressingairC．compressedair√D．cylinderoil136.Dieselenginesarestartedbysupplying_____intothecylindersintheappropriatesequencefortherequireddirection√A．fueloilB．dieseloilC．compressedair√D．jacketwater137.Dieseloilmaybeusedtocool_____ofadieselengine√A．cylindersB．exhaustvalvesC．pistonsD．fuelvalves√138.Dirtinthefueloilsystemofadieselenginecancause_____√A．cloggedfilters√堵塞滤器B．poorcombustionC．overloadingofthedieselD．shockoffuellines139.Dirtyoilmustbe_____beforebeingusedagain√A．mixedwithcleanoilB．purified√净化C．heatedD．strained140.Doorsaregenerallyformedinthe_____ofthebothin-lineandVeeenginestogivemaintenanceaccesstothecrankshaftmainandconnectingrodlargeendbearing√A．bedplatesB．columns√C．cylinderblocksD．safetycaps141.Dueto_____actionofpistonssomerelativemotionbetweenpartsincontactinthecoolantsupplyandreturnsystemmustoccur√A．reciprocating√往复第17页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库B．rotatingC．runningD．removing142.During_____,thestartingairvalvesshouldbeclosedtopreventtheenginefromturning√A．overhaul√大修B．runningC．blowingdownD．Alloftheabovearecorrect143.Duringrepair,lubricationlinesandorificesmustbe_____√A．takenawayB．engagedC．connectedD．sealedoff√打开144.Duringtheinspection,thestartingairvalvesshouldbeclosed_____theenginefromturning√A．toincreaseB．tospeedupC．toprevent√防止D．toreduce145.Duringthesuctionstroke,thepistonismoving_____√A．inwardsB．outwardsC．downwards√D．upwards146.Duringworking,whenthepistonisnearthe_____,theairignitesthefinesprayoffuel√A．TDC√B．DTCC．BDCD．BCD147.Eachcrankismadeupoftwocrankwebsjoinedbyacommon_____towhichthebottomendbearingisfitted√A．throwB．crankshaftC．crankpin√曲柄销D．crosshead148.Eachcylinderhasonestartingvalvewhichisusuallyopenedbyairpressureandclosedby_____√A．nutsandboltsB．newjointsC．springforce√弹簧力D．sealingrings149.Eachcylinderisclosedatthetopbya_____,madeofaspecialheat-resistantsteel√A．cylinderlinerB．couplingflangeC．cylindercover√第18页GeneratedbyFoxitPDFCreator©FoxitSoftware最新轮机英语题库D．pistoncrown150.Eachcylinderlineronthemarinemediumspeedengines_____√A．isusuallycooledbyseawaterB．canbereplacedwhenwornout√磨损可以更换C．isindirectcontactwiththewaterintheboreofthecylinderD．cantexpandwhenheated151.Eachjournalandpinshouldbeexaminedfor_____andgrooving√A．bridgesB．recessesC．rearsD．ridging√152.Eachpistonstuffingboxisprovidedwithtwosealingringsandthree_____√A．packingsB．pistonringsC．distributorringsD．scraperrings√刮油环153.Eitheralowinjectionpressureoraleakageofpistonringsisabletolead_____√A．ahighexhausttemperatureB．ahighsmokyexhaust√C．ahighoutputD．ahighcompression154.Emulsionoilsandsodiumnitritearebothapprovedadditives,butthelattercannotbeusedifanypipesare_____orifanysolderedjointsexit√A．chromedB．weldedC．galvanized√电镀D．bolted155.Emulsionoilsandsodiumnitritearebothapprovedadditives,but_____cannotbeusedifanypipesaregalvanizedorifsolderedjointsexist√A．thelatter√B．latterC．formerD．theform