轮机英语试题2007

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.entirelyconstantpressureB.entirelyconstanttemperatureC.acombinationofconstantvolumeandconstantpressureD.acombinationofconstanttemperatureandconstantpressure2.TheaveragepressureexertedonapistonduringeachpowerstrokeistermedA.indicatedhorsepowerB.meaneffectivepressureC.exhaustbackpressureD.compressionpressure3.Anindividualinjectionpumpisdesignedforvariablebeginningandconstantendingofinjection.Fordieselenginesoperatingatconstantspeeds,thestartofinjectionwillA.advanceastheloadincreasesB.retardastheloadincreasesC.remainunchangedregardlessofloadD.alwaysoccurattopdeadcenter4.Onoppositeendsofasingleshaftofaturbo-blowerareagasdrivenandaaircompressor,whicharesealedeachother.A.chargeairreceiverB.scavengingairbeltC.turbineD.aircooler5.Theadverseeffectsofburninghighsulfurfuelcanbecompensatedforbyusingcylinderoilhavingsufficient____.A.dispersantadditivesB.flocpointC.alkalinityadditivesD.ignitionquality6.Tocheckthesettingoftheover-speedtriponadiesel-poweredgenerator,youwouldusea.A.torsionmeterB.tachometerC.dynamometerD.ponybrake7.Thebesttooltouseforremovingthecarbonridgeatthetopofanenginecylinder,priortoremovingthepiston,istouse.A.anelectricgrinderB.ametalscraperC.areamerD.athree-winghome8.Faultyoperationofdieselenginefuelinjectionnozzlescanbeadirectcauseof.A.excessivefuelnozzleholdercoolingB.sedimentinthefuelsupplyC.distortionofthefuelspraypatternD.improperatomizationofthefuel9.Earlyfuelinjectiontimingisindicatedbythecylinderpressurebeing.A.abovenormalwithabelownormalexhausttemperatureB.abovenormalwithanormalexhausttemperatureC.belownormalwithanormalexhausttemperatureD.belownormalwithanabovenormalexhausttemperature10.Whichofthefollowingadjustmentsisalwaysrequiredwheneverthedieselenginegovernoroilhasbeendrainedandrenewed'?A.SpeeddroopB.CompensationC.IdlespeedsettingD.Loadlimitcontrol11.Excessivelubricatingoilconsumptioninarunningdieselenginecanbecausedby__.A.cloggedlubeoilpipingB.excessivevalve-guideclearanceC.highlubeoilviscosityD.lowlubeoiltemperature12.Onceatrunkingfireisdetectedtheengineshouldbesloweddown,Onnoaccount__.A.thetrunkingshouldbeopenedupB.shouldthetrunkingbeopenedupC.thetrunkingshouldnotbeopenedupD.shouldthetrunkingnotbeopened13.___onashiptransmitspowerfromtheenginetothepropeller.A.TheautomaticcontrolsystemB.ThespeedregularlysystemC.ThetransmissionsystemD.Thecompressionairsystem14.Dieselenginestartingdifficultiesduetocoldintakeairtemperaturescanbeovercomebyusinga/an.A.increaseinstartingairpressureB.increaseinlubeoilviscosityC.compressionexpansiondeviceD.jacketwaterheater15.Pittedreductiongearteethhavingadeepbluecolorwithevidenceofoverheatinghavebeenoperatedwith.A.excessivespeedB.improperwarm-upC.fuelpumpfailureD.inadequatelubrication16.Impropermaintenanceofthefueloilburnersinanautomaticallyfiredauxiliaryboiler,couldresultin.A.increasedfuelconsumptionB.increasedfeed-waterconsumptionC.fuelpumpfailureD.combustioncontrolsystemfailure17.Blacksmokecomingfromaboilercanbeusuallycausedby.A.lowwaterlevelB.lowoilpressureC.excessivelyhighfuelpressureD.animproperair/fuelratio18.Somepumpsusepackingassealinggland.Theglandshouldbe.A.slackenoughtoallowslightleakageoffluidB.slightlyblockedC.broughtuptightsoasnottoallowanyleakageD.fittedwithareliefvalve19.Itispossibletomountadoublesuctioncentrifugalpumpimpellerwiththevanesfacinginthewrongdirection.Thiswouldcausethepump.A.headcapacitytoimproveB.dischargetobereversedC.efficiencytodecreaseD.slippagetodecrease20.Theheatgainedperpoundofrefrigerantintheevaporatorisknownasthe.A.latentheatofvaporizationB.sensibleheatC.refrigeratingeffectD.specificheatofvaporization21.Whichofthefollowingbestdescribesoverchargeofrefrigerant?A.toomuchrefrigerantB.toolittlerefrigerantC.refrigerantisranoutD.runningisover22.Crankcasesweatinginarefrigerationsystemiscausedby__A.astucksolenoidvalveB.ashortageofrefrigerantC.toomuchoilincirculationD.toomuchsuperheat23.Whichoftheprocesseslistedwouldbethemostsatisfactorymethodtousetolowerthehumidityoftheairbeingcirculatedbyanairconditioningsystem?A.Coolingtheairtoatemperaturejustabovedewpoint.B.Heatingtheairtoapointatwhichmoisturewillboiloff,thenre-coolingit.C.Coolingtheairtoapointbelowdewpoint,thenreheatingit.D.Heatingtheairandthencoolingittoapointbelowdewpoint24.Placingafilteronthebywaterseparatorwillpolishthedischargebutoverloadingmustbeavoided.A.suctionsideB.dischargesideC.by-passpipeD.samplingpipe25.Whichisthepollutionpreventionequipment?A.boosterpumpB.evaporatorC.incineratorD.cooler26.Insewagetreatment,theterm'maceration'referstotheprocessof.A.breakingupsolidmatterintofineparticlesB.precipitatingnon-decomposedwasteinacollectionC.chemicallyadjustingthesewagepHto7.0D.eliminatingbacteriumcolifromthesewage27.Thesizeofthedischargeringusedfortheefficientope