轮机英语47期大证试题

1中华人民共和国海事局2009年第1期海船船员适任统考试题（总第47期）科目：轮机英语试卷代号：805适用对象：无限/近洋航区3000KW及以上船舶二/三管轮（本试卷卷面总分100分，及格分70分，考试时间100分钟）答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑，第1题至88题，每题1分，第89题至96题，每题1.5分。一、单项选择题1.The__A__engineisusedforalternatorsandsometimesformainpropulsionwithagearboxprovideapropellerofbetween90to120rpm.A.four-strokeB.Two-strokeC.SlowspeedD.reversible2.TheabbreviationMIPstandfor___B__.A.middleindicatingpressureB.meanindicatedpressureC.MeanindicatedpitchD.Middleindicatedpower3.Thecetanenumberofadieselfueloilindicatesits_D____.A.ViscosityB.AcidcontentC.HeatingvalueD.ignitionquality4.Inatwo-strokeenginethecamshaftrotatesat__C__theenginerotationalspeed.A.HalfB.twiceC.ThesamespeedasD.Fourtimes5.Adieselengineissimilartoagasolineengineexceptthattheformerhasno_D____.A.Cross-headB.CylinderC.ConnectingrodD.sparkplug6.Itiseasiertoreplaceadrycylinderlinerthanawetonebecause____C__.A.OfthethinwallthicknessB.honingmakesiteasiertomaintainthedesiredoilfilmC.WatersealsarenotrequiredD.Itfitsmorelooselyduetoadecreaseinheattransferthroughthecompositewall7.Amainbearingconsistsoftwoshellswhicharesecuredbymeansofstudsand___D__.A.TierodsB.ThroughboltsC.LeadwiresD.Bearingcaps8.Howeverfastorslowthecombustionrate,itisstilla__C___betweencarbon,hydrogen,sulphandoxygenthatreleasesheat.A.PhysicaldeformationB.StateexchangeC.ChemicalreactionD.Coalescence9.Duringthefuelinjectionperiod,fuelpressuremustexceedcylindergaspressureto____A_.A.EnsurepenetrationanddistributionofthefuelinthecombustionchamberB.EnsuretheneedlevalveisflushedcleanduringeachinjectionC.PreventcombustiongasblowbackintotheopenneedlevalveD.Preventreflectedpressurewaveswhentheneedlevalvecloses10.Inadieselenginelubeoilsystem,whichofthefollowingpartsshouldbelubricatedfirst?BA.CamshaftbearingB.MainbearingC.PistoncrownsD.Cylinderwalls11.Inadieselengineclosedfreshwatercoolingsystem,theamountofcoolantflowingthroughtheheatexchangeriscontrolledbythe___B___.A.SuctionpressureregulatorB.ThermostaticbypassvalveC.SeawatertemperatureD.Waterlevelintheexpansiontank12.whichofthedieselenginecomponentlistedincreasesairdensityandhelpstoimproveengineoperatingefficiency?CA.impellerB.AirbottleC.AircoolerD.Exhaustdiffuser13.alargetwo-stroke/cycledirectreversingdieselengineistobereversed.Priortotheadmissionofstartingairyoumust_____C_.A.lineuptheengineforrestartingwithlightdieseloilB.RepositionthefuelinjectioncamC.ChangetheintakeandexhaustvalvecampositionsD.Placethestartingcamintheintermediateposition14.Whichofthelistedgovernorcharacteristicswillgreatlyaffecttheloadsharingrelationshipbetweenparalleleddieselgenerators?CA.SensitivityB.PowerC.SpeeddroopD.Compensation15.Thermocouplepyrometersareusedonlarge,mainpropulsiondieselenginestoindicatethetemperatureofthe____C__.A.CoolingwaterleavingeachcylinderB.FueloilenteringtheinjectorC.ExhaustgasesatvariouslocationsD.Lubeoilatthebearingsupplies16.Afterstartingadieselengine,whichofthelistedoperatingconditionsshouldbecheckedfirst?BA.AirboxpressureB.LubeoilpressureC.ExhausttemperaturesD.rawwaterpressure17.Toshutdownadieselengineafteritexceedsthesetmaximumspeed,whichtypeofdevicelistedshouldbeused?DA.SpeedlimitinggovernorB.Over-speedgovernorC.Over-speedtripD.Over-speedrelay18.Thetreatmentofthefueloilsinvolvesstorage,heating,filteringand___C__.A.CentrifugingB.PressurizingC.AtomizationD.Igniting19.Apropeller,inordertooperateefficiently,mustrotateatarelatively__D____speed.A.HighB.LowC.FastD.lowly20.Latentheatchangesthe_A__ofwater.A.physicalstateB.TemperatureC.AtmosphericpressureD.Sensiblepressure21.Theprimaryfunctionofaflamesafeguardsystem,asusedonanautomaticallyfiredauxiliaryboiler,istoprevent_____C.A.AccidentaldryfiringandoverpressureB.UncontrolledfiresinthefurnaceC.ExplosionsintheboilerfurnaceD.Overheatingofthepressureparts22.Impropermaintenanceofthefueloilburnersinanautomaticallyfiredauxiliaryboilercouldresultin_______.A.increasedfuelconsumptionB.Increasedfeed-waterconsumptionC.FuelpumpfailureD.Combustioncontrolsystemfailure23.Burnerignitionfailureinanautomaticallyfiredauxiliaryboilerwouldbecausedby______.2A.AburnedoutsolenoidintheoilsupplyvalveB.HightemperatureexcessairC.Incorrectlysettingthehot-welldumpvalveD.Anincorrectlypositionedburnersnubberrelay24.ifthefeedpumpforanauxiliaryboilerfailstodeliverthefeedwatertotheboiler,thecausemaybe______.A.HighsteampressureintheboilerB.Abnormallyhighfeed-watertemperatureC.AbnormallyhighboilerwatertemperatureD.Steamdemandexceedingfeedpumpcapacity25.Gearpumpsareofpositivedisplacementtypepumpsbecausetheydischargeanearconstantamountofliquid______pressure.A.DependingonB.InrelativetoC.RegardlessofD.becauseof26.Aspurgearpumpshouldbeoperatedwiththedischargevalves______.A.SlightlyopenedB.ThrottledC.FullyopenedD.Halfwayopened27.Anindependentbilgesuctionisrequiredfor________.A.BallasttanksB.SludgetanksC.MachineryspacebilgesD.Cargoholdbilges28.Tothoroughlypumpoutthebilgesusingahorizontallymountedcentrifugalpump,the_______.A.PumpmustalwaysbeprimedB.VolutemustimpartaradialandrotarymotionofthewaterC.Suctionsideconnectionmustguidetheliquidtothe