关联题91篇注解版解析.docx
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关联题91篇注解版解析
6.关联题
Passage1
Valvedrivemechanism
Thevalvedrivemechanismcommandstheinletandexhaustvalvesattherequiredtiming.
第3题Thevalvedrivemechanismconsistsofaninletandexhaustcamfollower凸轮随动件(8)eachsuspendedin悬浮在…中aplungerofthetappetassembly挺杆组件(7),twotubularpushrods空心的推杆(4)withballjoints,twonodularcastiron球墨铸铁rockerarms摇臂
(2)suspendedinarockerarmbearingbracket,twoyokes吊梁(5)andayokeguidepins导销.SeeFig.4-1.
Thetappetrollers推杆滚柱followthecamprofilesandtransferthemovementsthroughpushrodstotherockerarms.第4题Therockerarmsoperatetheinletandexhaustvalvesthroughyokes(5).
Lubricationfortherockerarmscomesfromtheengine'ssecondaryoilsupplymanifoldthrough
drillingsinthecylinderheadandrockerarmbracket.
第2题Thetappetassemblyreceiveslubricatingoilviachannelsintheengineblockfromthemainsupplymanifold.Fortherollerandshaft,theoilissuppliedthroughtheguidingplunger.
第4题Tocompensateforheatexpansionaclearancemustexistbetweentherockerarmandyoke.第1题Alladjustmentshavetobedoneonacoldengineonly.
1.AccordingtothePassage,thebesttimetoadjustthevalveclearanceis_____.
A.beforetheengineisstartedB.whentheengineisrunning
C.aftertheenginehasjustbeenstoppedD.whensomethinghasgonewrongwiththeengine
注:
根据文章来看,调节阀间隙的最好时间是在发动机启动之前。
2.Therollerandthetappetassemblyarelubricatedbymeansof_____.
A.themainlubesystemB.thesecondaryoilsystem
C.thespecialpumpingsystemD.theturbineoilsystem
注:
滚轮和挺杆组件借助于主润滑系统润滑。
3.AccordingtothePassage,thevalvedrivemechanismdoesnotinclude_____.
A.tappetrollersB.pushrodsC.nodularcastironD.yokesandguidepins
注:
根据文章来看,阀驱动机构不包括球墨铸铁。
(包括杆滚轮、顶杆、吊梁和导销)
4.Toclosevalvestightly,whichclearanceshouldbeinspectedaccordingtothemaintenanceschedule?
A.Theonebetweenthecamandthetappetroller.
B.Theonebetweenthepushrodsandthebanjoints.
C.Theonebetweentherockerarmsandtheyoke
D.Theonebetweentwotubularpushrods.
注:
依据保养清单,要紧密的关闭阀件,应检查摇臂和吊梁之间的间隙。
AACC
Passage2
Chargeaircooler
Theengineisequippedwithachargeaircooler.Theinserttypechargeaircoolerismountedinaweldedcasing(airtrunk).Thetrunkisboltedtotheengineblock.
第1题Standardisatwo-stagecoolermounted.Thefirststage,throughwhichthechargeairflows,iscooledwithwaterfromtheHTcoolingsystemandcooksthechargeairtillapprox.90~100oC.ThesecondstageissuppliedwithwatercomingfromtheLTwatersystemandcooksthechargeairfurthertilltherequiredtemperatureofapprox.50oC.第2题(B)BycontrollingthewaterflowthroughtheLTcoolerthechargeairtemperaturecanbekeptconstantattherequiredtemperature.
Thecirculatingcoolantwatershouldalwaysbeunderpositivepressureandshouldbeascleanaspossible.Theoperatingairtemperatureshouldbemaintainedbycontrollingthecoolantinlettemperature.
Whilsttheengineisrunningtheairandcoolanttemperaturesandpressuresatinletandoutletshouldbecheckedandloggedperiodically.第3题Variationsfromnormalindicatefaultsdevelopingsuchasfoulingofthefilmplatesorobstructionofthewatertubes.
第4题Checkdaily,duringoperationoftheengine,theworkingofthetelltaleholeatthefreeendofthechargeairreceiver.Thefunctionofthisholeistoinformtheoperatorthepresenceofwaterinthechargeairreceiver.Undernormalconditiononlycompressedairshouldescapefromthishole.
1.AccordingtothePassage,theexpression"HT"probablymeans_____.
A.HIGHTANKB.HIGHTEMPERATUREC.HEATTRANSMISSIOND.HEATTRANSFER
注:
根据文章来看,"HT"的意思是:
hightemperature,高温。
2.Inordertomaintainthechangeairtemperatureweshouldcontrol_____.
A.thecoolantinlettemperaturecomingfromthefirststagecooler
B.thecoolantflowcomingfromthesecondstagecooler
C.thecoolantoutlettemperaturecomingfromthesecondstagecooler
D.thecoolantflowcomingfromtheflintstagecooler
注:
为维持增压空气的温度,我们应控制来自第二级冷却器的冷却剂流量。
3.Thechargeairtemperaturedepartingfromnormalmayindicatethat_____.
A.condensatecanbeformed
B.onlycompressedairshouldescapefromthetelltale
C.thefilmplatesarebecomingdirtyorthewatertubesareblockedbyscale
D.coolingwatermayhavebeencarriedintothecylinders
注:
增压空气温度偏离正常表明镀膜变脏或水管被水垢堵塞。
4.Thefunctionofthetelltaleholeisto_____.
A.detectwhethercompressedairhasescapedfromthehole
B.controlthecoolantinlettemperature
C.determinewhetherthecoolantwaterisunderpositivepressure
D.informtheoperatorthepresenceofwaterinthechargeairreceiver
注:
警报孔或监视孔的作用是同志作业员扫气箱中有水。
telltalehole监视孔,指示孔,警报孔;chargeairreceiver.扫气箱
BBCD
Passage3
Startingairsystem
Theengineisstartedwithcompressedairofmax30bar.Minimumpressurerequiredis15bar.ApressuretransmitterPI301mountedonthestartingairlinebeforethemainstartingvalvehasanindicatorintheinstrumentpanel.第3题Thesupplylinefromthestartingairbottlesisprovidedwithanonreturnvalveandadrainvalve.
Thesolenoidvalveiselectrical(remotecontrol)ormanual(ontheengine)operatedandsendafteractivationapilotairsignaltothemainstartingairvalve.Interruptionofthecontrolairdosesthemainstartingairvalve.
第1题(Afterthemainstartingairvalveisactivatedtheairflowsthroughtheflameattesterstothestartingairvalvesinthecylinderheads.Partoftheairflowsviathestartingairdistributortoeachofthestartingairvalvesinthecylinderheads.Thestartingairdistributorcontrolsthetimingofopeningandclosingofthestartingairvalves.
第2题Onthemomentthemainstartingairvalveisoperatedalsothegovernorboosterisenergized.)Themainstartingairlineisprovidedofasafetyvalve.第4题Interlockvalveisasafetydevicetoavoidanenginestartwithengagedturninggear.
1.Astheengineisstartedwithcompressedair,thecorrectsequenceofthefollowingdevicesbeingactivatedis_____.
(1)solenoidvalve;
(2)startingairvalve;(3)startingairdistributor;(4)mainstartingairvalve;(5)governorbooster.
A.
(1),(5),(4),
(2),(3)B.
(1),(4),(5),(3),
(2)C.
(1),(4),(3),
(2),(5)D.(4),(3),
(1),
(2),(5)
注:
从括号部分总结出,发动机由压缩空气启动时,装置被触发的顺序是:
电磁阀、主启动阀、调速器升压器、启动空气分配器、启动空气阀。
2.Thesentence"thegovernorboosterisenergized"(paragraph3)probablymeans_____.
A.thegovernorboosterissuppliedwithelectricpower
B.hydraulicoilispumpedintothegovernorbooster
C.thegovernorstartstoworkbeforestartingtheengine
D.thegovernorboosterissuppliedwithpressurizedairbeforestartingtheengine
注:
句子“调速器升压器被提供能量”大概意思是:
启动发动机之前,调速器升压器被提供增压空气。
3.Whichofthefollowingcomponentsareattachedtotheairbottles?
A.apressuretransmitterPT301B.anon-returnvalveandadrainvalve
C.asolenoidvalveD.astartingairdistributor
注:
答案应为B。
连到空气瓶的部件是:
止回阀和放残阀。
4.Whentheengineisengagedwithturninggear,_____cankeeptheenginefromstarting
A.thecontrolairB.thesolenoidvalveC.themainstartingairvalve
D.theinterlockvalve
注:
发动机由盘车机啮合时,连锁阀可防止发动机启动。
BDBD
Passage4
Startingairdistributor
第1题Thestartingairdistributorisofthepistontypewithprecisionmachinedinterchangeableliners.Thelinersaswellasthepilotpistonsareofcorrosionresistantmaterials.第3题Thepilotpistonsarecontrolledbyacamconnectedtothecamshaftend.Whenthemainstartingvalveopens,thepilotpistonsaxepressedontothecam,wherebythepilotpistonfortheenginecylinderwhichisinstartingpositionadmitscontrolairtothemainpistonofthestartingvalve.第2题Thestartingairvalveopensandadmitscompressedairintotheenginecylinderforcingthatpistondown.Shortlybeforetheexhaustvalvesareopenedthepilotvalveinterruptsthecontrolairtothestartingairvalveandstartingairtothatcylinderisstopped.Thisprocedurewillberepeatedaslongasthemainstartingvalveisactivatedoruntiltheenginespeedissohighthattheenginefires.Afterthemainstartingairvalveisclosed,themainstartingairsystemisde-aerated,thepressuredropsquicklyandthespringswillliftthepilotplungersoffthecam.Thismeansthatthepilotplungerstouchthecamonlyduringthestartingprocessandthuswearisinsignificant.
Ifapilotlineriswornout,pressitout.Itmaybenecessarytoheatthedistributoruptillabout
200oCasLoctiteisusedforfixingandsealing.
1.AccordingtothePassage,thelinersofthestartingairdistributor_____.
A.canbereplacedwhenwornoutB.aremadeofheatresistantmaterials
C.areweldedpreciselyD.arewornouteasilyduringthestartingprocess
注:
根据文章来看,启动空气分配器的衬套磨坏时,可更换。
changeable可更换的
2.Duringthestartingprocess,when_____,themainstartingairvalveisclosed.
A.theexhaustvalvesinthestartingcylinderareopened
B.thepilotairtothestartingairvalveisstopped
C.theenginespeedreachesfirespeed
D.thepilotpistonsarepressedontothecam
注:
启动过程中,当发动机转速达到发火转速时,主启动空气阀关闭。
3.Whensomecylinderoftheengineadmitscompressedairintoit,thepilotpistonofthestartingairdistributorshouldbe_____
A.separatedfromthecamB.pressedontothecam
C.liftedoffthecamD.pressedontothecamrepeatedly
注:
当部分汽缸允许压缩空气进入时,启动空气分配器的先导活塞被压到凸轮上。
4.FromthePassageweknowthat"Loctite"isprobably_____
A.atypeofgasketB.akindoflubricantC.agluebondD.ananti-corrosionadditive
注:
从文章当中我们了解到,"Loctite"可能是一种粘合剂。
gluebond;粘合剂
ACBC
Passage5
Theengine'ssupportingelementconsistsofabedplateandframe.Thebedplatecanbeofweldedoreastdesign.第4题(A)Theframeismadeofcastiron.第2题Theturbochargermounting,thehousingf