《汽车发动机构造（双语课程）》习题（按项目列出）

项目一任务一发动机总体构造及安全操作规程Item1Task1Useofcommontoolsandmeasuringtoolsforautomobileengines一.判断题（对“√”，错“×”）（41题）Ⅰ.Trueorfalsequestions（True“√”,false“×”）（41questions）1.汽车的动力源是起动机。（）1.Thepowersourceofthecaristhestarter.()2.活塞环包括气环和水环两种。（）2.Pistonringincludestwokindsofgasringandwaterring.()3.曲柄连杆机构由机体组、活塞连杆组和曲轴飞轮组等三部分构成。（）3.Thecrankconnectingrodmechanismiscomposedofthreeparts:bodygroup,pistonconnectingrodgroupandcrankshaftflywheelgroup.()4.四冲程发动机的工作循环包括四个活塞行程，即进气、作功、和排气。（）4.Theworkingcycleofafour-strokeengineconsistsoffourpistonstrokes,namely,intake,work,andexhaust.()5.在安装气环时，各个气环的切口应该错位。（）5.Wheninstallinggasrings,thecutsofeachgasringshouldbemisaligned.()6.气门式配气机构由气门组和气门起动组组成。（）6.Thevalvevalvemechanismiscomposedofavalvegroupandavalvestartinggroup.()7.气门弹簧座是通过安装在气门杆尾部的凹槽或圆孔中的锁片或锁销固定的。（）7.Thevalvespringseatisfixedbyalockpieceorlockpininstalledinthegrooveorroundholeattheendofthevalverod.()8.强制冷却水在发动机内进行循环的装置是水泵。（）8.Thedevicethatforcesthecoolingwatertocirculateintheengineisthepump.()9.发动机的曲柄连杆机构采用压强润滑和飞溅润滑相结合的润滑方式。（）9.Thecrankconnectingrodmechanismoftheengineadoptsthelubricationmethodcombiningpressurelubricationandsplashlubrication.()10.机油泵常见的结构形式有齿轮式和转子式机油泵。（）10.Thecommonstructureofoilpumpisgeartypeandrotortypeoilpump.()11.活塞环有“三隙”：间隙、背隙和端隙。（）11.Thepistonringhas"threegaps":clearance,backclearanceandendclearance.()12.一般水冷式发动机的冷却水温最佳范围为25—35℃。（）12.Thebestrangeofcoolingwatertemperatureofgeneralwater-cooledengineis25-35℃.()13.曲轴变形，主要是指曲轴的弯曲变形。（）13.Crankshaftdeformation,mainlyreferstothebendingdeformationofthecrankshaft.()14.将油箱中的燃油吸出来并送到燃油分配管中的元件是活塞。（）14.Theelementthatsucksthefueloutofthetankandsendsittothefueldistributionpipeisthepiston.()15.检查曲轴的弯曲度，一般是检查曲轴的圆跳动量。（）15.Checkthecurvatureofthecrankshaft,generallycheckthecircularrunoutofthecrankshaft.()16.汽油机常见的燃烧室形状有盘形球形两种类型。（）Thecommoncombustionchambershapeofgasolineenginehastwotypesofdiscshapeandballshape.()17.曲轴的裂纹多发生在曲轴臂与轴柄颈之间的过渡圆角处及油孔处。（）17.Thecracksofcrankshaftmostlyoccuratthetransitioncornersandoilholesbetweenthecrankshaftarmandtheshafthandleneck.()18.气缸磨损程度的技术状祝是发动机是否需进行总成修理的决定性标志。（）Thetechnicalindicationofthedegreeofcylinderwearisadecisiveindicatorofwhethertheengineisinneedofassemblyrepair.()19.活塞的最大磨损部位一般是群部。（）Thelargestwearpartofthepistonisgenerallygrouppart.()20.活塞销与活塞销座孔及连杆小头的连接方式有全浮式和沉浸式两种。（）20.Thepistonpinandthepistonpinseatholeandtheconnectingrodsmallheadareconnectedintwoways:fullfloatingandimmersion.()21.非增压发动机在进气结束时，气缸内压力小于外界大气压。（）21.Attheendofintake,thepressureinthecylinderislessthantheexternalatmosphericpressure.()22.发动机在排气结束时，气缸内压力小于外界大气压。（）22.Attheendoftheexhaustoftheengine,thepressureinthecylinderislessthantheoutsideatmosphericpressure.()23.点火系统将低压变为高压是由点火线圈和断电器共同完成的。（）23.Theignitionsystemchangesthelowpressureintohighpressurebytheignitioncoilandthebreaker.()24.曲轴正时齿轮是由凸轮轴正时齿轮驱动的。（）24.Thecrankshafttiminggearisdrivenbythecamshafttiminggear.()25.离心式点火提前装置是在发动机负荷一定,发动机转速发生变化时起作用,真空式点火提前机构是发动机转速一定,负荷发生变化时起作用（）25.Centrifugalignitionadvancedeviceworkswhentheengineloadisfixedandtheenginespeedchanges,andvacuumignitionadvancemechanismworkswhentheenginespeedisfixedandtheloadchanges()26.压缩比等于气缸工作容积与燃烧室容积的比值。（）26.Thecompressionratioisequaltotheratiooftheworkingvolumeofthecylindertothevolumeofthecombustionchamber.()27.为防止缸盖变形,拧紧缸盖螺栓的步骤是先中间、后四周,一次性按规定力矩拧紧。（）27.Topreventdeformationofthecylinderhead,thestepsfortighteningthecylinderheadboltsaretostartinthemiddleandthenaround,andtightenatonceaccordingtothespecifiedtorque.28.蜡式节温器失效后无法修复,应按照其安全寿命定期更换。（）28.Thewaxthermostatcannotberepairedafterfailureandshouldbereplacedregularlyaccordingtoitssafelife.()29.曲杆连柄机构是在高温、高压以及有化学腐蚀的条件下工作的。（）29.Thecrankandhandlemechanismworksunderhightemperature,highpressureandchemicalcorrosion.()30.气门间隙是指气门与气门座之间的间隙。（）30.Thevalveclearancereferstotheclearancebetweenthevalveandthevalveseat.()31.凸轮轴的转速比曲轴的转速快一倍。（）31.Thespeedofthecamshaftistwicethatofthecrankshaft.()32.过量空气系数越大,则可燃混合气的浓度越浓。（）32.Thegreatertheexcessaircoefficient,thegreatertheconcentrationofthecombustiblemixture.()33.蜡式节温器失效后,发动机易出现过热现象。（）33.Afterthewaxthermostatfails,theengineispronetooverheating.()34.汽车举升机可按照形状、功能及占用空间的不同进行分类。（）34.Carliftmachinecanbeclassifiedaccordingtoshape,functionandoccupyspace.()35.剪式汽车举升机操作前即使车内的行李物品重量很轻，也需将其搬出车外。（）35.Beforetheoperationofthescissorcarliftmachine,eveniftheluggageinthecarisverylight,itneedstobemovedoutofthecar.()36.剪式汽车举升机下降操作时，直接按下“下降”按钮即可完成下降操作。（）36.Whenthescissorcarliftmachineisdescending,thedescendingoperationcanbecompletedbypressingthe'down'buttondirectly.()37.清洁就是清扫。（）37.Cleaningissweeping.()38.修理汽油箱前，应用专用溶液或水清除油箱内的残余油气。但在清洗时不得吸烟，不得在旁边烘烤零件或点燃喷灯。（）38.Beforerepairingthegasolinetank,applyspecialsolutionorwatertoremovetheresidualoilandgasinthetank.Butdonotsmokewhilecleaning,donotbakethepartsorlighttheblowtorchnexttoit.()39.蓄电池应轻搬轻放，不可歪斜，以防电解液泼出腐蚀人体皮肤和衣服。（）39.Thebatteryshouldbecarriedlightlyandnottiltedtopreventtheelectrolytefromspillingoutandcorrodinghumanskinandclothes.()40.6S是指整理、整顿、清扫、清洁、素养、防护。（）40.6Sreferstofinishing,rectification,sweeping,cleaning,literacy,protection.()41.维修工具可以在实际工作中混用。（）41.Maintenancetoolscanbemixedinpracticalwork.()二.单选题（34题）Ⅱ.Multiplechoicequestions(Selectonlyoneanswerchoice)（34questions）1.发动机工作时，曲轴的正时齿轮带动下列哪一个部件工作（）1.Whentheengineisworking,thetiminggearofthecrankshaftdriveswhichofthefollowingpartstowork()A.进排气凸轮轴B.飞轮C.喷油器D.节气门A.IntakeandexhaustcamshaftB.FlywheelC.InjectorD.Throttlevalve2.在某些发动机凸轮轴盖上有时会标有DOHC，那么DOHC是表示（）。2.DOHCissometimesmarkedonthecamshaftcoverofsomeengines,soDOHCstandsfor().A.单顶置凸轮轴B.双顶置凸轮轴C.新型电喷发动机D.缸内喷射A.SingleoverheadcamshaftB.DoubleoverheadcamshaftC.NewtypeofelectronicfuelinjectionengineD.In-cylinderinjection3.学生a说：在齿轮传动中，斜齿轮比正齿轮啮合更为平稳，噪声更小；学生b说：在拆装发动机的时候，配气机构的拆装要观察原机体上有没有正时记号，没有的话要认真做好记号，备装配的时候用。下列说法正确的是（）3.Studentasaid:ingeartransmission,thehelicalgearmeshesmoresmoothlyandmakeslessnoisethanthespurgear;Studentbsaid:whendisassemblingtheengine,thedisassemblyandassemblyofthevalvemechanismshouldobservewhetherthereisatimingmarkontheoriginalbody,ifnot,itshouldbecarefullymadeamarkforassembly.Thefollowingstatementiscorrect()A.只有学生a正确B.只有学生b正确C.学生a和b都正确D.两个都错误A.Onlystudentaiscorrect B.OnlystudentBiscorrect C.Bothstudentsaandbarecorrect D.Botharewrong4.在电控发动机的供油系统中，油压调节器的作用是（）。4.Intheoilsupplysystemoftheelectronicallycontrolledengine,thefunctionoftheoilpressureregulatoris().A.控制燃油分配管中的压力恒定A.ControltheconstantpressureinthefueldistributionpipeB.在节气门开度大时燃油压力变小B.Whenthethrottleopeningislarge,thefuelpressurebecomessmaller.C.燃油压力与进气管压力之差保持恒定C.ThedifferencebetweenthefuelpressureandtheintakepipepressureremainsconstantD.进气管压力大时燃油压力小D.Whentheintakepipepressureislarge,thefuelpressureissmall5.现代汽车发动机普遍采用多气门结构，其作用是为了（）5.Modernautomobileenginesgenerallyusemulti-valvestructure,itsroleisto()A.提高点火性能B.提高喷油性能C.减小爆震D.提高充气效率A.ImproveignitionperformanceB.improvefuelinjectionperformanceC.reduceknockD.Improveinflationefficiency6.发动机温度过热时，以下哪个描述是错误的？（）6.Whichofthefollowingstatementsisfalsewhentheenginetemperatureisoverheated?()A.将使发动机熄火困难A.willmakeitdifficulttostalltheengineB.将使汽油机爆燃或早燃B.willmakethegasolineenginedeflaggingorearlyignitionC.将使汽油机容易熄火C.willmakethegasolineengineeasytostallD.将使发动机经济性变好D.willmaketheenginemoreeconomical7.正常工作的发动机，其机油泵的限压阀应该是（）7.Thenormaloperationoftheengine,theoilpumppressurelimitingvalveshouldbe()A.经常处于关闭状态A.OftenintheclosedstateB.热机时开，冷机时关B.Whentheheatengineison,thecoldmachineisoffC.经常处于溢流状态C.OftenintheoverflowstateD.热机时关、冷机时开D.Whentheheatengineisoff,thecoldmachineison8.从各缸的进、排气凸轮轴的排列，我们可以判断出发动机的（）8.Fromthearrangementoftheinletandexhaustcamshaftofeachcylinder,wecanjudgethe()ofthestartingmotor.A.转速B.工作顺序C.气门的迟闭角D.气门的提前角A.SpeedB.WorkingsequenceC.LateclosingangleofthevalveD.Advanceangleofthevalve9.学生a说：气门弹簧折断时，将会影响发动机的工作，严重时会造成事故；学生b说：气门弹簧折断时，进排气门可以开启得更快，增加进排气量。下列说法正确的是（）9.Studentasaid:Whenthevalvespringisbroken,itwillaffecttheworkoftheengineandcauseaccidentsinseriouscases;Studentbsaid:Whenthevalvespringisbroken,theintakeandexhaustvalvescanbeopenedfastertoincreasetheintakeandexhaustvolume.Thefollowingstatementiscorrect()A.只有学生a正确B.只有学生b正确C.学生a和b都正确D.两个都错误A.Onlystudentaiscorrect B.OnlystudentBiscorrect C.Bothstudentsaandbarecorrect D.Botharewrong10.曲轴每旋转两圈，凸轮轴将旋转多少圈（）10.Howmanyrevolutionswillthecamshaftrotateforeverytworevolutionsofthecrankshaft?A.两圈 B.一圈C.三圈D.半圈A.Twoturns B.Oneturn C.Threeturns D.Halfacircle11.发动机零件最主要的耗损形式是（）11.Themostimportantformofenginepartswearis().磨损 .腐蚀 .疲劳 .变形 B.corrosion C.fatigue D.deformation12.现代高级轿车多采用了液压挺柱，我们将无需调整（）12.Modernluxurycarsmostlyusehydraulictappets,wewillnotneedtoadjust()A.点火顺序 B.火花塞间隙 C.喷油量 D.气门间隙A.ignitionsequence B.sparkplugclearance C.fuelinjectionquantityD.valveclearance13.学生a说：活塞从上止点开始至进气门完全关闭的曲轴转角叫进气迟后角；学生b说：从排气门打开至下止点所转过的曲轴转角叫排气提前角。下列说法正确的是（）13.Studentasaid:Thepistonangleofthecrankshaftfromtopdeadcentertotheintakevalvecompletelyclosediscalledtheintakelaterearangle;Studentbsaid:ThecrankshaftAnglerotatedfromtheopeningoftheexhaustvalvetothebottomdeadcenteriscalledtheexhaustadvanceangle.Thefollowingstatementiscorrect()A.只有学生a正确B.只有学生b正确C.学生a和b都正确D.两个都错误A.Onlystudentaiscorrect B.Onlystudentbiscorrect C.Bothstudentsaandbarecorrect D.Botharewrong14.学生a说：由于进、排气门的早开和迟闭，就会有一段时间内进、排气门同时开启的现象，这种现象称为气门重叠，重叠的曲轴转角称为气门重叠角；学生b说：我们设置适宜的气门重叠角，可以利用气流压差和惯性对燃烧室进行扫气，清除残余废气，增加新鲜空气充量。下列说法正确的是（）14.Studentasaid:Duetotheearlyopeningandlateclosingoftheintakeandexhaustvalves,therewillbeaperiodoftimewhentheintakeandexhaustvalvesareopenedatthesametime.Thisphenomenoniscalledvalveoverlap,andtheoverlappingcrankshaftangleiscalledvalveoverlapangle;Studentbsaid:Wesetanappropriatevalveoverlapangle,whichcanmakeuseofairflowpressuredifferenceandinertiatosweepthecombustionchamber,removeresidualExhaustgas,andincreasefreshaircharge.Thefollowingstatementiscorrect()A.只有学生a正确B.只有学生b正确C.学生a和b都正确D.两个都错误A.Onlystudentaiscorrect B.Onlystudentbiscorrect C.Bothstudentsaandbarecorrect D.Botharewrong15.（）会引起发动机的上、下、左、右振动。15.()willcausetheupper,lower,leftandrightvibrationsoftheengine..气体作用力.离心力.往复惯性力.摩擦力Frictionforce16.排气门的锥角一般为（）16.Theconeangleoftheexhaustvalveisgenerally()A．30°B．45°C．60°D．50°17.气压检验法检测气门密封性时，储气筒内气压值，在0.5分钟内气压值降低至少不大于（），说明气门密封性良好。17.Whenthevalvesealingisdetectedbythepressuretestmethod,thepressurevalueinthegasstoragecylinderisreducedbyatleastnotmorethan()within0.5minutes,indicatingthatthevalvesealingisgood.A.10%B.15%C.20%D.25%18.下述各零件不属于气门驱动组的是（）。18.Thefollowingpartdonotbelongtothevalvedrivegroupisthe().A.正时链条B.凸轮轴正时齿轮C.曲轴正时齿轮D.凸轮轴A.timingchain B.camshafttiminggear C.crankshafttiminggear D.camshaft19.发动机气缸磨损的检验，主要测量其（）19.Enginecylinderweartest,mainlymeasureits().直线度和同轴度.平行度和平面度parallelismandplanarity.垂直度和圆跳动.圆度和圆柱度Roundnessandcylindricity20.凸轮轴上凸轮的轮廓的形状决定于（）。20.TheshapeofthecontouroftheCAMonthecamshaftisdeterminedby().A.气门的升程B.气门的运动规律C.气门的密封状况D.气门的磨损规AvalveliftB.valvemotionlawC.valvesealstatusD.weargaugeforvalve21.活塞与气缸壁之间的润滑方式是（）。.压力润滑.飞溅润滑.脂润滑.压力润滑和飞溅润滑同时进行pressurelubricationandsplashlubricationareperformedsimultaneously22.机油粗滤器上装有旁通阀，当滤芯堵塞时，旁通阀打开（）。22.Thecrudeoilfilterisequippedwithabypassvalve.Whenthefilterelementisblocked,thebypassvalveopensto.使机油不经过滤芯，直接流回油底壳A.allowtheoiltoflowdirectlybacktotheoilpanwithoutpassingthroughthefilterelement.使机油直接进入细滤器B.allowtheoiltodirectlyenterthefinefilter.使机油直接进入主油道C.allowtheoildirectlyentryintothemainoilpassage.使机油流回机油泵D.allowoiltoflowbackintotheoilpump23.（）是汽车的动力装置？23.()isthepowerplantofthecar?.车身.底盘.电器设备.发动机24.发动机气门间隙过大会造成气门脚异响,可用（）来进行测量气门间隙。24.Theenginevalveclearanceistoolargetocausethevalvefootabnormalsound,()canbeusedtomeasurethevalveclearance..扳手.卡尺.厚薄规 D.外径千分尺 D.outermicrometer25.进、排气门在排气上止点时（）。25.Whentheintakeandexhaustvalvesareattheexhausttopdeadcenter().A.进气门开,排气门关B.排气门开,进气门关A.Intakevalveopen,exhaustvalveclosedB.Exhaustvalveopen,intakevalveclosedC.排气门全关D.进、排气门开C.Exhaustvalvesareclosed.D.Intakeandexhaustvalvesareopened26.四冲程发动机的有效行程是指（）。26.Theeffectivestrokeofafour-strokeenginerefersto().A.压缩行程B.作功行程C.排气行程D.进气行程。A.compressionstrokeB.workstrokeC.exhauststrokeD.intakestroke.27.下述各零件不属于气门传动组的是（）。27.Thefollowingpartdonotbelongtothevalvedrivegroupis().A.气门弹簧B.挺柱C.摇臂轴D.凸轮轴A.valvespringB.tappet C.rockerarmshaft D.camshaft28.发动机的压缩比是指（）之比。28.Thecompressionratiooftheenginereferstotheratioof().A.气缸总容积与燃烧室容积A.TotalcylindervolumeandcombustionchambervolumeB.气缸工作容积与燃烧室容积B.CylinderworkingvolumeandcombustionchambervolumeC.发动机排量与燃烧室容积C.EnginedisplacementandcombustionchambervolumeD.气缸总容积与气缸工作容积D.Totalcylindervolumeandcylinderworkingvolume29.发动机中,活塞与连杆之间的活塞销主要起（）。29.Intheengine,thepistonpinbetweenthepistonandtheconnectingrodismainlyraised().A.定位作用B.过载保护作用C.联接作用D.防松作用A.positioningfunctionB.overloadprotectionfunctionC.connectionfunctionD.Anti-looseningaction30.发动机的气缸壁采用（）。30.Thecylinderwalloftheengineadopts().A.润滑脂润滑B.压力润滑C.飞溅润滑D.其它润滑A.GreaselubricationB.pressurelubricationC.splashlubricationD.Otherlubrication31.进气门晚关的目的是（）。31.Thepurposeofclosingtheintakevalvelateisto().A.充分利用气流的惯性,增加进气量A.makefulluseoftheinertiaoftheairflowtoincreasetheintakevolumeB.减少进气阻力B.reducetheintakeresistanceC.排气更容易C.makeexhausteasierD.减少进气量D.reducetheintakevolume32.下面哪项不属于气门传动组（）。32.Whichofthefollowingdoesnotbelongtothevalvedrivegroup()?A.凸轮轴B.挺柱C.摇臂D.气门导管A.camshaftB.tappetC.rockerarmD.valveguide33.燃烧室由（）共同组成。33.Thecombustionchamberconsistsof()together.A.汽缸盖汽缸壁活塞顶部B.汽缸盖活塞顶部进气总管A.cylinderheadcylinderwallpistontopB.cylinderheadpistontopintakemanifoldC.汽缸壁活塞顶部进气总管D.汽缸盖汽缸壁进气总管C.cylinderwallpistontopairintakemainD.cylinderheadcylinderwallairintakemain34.发动机零件最主要的耗损形式是（）。34.Themostcommontypeofenginepartswearoutis().A.磨损B.腐蚀C.疲劳D.变形A.wearB.corrosionC.fatigueD.deformation

项目二任务一气缸压力测试Item2Task1Cylinderpressuretest一.判断题（对“√”，错“×”）（25题）Ⅰ.Trueorfalsequestions（True“√”,false“×”）（25questions）1.对置式和V形气缸体与气缸数相同的直列气缸体相比，高度降低，长度缩短，但宽度增大。（）1.Comparedwithin-linecylinderswiththesamenumberofcylinders,theheightoftheopposedandV-shapedcylinderblockisreduced,thelengthisshortened,butthewidthisincreased.()2.平分式曲轴箱多用于大中型发动机上。（）2.Bisectorcrankcaseismostlyusedforlargeandmedium-sizedengines.()3.隧道式曲轴箱其强度和刚度最高，但工艺性差，只用于少数机械负荷较大、采用组合式曲轴的发动机。（）3.Thetunnelcrankcasehasthehigheststrengthandstiffness,buttheprocessispoor,anditisonlyusedforafewengineswithlargemechanicalloadandcombinedcrankshaft.()4.气缸体下平面位于曲轴中心线以下的为平分式曲轴箱。（）4.Thelowerplaneofthecylinderblockislocatedbelowthecenterlineofthecrankshaftforthebisectingcrankcase.()5.风冷式发动机气缸体和气缸盖内设有充水空腔。（）5.Theair-cooledenginecylinderblockandcylinderheadareprovidedwithawater-filledcavity.()6.干式气缸套不与冷却水接触，冷却效果较差，壁厚一般为5～9mm。（）6.Drycylinderlinerdoesnotcontactwithcoolingwater,thecoolingeffectispoor,thewallthicknessisgenerally5~9mm.()7.为了保证水套的密封，干式气缸套下端的密封带与座孔之间一般装有1～3道橡胶密封圈，有的在定位凸缘下面还装有铜垫片。（）7.Inordertoensurethesealingofthewaterjacket,thesealingbeltatthelowerendofthedrycylinderlinerandtheseatholearegenerallyequippedwith1to3rubbersealingrings,andsomearealsoequippedwithcoppergasketsunderthepositioningflange.()8.除了一些小型发动机外，在大、中型的发动机内一般镶有气缸套。（）8.Inadditiontosomesmallengines,largeandmedium-sizedenginesaregenerallyinlaidwithcylinderliner.()9.湿式气缸套安装后，一般其顶端高出气缸体上平面0.05～0.15mm，以便气缸盖将气缸垫压得更紧，从而提高气缸的密封性。（）9.Aftertheinstallationofthewetcylinderliner,thetopisgenerally0.05~0.15mmhigherthantheupperplaneofthecylinderblock,sothatthecylinderheadwillpressthecylindergasketmoretightly,therebyimprovingthesealingofthecylinder.()10.（）10.Thedamagedcylindergasketcanberepaired.()11.（）11.Thecommonfailureofthecylindergasketistheablationbreakdown,whichisgenerallyaroundthewaterholeorthecombustionchamberhole.()12.（）12.wearisserious,itwillleadtoairleakageandoilchanneling,whichwillreducetheenginepowerandeconomy.()13.（）13.Thecombustiblemixtureinthecylinderwillgeneratecarbonoxides,sulfuroxides,andnitrogenoxidesaftercombustion.Theseoxidesdirectlyinteractwiththecylinderwallandcausemechanicalwear.14.腐蚀磨损的强度取决于气缸壁的温度，冷却效率较强，这些部位的腐蚀磨损就严重。（）14.Thestrengthofcorrosionweardependsonthetemperatureofcylinderwall.Thecoolingefficiencyisstrong,andthecorrosionwearofthesepartsisserious.()15.温度过低时，不仅机械磨损加剧，氧化腐蚀磨损也会剧增。（）15.()16.（）16.()17.机械磨损的最大部位发生在活塞位于下止点时，第一道环的顶边上。（）17.ThegreatestmechanicalwearoccursonthetopedgeofthefirstringwhenthepistonisatBDC.()18.（）18.Theseriousthewearofthecylinderandthepistonring.()19.润滑油越脏，含有的磨料越多，引起的磨损就越严重。（）19.Thedirtierthelubricatingoil,themoreabrasiveitcontains,themoreseriousthewearcaused.()20.硬度低的磨料会在气缸内表面产生平行于气缸轴线的拉痕。（）20.Abrasiveswithlowhardnesswillproducetensionmarksparalleltothecylinderaxisontheinnersurfaceofthecylinder.()21.一旦发生，气缸的工作面会遭到严重的破坏，甚至报废。（）occurs,theworkingfaceofthecylinderwillbeseriouslydamagedorevenscrapped.()22.往往缸盖变形较大，缸体变形较小。（）22.Oftenthecylinderheaddeformationislarger,thecylinderbodydeformationissmaller.()23.气缸修理尺寸=气缸最大磨损直径+镗磨余量（镗磨余量一般取0.10～0.20mm。（）23.Cylinderrepairsize=maximumweardiameterofcylinder+boringallowance(boringallowanceisgenerally0.10~0.20mm.()24.无修理尺寸的气缸，或气缸虽有修理尺寸，但其磨损后的尺寸已接近或超过最后一级修理尺寸时，即无法修理了。（）24.Norepairsizeofthecylinder,oralthoughthecylinderhasarepairsize,butitssizeafterwearhasapproachedorexceededthelastlevelofrepairsize,thatis,cannotberepaired.()25.更换气缸套时，需拆旧换新和对承孔加工。（）25.Whenreplacingthecylinderliner,itisnecessarytoremovetheoldandreplacethenewandprocessthebore.()二.单选题（10题）Ⅱ.Multiplechoicequestions(Selectonlyoneanswerchoice)（10questions）1.主轴承座孔为整体式的曲轴箱是（）。1.Acrankcasewithanintegralmainbearingseatholeis().A．平分式曲轴箱 B.龙门式曲轴箱 C.隧道式曲轴箱A.bisectorcrankcase B.gantrycrankcase C.tunnelcrankcase2.气缸体、气缸盖裂纹的检查，在条件许可时，应使用（）的热水进行试验。2.Checkthecylinderblockandcylinderheadcracks.Whenconditionspermit,thehotwaterof()shouldbeusedfortest.A.70~80℃B.80～90℃C.90~100℃3.水压试验的要求是：在0.3～0.4MPa水压下，保持（），应没有任何渗漏现象。3.Therequirementsofwaterpressuretestare:under0.3~0.4MPawaterpressure,maintain(),thereshouldbenoleakagephenomenon.A.3minB.4minC.5min4.气缸体、气缸盖裂纹的修理，刮削坡口附近表面氧化层和铁锈，并用（）清洗，洗净表面并使其干燥。4.Repairthecylinderblockandcylinderheadcracks,scrapethesurfaceoxidationlayerandrustnearthegroove,andcleanwith(),washthesurfaceanddryit.A．丙酮 B.盐酸 C.稀硫酸A.Acetone B.HydrochloricacidC.Dilutesulfuricacid5.灰口铸铁件的焊修，一般是在不预热或预热低于（）的情况下焊接。5.Graycastironweldingrepair,generallyinthecaseofnopreheatingorpreheatingbelow()welding.A.200℃B.300℃C.400℃6.对铸铁气缸体采用焊条电弧焊修复前，应清洁焊接表面，并在裂纹发展走向前方距裂纹终点约（）处钻止裂孔，以防止裂纹延伸。6.Beforethecastironcylinderisrepairedbyweldingrodarcwelding,theweldingsurfaceshouldbecleanedandthecrackstopholeshouldbedrilledatabout()infrontofthecrackdevelopmentandawayfromthecrackendpointtopreventthecrackfromextending.A.1～3mmB.3～5mmC.5～7mm7.每个缸体顶面每次修磨的尺寸限度应小于（）。7.Thesizelimitofeachgrindingofthetopsurfaceofeachcylinderblockshouldbelessthan().A.0.15mmB.0.25mmC.0.35mm8.进行气缸镗磨修理时，一般最后一刀的进刀量不超过（）。8.Whencylinderboringandgrindingrepair,generallythefeedamountofthelastknifedoesnotexceed().A.0.05mmB.0.10mmC.0.15mm9.（）9.Theboringsizeofthecylindershouldbesmallerthanthefinalcylinderdiametersizetobeachieved,inordertoleaveahoningallowance,generallynotmorethan().气缸珩磨时，应严格控制珩磨头的转速和往复速度，以保证获得理想的网纹夹角，夹角为（）。A.30°～40°B.50°～60°C.70～80三.多选题（5题）Ⅲ.Multiple-choicequestions(Selectmorethanoneanswerchoices)（5questions）1.以下哪些原因会造成（）1.Whichofthefollowingcauseswillcausethecylindergasketablationbreakdown?()（）B.（）A.磨料磨损B.黏着磨损C.机械磨损D.A.abrasivewearB.adhesivewearC.mechanicalwearD.corrosivewear4.铸铁气缸体采用气焊修复时，当焊接厚度在（）以上时，应开V形坡口，如图2-12所示。若焊接厚度在15mm以上，应开（）形坡口。4.Whenthecastironcylinderblockisrepairedbygaswelding,whentheweldingthicknessisabove(),V-shapedgrooveshouldbeopened,asshowninFigure2-12.Iftheweldingthicknessisabove15mm,the()shapegrooveshouldbeopened.A.6mmB.10mmC.XD.YE.Z5.气缸体、气缸盖裂纹的修理方式（）。5.Repairmethodofcylinderblockandcylinderheadcrack().A.堵漏剂堵漏 B.焊修C.环氧树脂胶黏接D.镶套修理E.钳工修理A.pluggingagentplugging B.weldingrepair C.epoxyresinbonding D.insertrepair E.fitterrepair

项目二任务二机体组检修Item2Task2Airframeoverhaul一.判断题（对“√”，错“×”）（10题）Ⅰ.Trueorfalsequestions（True“√”,false“×”）（10questions）1.汽车机体组是指汽车的发动机、底盘和车身等部分。（）1.Theautomobilebodygroupreferstotheengine,chassisandbodyoftheautomobile.()2.发动机是汽车机体组的核心部件，它能够将热能转化为机械能。（）2.Theengineisthecorecomponentoftheautomobilebody,whichcanconvertheatenergyintomechanicalenergy.()3.汽车机体组中的润滑系统能够为发动机内部零件提供润滑作用。（）3.Thelubricationsystemintheautomobilebodygroupcanprovidelubricationfortheinternalpartsoftheengine.()4.汽车机体组中的冷却系统能够将发动机的热量传递给外界空气。（）4.Thecoolingsysteminthecarbodygroupcantransfertheheatoftheenginetotheoutsideair.()5.汽车机体组中的点火系统能够为发动机的点火过程提供低压电。（）5.Theignitionsysteminthevehiclebodygroupcanprovidelow-voltageelectricityfortheignitionprocessoftheengine.()6.汽车机体组中的燃料供给系统只为发动机提供汽油混合物。（）6.Thefuelsupplysysteminthevehiclebodygroupsuppliesonlythegasolinemixturetotheengine.()7.汽车机体组中的曲柄连杆机构是实现发动机曲轴旋转的关键部件。（）7.Thecrankconnectingrodmechanismintheautomobilebodygroupisthekeycomponenttorealizetherotationoftheenginecrankshaft.()8.汽车机体组中的配气机构能够控制发动机的进气和排气过程。（）8.Thevalvemechanismintheautomobilebodygroupcancontroltheintakeandexhaustprocessoftheengine.()9.汽车机体组检修时，应该重点关注发动机的性能表现和运行状况。（）9.Whenthevehiclebodygroupisoverhauling,itshouldfocusontheperformanceandoperationoftheengine.()10.汽车机体组中的故障诊断和维修方便性是检修过程中的重要考虑因素。（）10.Faultdiagnosisandmaintenanceconvenienceinthevehiclebodygroupareimportantconsiderationsinthemaintenanceprocess.()二.单选题（9题）Ⅱ.Multiplechoicequestions(Selectonlyoneanswerchoice)（9questions）1.以下哪个部件是汽车机体组的一部分？（）1.Whichofthefollowingpartsispartofacarbodygroup?()A.轮胎 B.发动机 C.悬挂系统 D.刹车系统A.Tires B.Engine C.Suspensionsystem D.Brakesystem2.发动机按燃烧方式可以分为哪几种？（）2.Whatkindsofenginescanbedividedintoaccordingtothecombustionmode?()A.电喷和直喷 B.柴油机和汽油机A.EFIanddirectinjectionB.DieselandgasolineenginesC.点燃式和压燃式 D.四冲程和两冲程C.Ignitionandcompressioncombustion D.Four-strokeandtwo-stroke3.汽车机体组的主要功能是什么？（）3.Whatarethemainfunctionsofthebodygroup?()A.储存能源 B.传递动力C.过滤和净化液体D.支撑和保护汽车内部部件A.StoreenergyB.TransferpowerC.FilterandpurifytheliquidD.Supportandprotecttheinternalpartsofthecar4.汽车机体组由哪些主要部件组成？（）4.Whatarethemaincomponentsofacarbodygroup?()A.曲柄连杆机构、配气机构、燃料供给系统、点火系统、润滑系统、冷却系统、启动系统A.Crankconnectingrodmechanism,valvemechanism,fuelsupplysystem,ignitionsystem,lubricationsystem,coolingsystem,startingsystemB.车轮、轮胎、悬挂系统、刹车系统、车身、座椅B.Wheels,tires,suspensionsystem,brakesystem,body,seatsC.电瓶、发电机、调节器、点火线圈、火花塞C.Battery,generator,regulator,ignitioncoil,sparkplugD.离合器、变速器、万向传动装置、主减速器和差速器D.Clutch,transmission,universaldrive,mainreduceranddifferential5.在汽车机体组检修中，常用的检修方法是什么？（）5.Whatisthecommonlyusedmaintenancemethodinthemaintenanceof