中级汽车修理工试题(含答案)（intermediate auto mechanics test (including answers)）

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1、中级汽车修理工试题2(含答案)（Intermediateautomechanicstest2(includinganswers)）Nationalvocationalqualificationexamination-intermediateautomechanicssimulationexam2Theredansweristhecorrectanswer,1.Thebrandofhigh-qualitycarbonstructuralsteelisrepresentedbytwoNumbers,indicatingtheaveragecarboncontentofsteel(

2、).Perseveral2.Inthefollowingmaterials,thequalitycarbonstructuralsteelis().40Inthefollowingmaterials,theenginecrankshaftisused().454,T8Abelongsto().Carbontoolsteel5.Excessiveviscosityofengineoilwillcause().Theengineishardtostart6.40Crisakindoftemperedsteel,whichisusedtomakethepumpshaft,andth

3、efinalheattreatmentmethodis()forgoodcomprehensivemechanicalproperties.Quench+hightemperaturetemperingComparedwithsteel,theoutstandingfeatureofcastirontechnologyis().GoodcastabilityThefunctionof()istopassthethrustofthecamshafttothepushrod.lifter9.Thecombustiblemixtureformingdeviceofgasolinee

4、ngineis().carburetor10.Theidlejetholeofthecarburetorisatthethrottle().below11.Thefunctionofthevalveistosupportandclosethevalveandclosethevalveandpreventthevalvefrombeating.ValvespringsInthefollowingoptions,()theengine'sairsupplyunit.Airfilter13.Thefunctionoftheputteristopassthroughthethrust

5、fromthecamshaft.Rockerarm14.Thefunctionof()istoensurethattheengineisprovidedwithasmallandconcentratedmixtureinidleorsmallloadconditions.Idlespeeddevice15.Within()range.?15.Whentheengineiscoldstart-up,thesupplyofextremelythickmixtureisrequiredforexcessiveaircoefficient0.2~0.6Takegasolineouto

6、fthetankandintothefloatchamberofthecarburetor.ThepetrolpumpThemixinggasformingdeviceofdieselengineis().Thecombustionchamber18.Thefunctionofthecranklinkagemechanismistotransformtheforceofthecombustiongasatthetopofthepistontothetorqueof(),andthemechanicalenergycanbeexportedthroughthecrankshaf

7、t.ThecrankshaftInthefollowingoptions,()alow-pressureoilroadsupplydevicefordieselengines.OiltransferpumpThecombustionchamberiscompact,lowheatlossandhighthermalefficiency.Theunifiedstyle21.Thedeviceisusedtopreventautomatictransmissionofautomobiletransmissi