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1、中级汽车修理工试题2(含答案)（Intermediateautorepairquestions2(includinganswers)）Nationalvocationalqualificationexamination-Intermediateautomotiveengineersimulationquestions2Theredanswerrepresentsthecorrectreferenceanswer,1,thequalityofcarbonstructuralsteelismarkedbytwofigures,whichmeansthatt
2、heaveragecarboncontentofsteel.Athousandtimesamillion2,thefollowingmaterials,belongingtothequalityofcarbonstructuralsteelis().Forty3,thefollowingmaterialsusedtomaketheenginecrankshaftis().Forty-five4andT8Abelongto().Carbontoolsteel5,theenginelubricatingoilviscosityistoolarge,will
3、cause().Enginecoldstartdifficult6,40Crisakindofquenchedandtemperedsteel,usedtomakepumpshaft,inordertoobtaingoodcomprehensivemechanicalproperties,itsfinalheattreatmentmethodis().Quenching+hightemperaturetempering7.Comparedwithsteel,theoutstandingcharacteristicofcastironis().Goodc
4、astingabilityThefunctionof8()istotransferthethrustofthecamshafttothepushrod.Tappet9.Thecombustiblegasmixtureformingdeviceofthegasolineengineis().Carburetor10,carburetoridlejetorificeatthrottle().BelowThe11()functionistosupportandclosethevalveandclosethevalvetopreventthevalvefrom
5、beatingandcausingthecylindertoleak.Valvespring12,thefollowingoptions,()belongtotheengineairsupplydevice.Airfilter13.Thefunctionofthepushrodistotransferthethrustfromthecamshaftthroughthetappet.rockerarm14,()thefunctionistoensurethattheengineinidleorverysmallloadconditionsforthesu
6、pplyoflessdensemixture.Idledevice15,within()range.15.Whentheengineiscoldactivated,averystrongmixtureissupplied.Excessiveairfactorisrequired0.2to0.616.Thegasolineissuckedoutofthetankandsentintothefloatchamberofthecarburetor.Gasolinepump17.Themixinggasformingdeviceofdieselengineis
7、().combustionchamber18.Thefunctionofthecrankconnectingrodmechanismistochangetheforceofthecombustiongasactingonthetopofthepistoninto()torque,andtooutputmechanicalenergythroughthecrankshaft.crankshaft19,thefollowingoptions,()belongstothedieselenginelowpressurecircuitsupplydevice.O
8、ilpump20,thecombustionchamberhastheadvantagesof
