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1、高级汽车修理工试卷4One,choicequestion(1~60.Thequantityofthegasstateparameteris().(A)internalenergy(B)energy(C)heat(D)pressureInthetheoreticalcycleofheatmixing,iftheratioofcompressiontothetotalquantityofheatisdetermined,ifthepressureishigherthantheincrease,theheatefficiency
2、().(A)thechange(B)becomeslow(C)low(D)beforeitbecomeslowTheenginecompressionratioincreases,theinflatablefactor().(A)increases(B)decreases(C)invariant(D)decreasesafterfirstenlargement4.Inordertoimprovethefillingcoefficient,shouldreducetheresistanceoftheairintakesyst
3、em,andtheairintakesystem,the()throughthecrosssectionoftheyoungest,andconstantlychanging,itsmaximumflowresistance,shouldfirstconsider.The(A)carburetor(B)entersthevalve(C)inletpipe(D)airfilter5.Intheprocessofthenormalcombustionofgasolineengine,()isthemainstageofcomb
4、ustionprocess,thestandorfallofthisstagearedirectlyaffectthepowerandthethermalefficiencyoftheengine.(A)inductionperiod(B)reignationperiod(D)inductionperiodandreigniteperiodThebestignitionAngleincreaseswiththespeedofrotation().(A)decreases(B)invariant(C)increases(D)
5、firstdecreasesThecombustionofapetrolengineisapttohappen().(A)high-loadoperatingcondition(B)loadcondition(C)atlowspeedandlowloadcondition(C)Themainpurposeofallformsofdieselcombustionchamberistocontrol().(A)theheatarea(B)ofthecombustionchamber(B)isAcertaincompressio
6、nratio(C)thetemperatureandpressureinthecombustionchamberoftheappropriateeddyandoilfilm(D)9.Inthecombustionprocessofdieselengine,fromthefirsttoproduceflamecenterrapidburningmixtureinthecylinder,thepressureinsidethecylinderreachesthehighestbetweencrankshaftAngle,isc
7、alled().(A)ignitionperiod(B)period(C)period(C)DuetotheflatchangeoftheMecurveoftheenginespeedcharacteristic,itispossibletoproduce()whenthegovernorfailureissuddenlyunloaded.(A)theexplosion(B)surfaceignition(C)isArough(D)accidentIntheloadcharacteristicofthepetrolengi
8、ne,theengineconsumesthefuelperhour.(A)theignitiontiming(B)enginespeed(C)carburetoradjustment(D)excessaircoefficientThegroundpowerofcarbrakingdependsfirs
