高级汽车修理工试卷（senior auto mechanic paper ）

《高级汽车修理工试卷（senior auto mechanic paper ）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、高级汽车修理工试卷5（Seniorautomechanicpaper5）1.Selectthecorrectanswer,andfillinthecorrespondinglettersinbrackets.1.Intheactualcycle,theprocessofreplacingtheidealcyclewiththeheatandheatprocessis().(A)ventilationprocess(B)airintakeprocess(C)exhaustprocess(D)compressionprocess2

2、.Reasonablydeterminethepurposeofthedistributionphaseisto().(A)toincreasetheamountofairintake(B)toexhausttheexhaustgas(C)AandB(D)improveengineeconomy3.Inordertoimprovetheaerationcoefficient,theresistanceoftheintakesystemshouldbereduced,inthewholeintakesystem,theminim

3、umofthecrosssectionofthe()andtheconstantchangeoftheflowresistanceshouldbeconsideredfirst.(A)intakevalve(B)carburetor(C)inletpipe(D)airfilter4.TheoptimumignitionadvanceAngleincreaseswiththespeedofrotation().(A)increase(B)constant(C)decrease(D)decreasefirstandthenincr

4、ease5.Whentheengineisworking,iftheignitionswitchiscutoff,theenginecanstillbeonfire,whichmaybecausedby().(A)surfaceignition(B)detonation(C)highvoltage(D)mixtureistoothick6.Inthecombustionprocess,thehighesttemperatureformationpointis().(A)ignitionperiod(B)(C)delayedco

5、mbustionperiod(D)7.Oneofthemainreasonsfordieselengineexhaustblacksmokeis().(A)theinjectiontimeistooearly(B)theinjectiontimeistoolate(C)theamountoffuelinjectionistoosmall(D)8.Theeffectiveindicatorforevaluatingengineeconomyistheeffectivefuelconsumptionrateand().(A)eff

6、ectivepower(B)effectivethermalefficiency(C)effectivetorque(D)effectivepressure9.Thecarengineshouldbekeptunder()anditstorqueandpowerarebothlargeandlowinfuelconsumption.(A)highspeed(B)mediumspeed(C)low-speed(D)10.Whichofthefollowingstatementsiscorrectaccordingtothepre

7、angleadjustmentcharacteristicsoftheignition?(A)theoptimumignitionadvanceAngleincreaseswiththeincreaseofrotationalspeed(B)theoptimumignitionadvanceAngledecreaseswiththeincreaseoftherotationalspeed(C)theoptimalignitionadvanceAngleincreaseswiththeloadand(D)theoptimumig

8、nitionadvanceAngledecreaseswithloadThemoregearboxes,themorelikelytheenginewillbecloserto()whentheengineiscloserto().(A)maximumtorque(D)max