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1、高级汽车修理工试卷3（Seniorautoengineer3）First,multiple-choicequestions(first~60questions).Choosethecorrectanswerandputthecorrespondinglettersintothebracketsinthequestions.1pointsforeachquestion.60points!):1.thevaluemeasuredbyapressuremeterisgas.(A)absolutepressure(B),pressure(C),vacuum(D)
2、,atmosphericpressure;2.inthetheoryofmixedheatingcycle,suchasthecompressionratioandthetotalheatingquantity,thethermalefficiencyishigherifthepressureriseratioisincreased().(A)higher(B),lower(C)constant(D),firsthigher,thenlower3.,increase()canincreasethecoefficientofinflation.(A)int
3、akeendpressure(B),endofairtemperature(C),exhaustendpressure(D),exhausttemperature;4.attheendoftheintakeprocess,thepressureinthecylinderisalways().(A)greaterthanatmosphericpressure(B),equaltoatmosphericpressure(C),independentofatmosphericpressure(D),lessthanatmosphericpressure5.wh
4、ichofthefollowingconcentrationsmakesthecombustionmorecompleteandthefuelconsumptionratelowest(?).(A)alpha=0.85to0.95(B),alpha=1.05to1.15(C),alpha=1(D),alpha<0.85to0.956.whichofthefollowingmixturesofgaseshasthefastestburningrate?.(A)alpha=0.85to0.95(B)alpha,=1.05to1.15(C),alpha=1(D
5、),alpha<0.85~0.957.,gasolineenginesarepronetodetonationcombustion.(A)highspeedheavyload(B),lowspeedsmallload(C),lowspeedheavyload(D),mediumspeedandsmallloadconditionThe8.dieselenginecombustionchamberismadeofvariousshapesforthepurposeofcontrolling(mainly).(A)thecombustionchamberhe
6、atdissipationarea(B),thepropereddycurrentandtheoilfilm(C)certaincompressionratio(D)temperatureandpressureinthecombustionchamber9.()theformationandcombustionofmixedgasatthesametimehasthecharacteristicsofspaceandoilfilmcombustion,soitisalsocalledcompoundcombustionchamber.(A)opencom
7、bustionchambers(B),semisplitcombustionchambers(C),sphericalcombustionchambers(D),Utypecombustionchambers10.gasolineenginetorquereservecoefficient(diesel)torquereservefactor,soitdoesnotneedtochangetheuseoflow-end,toovercomethepotentialofresistance(A)lessthan(B)greaterthan(C)equalt
8、o(D)first,greaterthanlater,lessthan11.,t
