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1、低压电工考试习题1带答案（Lowvoltageelectricalexaminationexercises1withanswers）1,specialoperationspersonnelmustbetrainedbyspecializedsafetytechnologyandqualifiedassessment,obtained"People'sRepublicofChinaspecialoperationcertificate",beforethejob.(1points,1points)yesno2,specialoperationspersonnel
2、shouldaccepttheirspecialoperationscorrespondingtothetechnicaltrainingofsafetytechnologyandtechnicaltraining.(1points,1points)yesno3.Employeeswhodonotwearanduselaborprotectionarticlesaccordingtoregulationsshallnotbeallowedtoworkonduty.(1points,1points)yesno4,noninsulatedsafetyequipme
3、ntincludingtheuseofelectricalmaintenanceoftemporarygroundingline,obscurationandsignage,gogglesetc..(1points,1points)yesno5,highvoltageinspectionmustwearinsulatinggloves,outdoorinspectionmustalsowearinsulationboots.(1points,1points)yesno6.Thehumanbodytouchingthechargedbodyiscalledind
4、irectcontactwithelectricshock.(1points,0points)yesno7,suchaselectricshockcasualtyconscious,shouldbeobservedintheventilationwarmrepose,temporarilydon'twalk.(1points,1points)yesno8,withthelossoflowvoltagecircuitbreakervoltagereleasecoilafterlossofpressure,thecircuitbreakerfailstoclose
5、.(1points,1points)yesno9.Undernocircumstancesshallthereplacementfusebecarriedwithload.(1points,1points)yesno10.Theratedcurrentofthefuseshallnotexceedtheratedcurrentoffusemelt.(1points,0points)yesno11.Thelinevoltageisthevoltagebetweenthephaselineandthecenterline.(1points,1points)yesn
6、o12,thedirectionofpositivechargeisthepositivedirectionofcurrent.(1points,1points)yesno13,thephenomenonofselfinductanceandmutualinductancebelongstodifferentformsofelectromagneticinduction.(1points,1points)yesno14,three-phasepowersupplysystemwithneutrallineiscalledthree-phasefourwires
7、ystem,itiscommonlyusedinlow-voltagedistributionsystem.(1points,1points)yesno15.Thethyristor'sturn-onconditionisthethyristorplusforwardvoltagegateplusreversevoltage.(1points,0points)yesno16,multimeterohmmetercannotlivemeasurement.(1points,1points)yesno17,whentheshuntcapacitorcasehass
8、eriousexpansiondefo
