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1、维修电工职业技能鉴定试题（Maintenanceelectricianvocationalskillappraisalquestion）Maintenanceelectricianoccupationskillappraisalquestion(attachedanswer)Author:Source:easyCNCnetworkupdatetime:200803,08Maintenanceelectricianqualificationtestpaper-SeniorTechnicianFillintheblanks(pleasefillintheblanksinthebla
2、nks,1centsperspace,15questions,30points)1.CNCmachinetoolservosystemgenerallyincludes_____and_____.2.SIN840Ccontrolunitcomprisesadisplaypart,_____,_____input/outputdevicesand_____.3.inverterspeedcontrolsystemtoimprove_____equipmentperformance,reducetheconsumptionof_____.4.CIMSfunctionmainlyin
3、cludes_____function,engineeringdesignautomation,manufacturingautomationand_____.5.intheautomaticcontrolsystem,thesystemcanchange_____withcertainaccuracyandfollow_____changesisknownasaservosystem.6.phasehalfwavecontrolledrectifierwithresistanceload,eachthyristorconductionangleformaximum______
4、___,thetriggerdelayangleshiftrangeis__________.7.nostaticerrorregulatorprincipleis_________.Nostaticerrorcontrolsystemmusthave__________regulator.The8.CNCsystemis_____referredtoasCNCsystemby______tomeetavarietyofdifferenttypesofmachinetoolrequirements.9.inordertoimprovethereliabilityoftheope
5、rationoftheelectricalequipment,the_____and_____toconnectthegroundcallwork.The10.principlediagramofelectriccontroldesignaccordingtothemaincircuit,_____,_____,generalinspectionorder.11.differenceprincipleisthestartingpointoftheknowncoordinatesofthetrajectoriesandendpointcoordinatedatasystem___
6、__byreal-timecalculatingthecoordinatesof_____.12.changeandmotorrotationdirection,generallyused_____;changeseriesmotorrotationdirection,generallyused_____.13.DCmotorundertheratedloadoperation,thecommutationsparkshouldnotexceed_____.TheprovisionsofthestatefivesparkgradeDCmotor,_____levelisnosp
7、ark.14.workinordertomaintainthesafetyofpersonnelandequipment,currenttransformerinoperation,notwoside______,whenthecurrenttablemustberemovedfromthecurrenttransformerusedon,shouldfirstbetwosidetransformerreliably______,thentheinstrumentconnectingline
