维修电工职业技能鉴定试题Maintenance electrician vocational skill appraisal question.docx

维修电工职业技能鉴定试题Maintenance electrician vocational skill appraisal question.docx

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维修电工职业技能鉴定试题Maintenanceelectricianvocationalskillappraisalquestion

维修电工职业技能鉴定试题（Maintenanceelectricianvocationalskillappraisalquestion）

Maintenanceelectricianoccupationskillappraisalquestion（attachedanswer）

Author:

Source:

easyCNCnetworkupdatetime:

200803,08

Maintenanceelectricianqualificationtestpaper-SeniorTechnician

Fillintheblanks（pleasefillintheblanksintheblanks,1centsperspace,15questions,30points）

1.CNCmachinetoolservosystemgenerallyincludes_____and_____.

2.SIN840Ccontrolunitcomprisesadisplaypart,_____,_____input/outputdevicesand_____.

3.inverterspeedcontrolsystemtoimprove_____equipmentperformance,reducetheconsumptionof_____.

4.CIMSfunctionmainlyincludes_____function,engineeringdesignautomation,manufacturingautomationand_____.

5.intheautomaticcontrolsystem,thesystemcanchange_____withcertainaccuracyandfollow_____changesisknownasaservosystem.

6.phasehalfwavecontrolledrectifierwithresistanceload,eachthyristorconductionangleformaximum_________,thetriggerdelayangleshiftrangeis__________.

7.nostaticerrorregulatorprincipleis_________.Nostaticerrorcontrolsystemmusthave__________regulator.

The8.CNCsystemis_____referredtoasCNCsystemby______tomeetavarietyofdifferenttypesofmachinetoolrequirements.

9.inordertoimprovethereliabilityoftheoperationoftheelectricalequipment,the_____and_____toconnectthegroundcallwork.

The10.principlediagramofelectriccontroldesignaccordingtothemaincircuit,_____,_____,generalinspectionorder.

11.differenceprincipleisthestartingpointoftheknowncoordinatesofthetrajectoriesandendpointcoordinatedatasystem_____byreal-timecalculatingthecoordinatesof_____.

12.changeandmotorrotationdirection,generallyused_____;changeseriesmotorrotationdirection,generallyused_____.

13.DCmotorundertheratedloadoperation,thecommutationsparkshouldnotexceed_____.TheprovisionsofthestatefivesparkgradeDCmotor,_____levelisnospark.

14.workinordertomaintainthesafetyofpersonnelandequipment,currenttransformerinoperation,notwoside______,whenthecurrenttablemustberemovedfromthecurrenttransformerusedon,shouldfirstbetwosidetransformerreliably______,thentheinstrumentconnectinglineopened.

15.JITisthemodeofproduction,itscoreis_____.

Two,themultiple-choicequestions（pleasefillinthebracketsofthecorrectanswer,1pointspersubject,15questions,15points）

1.commonemitteramplifiercircuit,whenno-load,theoutputsignalissaturateddistortion.Whentheinputsignalremainsunchanged,iftheloadRLisconnected,thedistortiondisappears.Thisisdueto.

（A）workpointchange（B）,collectorsignalcurrentdecreases（C）,ACequivalentloadimpedancedecreases

The2.PLCtransformationequipmentcontroladoptsthePLCprogrammablecontrollertoreplacethelargeandcomplex（）controldeviceintheoriginalequipmentcontrol.

（A）analog（B）relay（C）sequentiallogiccircuit

3.highperformancehighvoltagefrequencyconverter,maincircuitswitchdeviceadopts（）.

（A）powerfieldeffecttransistors（B）insulatedgatebipolartransistor（C）powertransistors

4.,whenteachingtheoreticaltraining,inadditiontotheteachingmaterials,weshouldintroducesomeaspectsofthejob.

（A）newfourapplication（B）case（C）technologydynamics

5.CMOSintegratedcircuitinput（）.

（A）Bisnotallowed,andCmustbeleftvacant

Thedecimalnumberrepresentedbythe6.8421BCDcode（001010000011）8421BCDis（）.

（A）643（B）283（C）640

7.,whenlogicfunctionsaresimplified,theyareusuallysimplifiedinto（）expressions.

（A）andor（B）andnon（C）ornon

8.symmetricalthree-phasefourwirepowersupplyUL1L2=380/60~V,three-phaseaccesstoadeltaconnectedload,IL1=10/30~A,P=theactivepowerconsumedbytheload（）.

（A）6.6kW（B）3.3kW（C）5.7kW

Nine

Ifthetransformeroiltemperatureisfoundtobethesameasusual,undertheconditionofhighloadandheatdissipation,thetransformerinternalfaultshouldbeconsidered.

（A）5DEGC（B）,20DEGC（C）,10DEGC;

10.,theDCmotorspeedregulationschemeismoreandmoreinclinedtoadopt（）speedregulationsystem.

（A）directcurrentgeneratordirectcurrentmotor（B）ACmagnetmotorenlargementDCDCmotor;

（C）thyristorcontrolledrectifierDCmotor

11.afterreducingthesupplyvoltage,thecriticalslipofthethree-phaseasynchronousmotorwillbe（）.

（A）increasing（B）decreasing（C）constant

Anumberofwindings12.knownidealtransformeris160turns,thetwowindingis40turns,thentheequivalentresistanceof1Kinthetwowindingtooneside,theresistance（for）.

（A）4Komega（B）16K（C）1KOmega

13.inNCinstructions,theTcodeisused（）.

（A）spindlecontrol（B）changetool（C）auxiliaryfunction

14.theindicatortypemetershallmeasurethedirectcurrentiftheACgearismeasuredwithinthepermissiblerangeofmeasurement,andthemeasuredvaluewillbemeasured.

（A）greaterthan（B）lessthan（C）equalto

15.whentheordinarypowermeterisconnected,therelationbetweenthevoltagecoilandthecurrentcoilis

（A）thevoltagecoilmustbeconnectedtothefrontofthecurrentcoil（B）.Thevoltagecoilmustbeattachedtothebackofthecurrentcoil（C）,dependingonthecircumstances

Three,determinethetitle（therightinparenthesespleasetick"wronghit"X",eachof1points,atotalof1515points）

ISO9000-4istheguidingstandardinthe1.ISO9000standard.（）

2.practicehasprovedthatlowfrequencycurrentharmtohumanbodyissmallerthanhigh-frequencycurrent.（）

The3.CSBcentralserviceboardisanabbreviationforCENTERSERVICEBOARD.（）

4.SIN840Ccanimplement3Dinterpolation.（）

5.threefoursolenoidvalve,whentheelectromagnetpowerlossdoesnotwork,notonlytomakethefloatingcylinder,andthehydraulicpumpunloading,shouldadoptthe"slideM"shapeinafunction.（）

6.inleanproduction,concurrentengineeringisadoptedinproductdevelopment.（）

7.replacingthewritteninstructionwiththeNOPcommanddoesnotaffectthecompositionoftheoriginalladderdiagram.（）

The8.cascadespeedregulationcanbeaddedtothepowergridormotorbyaddingthedifferentialpoweraddedtotheadditionalelectromotiveforce,soitbelongstotheslippowerfeedbackspeedregulationmethod.（）

Theoutputcharacteristicsofthe9.hollowrotorasynchronousspeedgeneratorhavehigheraccuracy,andtherotorinertiaissmaller,whichcanmeettherequirementsofrapidity.（）

10.inordertoobtaingreateroutputcurrentcapacity,multiplethreeterminalintegratedvoltageregulatorscanbedirectlyconnectedinparallel.（）

11.decoders,counters,adders,andregistersarecombinationallogiccircuits.（）

12.theactualoperationalamplifierinopen-loop,itsoutputisdifficulttoadjusttozeropotential,onlyinclosedloopcanbetransferredtozeropotential.（）

13.Schmidtflipflopsconvertslowlyvaryinganalogvoltagesintodigitalsignalswithvaryingstages.（）

14.bidirectionalthyristorwithratedcurrentof100Aandtwoantiparallelcommonthyristorswithratedcurrentof50A,bothofwhichhavethesamecurrentcapacity.（）

15.thebrushoftheDCmotorhascertainrequirementsonthepressureoftheswitch,andthedifferencebetweenthepressureofeachbrushshouldnotexceed5%.（）

Four,Janeanswer（5pointspersubject,atotalof4questions20points）

1.frequencyconvertertoproduceharmonicinterference,whichisdividedinto?

2.illustratesthebasiccomponentsofatypicalindustrialcontrolcomputersystem.

3.,thepreparationofCNCmachinetools,generalelectricalmaintenanceprocessbeforethenotes,inspectionandmaintenanceofDCservomotorprocessrequirements?

4.whatarethecriteriathatareusuallytakenintoconsiderationwhenselectingsteppingmotors?

Five,comprehensivequestions（10pointspersubject,atotalof2questions,20points）

1.three-phasefullbridgecontrolledrectifiercircuitwithlargeinductanceload,knownthree-phaserectifiertransformertwowindingconnectedintoastar,therectifieroutputUdcanvaryfrom0to220V,theloadoftheLd=0.2H,Rd=4

（1）,calculatethetwolinevoltageU21rectifiertransformer;

（2）averagevalueofthyristorcurrentITAV,effectivevalueITandthyristormaximumvoltageUTm;（3）selectthyristortype（thyristorvoltageandcurrentmargin2times）

2.whatarethecommondiagnosticmethodsintheelectricalfaultdiagnosisofcomplexequipment?

Answerflash.

Maintenanceelectricianoccupationskillappraisaltest-seniortechnician01referenceanswer

Fillintheblanks

1.mechanicaltransmissionsystem,detectiondevice2.,mainframe,drivedevice3.,speedregulation,electricalenergy

4.operationandmanagement;qualityassurance5.output;inputvolume6.120degrees;0degreesto150degrees

7.,dependingonthedeviationoftimeaccumulation;integral8.computernumericalcontrolsystem;software9.transformerneutralpoint;groundingelectrode

10.controlcircuit;interlockandprotection11.curveequation;eachintermediatepoint12.armaturereversalmethod;magneticfieldreverseconnectionmethod

13.1.114.opencircuit;short-circuit15.punctuality;timelyadaptationtoproduction;.

Two,multiple-choicequestions

1.C,2.B,3.B,4.A,5.A

6.B,7.A,8.A,9.C,10.C

11.C,12.B,13.B,14.A,15.C

Three、judgmentquestions

1.x2.x3.x5.V4.V

6.V7.x8.x10.V9.V

11.x12.x15.x14.V13.V

Four,Janeanswer

1.answer:

first,radiatedinterference,whichinterfereswiththesurroundingelectronicreceivingdevice.Thesecondisthatthemotorconduc