电气工程自动化专业应聘笔试题 2.docx

电气工程自动化专业应聘笔试题 2.docx

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电气工程自动化专业应聘笔试题2

电气工程、自动化专业应聘笔试题（Electricalengineeringandautomationprofessionalcandidateswrittenexaminationquestions）

Theelectricpowerindustryofelectricalengineeringandautomationprofessionalcandidatesmustknow

Interpretationofnouninterpretation:

nouninterpretation

1,three-phasealternatingcurrent:

thepowersystemcomposedofthreeACcircuitswiththesamefrequency,thesameamplitudeofelectricpotentialandthephasedifferenceof120degreesangleiscalledthree-phasealternatingcurrent.

2,primaryequipment:

equipmentdirectlyrelatedtotheproductionofelectricalenergyandpowertransmissionanddistributioniscalledaprimaryequipment.Includingavarietyofhighvoltagecircuitbreaker,isolatedpowerindustryelectricalengineeringandautomationprofessionalcandidatesmustknowaglossaryglossaryGlossary:

1,thethree-phaseACpowersystem:

threebythesamefrequencyandamplitude,thephasedifferenceisequaltothepotentialdifferencebetweenACcircuitcomposedof120degrees,calledthree-phasealternatingcurrent.2,primaryequipment:

equipmentdirectlyrelatedtotheproductionofelectricalenergyandpowertransmissionanddistributioniscalledaprimaryequipment.Itincludesallkindsofhighvoltagecircuitbreaker,disconnectingswitch,bus,powercable,voltagetransformer,currenttransformer,reactor,lightningarrester,arcsuppressioncoil,shuntcapacitorandhighvoltagefuse.

3andtwoequipment:

auxiliaryequipmentformonitoring,measuring,manipulation,controlandprotectionofprimaryequipment.Suchasvariousrelays,signaldevices,measuringinstruments,recordingrecordingdevicesandtelemetry,remotesignaldevicesandavarietyofcontrolcables,smallbuses,etc..

4,highvoltagecircuitbreakerandhigh-voltageswitch,itcannotonlycutofftheloadcurrentandloadcurrenthighvoltagecircuitorclosed,andwhenafaultoccurs,theeffectoftherelayprotectiondevice,cutofftheoverloadcurrentandshort-circuitcurrent.

Ithasaperfectarcextinguishingstructureandsufficientbreakingcapacity.

5、loadswitch:

thestructureoftheloadswitchissimilartothesecretisolatingswitch,butonlyasimplearcextinguishingdeviceisinstalled.Italsohasanobviousdisconnectionpoint,whichhasacertainbreakingcapacity,canoperatewithload,butcannotdirectlydisconnecttheshortcircuitcurrent,ifnecessary,relyonthehighvoltagefuseconnectedwithittoachieve.

6,aircircuitbreaker（automaticswitch）isamanual:

（orelectric）closing,keepclosingpositionforlocking,lowvoltageswitchtrippingmechanismbyactingonthetripandhasanarcextinguishingdevice,iswidelyusedinACandDCdeviceinthe500Vbelow,whenthecircuitoverload,shortcircuit,voltagedropordisappear,canautomaticallycutoffthecircuit.

7,cable:

thecorewire（conductivepart）,plusinsulationlayerandprotectivelayerofthreepartsofthewirecalledcable.

8,bus:

busisacollectionofequipmentandelectricalpathdistributionofelectricenergy,whichdeterminesthenumberofequipmentdistributiondevice,andshowthatinwhatwaytoconnectthegenerator,transformerandline,andhowconnectedtothesystemtocompletethetaskoftransmissionanddistribution.

9,currenttransformer:

alsoknownasinstrumentconverter,isalargecurrentintosmallcurrentinstrument.

10.Transformer:

astaticelectricalequipment,whichisusedtochangetheACvoltageofacertainvalueintoanotheroneorseveralkindsofACvoltagewithdifferentvalues.

11,highvoltageelectroscope:

tocheckthehigh-pressurenetworkdistributionequipment,overheadlinesandcablesarechargedtools.

12,groundwire:

inordertopowerequipmentandlinesontheaccidentvoltageoccursunexpectedlytoensurethattheimportanttoolforstaff.AccordingtotheMinistryregulations,thegroundingwiremustbemadeofbarecopperflexiblewireabove25mm2.

13,sign:

towarnpeoplenottoequipmentandchargedpart,indicatingfortheworkplace,toremindthesecuritymeasures,andtheprohibitionofcertainequipmentoramicropowerlineclosingnoticesign.Itcanbedividedintowarningclass,permittedclass,promptclassandforbiddenclass.

14:

fence:

inordertopreventthestaffhasnointentiontotouchthepartofliveequipmentandinstalltheequipmentofscreenprotection,dividedtemporaryshelterandpermanentfencetwokinds.

15,insulationrod:

alsoknownasrod,insulationrod,joystickandsoon.Theinsulatingrodiscomposedofthreeparts:

theworkinghead,theinsulatingrodandthehandle.Itisusedforclosingoropeninghighvoltageisolatingswitch,installingandremovingportablegroundwire,andformeasuringandtesting.

16,stepvoltage:

ifthereisapotentialdifferencebetweentwopointsonthegroundhorizontaldistanceof0.8m,whenthetwofeetcontactthetwopoints,thebodywillbearthevoltage,thisvoltageiscalledstepvoltage.Themaximumstepvoltageappearsbetweenthegrounddistance0.8mandthegroundingbodyatthegroundlevelofthegroundingbody.

17,phasesequence:

thatistheorderofthephase,theinstantaneousvalueofalternatingcurrentfromnegativetopositivechangethroughthezeroorder.

18.Powernetworks:

powernetworksarepartofthepowersystem,

Itiscomposedofvarioustypesofsubstation（station）andvariousvoltageleveloftransmissionanddistributionlineconnectedcomponentsoftheunifiednetwork19,electricpowersystemisapartofpowersystem,whichiscomposedofgeneratorandpowerdistributionequipmentinpowerplant,step-upandstep-downsubstation,powertransmissionanddistributionlinesandelectricitytheequipment.

20,powersystem:

powerplants,substationsandusersofelectricityequipment,theinterphasebetweenthepowergridandthermalnetwork（orhydraulicsystem）connectedtotheoverallcalledpowersystem.

Two,multiple-choicequestions

1,tworatedvoltageofthesameresistance,seriesconnectedinthecircuit,thelargerresistance（A）.A,calorificvalueB,calorificvalueissmallC,thereisnoobviousdifference

2.Theswitchofmultimeterisrealized（A）.A,switchofvariousmeasuringtypesandranges,switchConcurrentofmultimeter,switchBformeasuringthemeasuredsubstance

3,insulationrodshouldbenormal（B）.A,placedastableB,sothattheydonotcontactwiththegroundandthewall,topreventdampdeformationC,placedinthecorner

4.Thetestcycleofinsulatingglovesis（B）.A,onceayear,Conceamonth,sixmonths,onceeveryfivemonths,B

5.Thetestperiodofinsulatingbootsis（B）.A,onceayear,Conceamonth,sixmonths,onceeverythreemonths,B

6.Whenyouneedtomoveorcrossthebarrierduringduty（C）.A,musthaveleadershippresenceB,mustfirstpoweroutageC,musthaveaguardianpresence

7,dutypersonnelpatrolhighvoltageequipment（A）.

A,therelayitselfdropsorlightsindicateB,shouldimmediatelyswitchonthelightandaudiocircuitC,shouldbeonesideitselfdropcard,whilethecontactclosedtoconnectothersignals

18.Whenthelinefails,therelayprotectiondevicecanquicklyremovethefaultpartand（B）.A,automaticreclosingonceB,sendsignalC,willcontinuetoruntheintactpart

19.Wheninstallingearthwire,itshouldbe（B）.A,installthephaseB,firstinstallthegroundingend,andtheninstallthetwosidesoftheC,firstinstallthewireend

20.Whenwearinggloves,thecoatcuffs（A）shouldbeputintouse.A,putininsulatedglovesB,rollupC,setoutsidetheglove

21,alineswitchpoweroutagerepair,linesidebypassoperation,atthistimeshouldbeontheswitchhandlehangingC（sign）.A,inthisworkB,prohibitclosingC,prohibitclimbing,highvoltagedanger

Three,fillintheblanks,fillintheblanks

1,safetyworkregulationisstipulatedinthefollowing:

equipmenttoearthvoltagehigherthan250Vishighvoltage;below250Vislowvoltage;safetyvoltageisbelow36V;safetycurrentisbelow10mA.

2,thedutystaffshouldremovetheworkbarrierforwork,therequiredsafetydistanceis0.7mat10KV,1mat35KV,1.5mat110kV,3mat220KV.

3,thunderstormsneedtopatroltheoutdoorhigh-voltageequipment,shouldwearinsulatedboots,andmaynotbeclosetothelightningarrester,lightningandgroundingdevice.

4,incaseofelectricalequipmentfire,shouldimmediatelycutoffthepowersupplyoftheequipment,andthenfire.

5,theoperatingdutycommontoolpliers,screwdriver,electricknife,spanner,pliers,electricironandlowvoltagetestpenciletc..

6.Inthegraphicsymboloftransformer,Yrepresentsthreephasecoilstarconnection.

7.Thecontrolroomsignalinsubstationisgenerallydividedintovoltagesignal,currentsignal,resistancesignal.

In8,prohibitedtheuseofelectricequipmentaroundthetape,lineruler,ametalrulerandmeasuringwork.

9,liveequipmentshouldusedrypowder,1211,carbondioxidefireextinguishers,fireextinguishersshallnotusefoamextinguisher.

10.ThecommonDCpowersupplyinsubstationisbattery,siliconrectifierandcapacitorenergystorage.

11,thesubstationlightingaccidentmustbeindependentpowersupply,andthecommonlightingcircuitcannotbemixed.

12,thehighvoltagecircuitbreakerordisconnectingswitchshouldbeopenedandclosed.

13,therelayprotectiondeviceandautomaticdeviceswitchingoperationtermsshouldbeinputandrelease.

14.Theoperationtermsofcheckingandinstallinggroundingwiresareinstallationanddismantling.

15,eachoperationticketcanonlyfillatask,eachoperationofa,a"tickmark".

16.Theexecutedoperatingnotesindicate"executed"".Invalidoperationshouldbemarked"invalid"word.Thetwooperationticketsshouldbe