西交《高电压技术》在线作业（on line operation of high voltage technology）

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1、西交《高电压技术》在线作业（Onlineoperationofhighvoltagetechnology）Onlineoperationof"highvoltagetechnology"First,asinglequestion1.whichofthefollowingmaterialsishydrophobic?.A.siliconerubberB.electricporcelainC.glassDmetal?Thecorrectanswer:ALessthan2.oftheoperatingovervoltageis().A.powerfrequencyvoltageriseB.arcgr

2、oundingovervoltageIntrudingovervoltageofC.substationD.ferroresonanceovervoltage?Thecorrectanswer:BTheprotectionrangeof3.lightningrodusuallyreferstotheprobabilityoflightningstroke.ThespacerangeofA.0.1%ThespacerangeofB.1%ThespacerangeofC.0%ThespacerangeofD.10%?Thecorrectanswer:AAftertheimpactcoronaocc

3、ursonthe4.conductor,itmakes()TheincreaseofwaveimpedanceofA.wireThewavevelocityofB.wireincreasesAmplitudeincreaseofC.travelingwaveThecouplingcoefficientofD.wireincreases?Thecorrectanswer:D5.theionicstructureofthefollowingdielectricis().A.fiberB.micaC.airD.transformeroil?Thecorrectanswer:BTheprotectio

4、nratioof6.valvesurgearresterreferstotheratioofresidualpressureto(or)voltage.A.arcextinguishingB.ratingC.impulsevoltageD.powerfrequencydischarge?Thecorrectanswer:A7.thefollowinginstrumentsandmeasuringsystemscannotbeusedtomeasuredirectcurrenthighvoltageA.spheregapB.capacitordividerequippedwithlowvolta

5、gemeterC.electrostaticvoltmeterD.highresistanceresistanceseriesmicroamperemeter?Thecorrectanswer:B8.1A.B.C.D.?Thecorrectanswer:A9.whentheno-loadlineisswitchedon,themaximumovervoltageislikelytobe().A.1.5EmB.2EmC.3EmD.4Em?Thecorrectanswer:C10.whenthereisacertaindistancebetweenthearresterandtheprotecte

6、dequipment,ifthereislightningwaveinvasion,theovervoltageappearingontheinsulationoftheprotectedequipmentwillbemorethantheresidualpressureofthearrester.A.islowerthanadeltaU;B.ishigherthanadeltaU;AsbigasC.;D.isnotnecessarily?Thecorrectanswer:B11.inpowerplantsandsubstations,theprotectionofdirectlightnin

7、gisusuallyusedA.lightningrodB.arresterC.shuntcapacitorD.groundingdevice?Thecorrectanswer:AOneofthemainreasonsforthehigherinsulatingstrengthof12.SF6gasis().A.colorlessandtastelessB.noncombustibilityC.i