内河轮机电气试题精选,专门针对大管轮的（the inland river turbine electrical examination question selects, specially aims at the big pipe wheel）

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1、内河轮机电气试题精选,专门针对大管轮的（Theinlandriverturbineelectricalexaminationquestionselects,speciallyaimsatthebigpipewheel）1.toexpandtherangeofammetershuntresistanceincreases,themeasurablerangeofcurrent______.A.decreasesB.,increasesC.,andD.remainsunchangedAnswerA2.wattmetervoltagecoilnumber____

2、__,thinnerwires,andtheload______.A.less/lessseriesB./parallelC.more/seriesD.more/parallelAnswerD30thousandmeteriscomposedof______etc..A.header,measuringlineandswitchB.head,measuringcircuitandshellC.header,switch,andshellD.header,measuringline,switchandshellAnswerD4.rotorwindingsof

3、three-phaseasynchronousmotor,whenwindingwindingis______,squirrelcagewindingis______.A.open/closedB.closed/closedC.open/openD.closed/opencircuitAnswerB5.asynchronousmotorusingY-conversionmethodofstarting,startingcurrentanddirectcurrentwhenstartingis______,startingtorqueandstartingt

4、orquedirectratio______.A.1/3,1/3B.1/3,1C.1,1/D.,AnswerA6.asynchronousmotorinthemotorworkingstate,theslipSfor______.A.S>1B.S=0C.0

5、seriescapacitorSeriesresistanceofD.startingwindingonC.workingwindingAnswerA8.three-phaseasynchronousmotoratlightload,threepowerlinebrokearoot,thentherewillbe______phenomenon.A.energyconsumptionbraking,untilthestopB.motorcontinuestorun,butthecurrentincreases,themotorisseriouslyfeve

6、rC.reversebraking,motorreversalD.,duetomechanicalfrictionexists,themotorslowlystopAnswerB9.whenthesynchronousgeneratorwithinductiveload(suchasmotor),thearmaturereaction______.A.onlyhasdirectaxisdemagnetizationreaction,B.onlyhascrossaxisreactionC.onlyhasthedirectaxismagneticincreas

7、ingreactionD.,andhastwokindsofreactions:crossaxisanddirectaxisdemagnetizationAnswerD10.characteristicsofsynchronousgeneratorisagenerator______with______change.A.noloadvoltage/excitationcurrentB.terminalvoltage/excitationcurrentC.terminalvoltage/armaturecurrentD.no-loadvoltage/arma

8、turecurrentAnswerCIn11.theself-ex