Electrical Engineering MCQs

Page No. 227

__________ will be least affected due to charge in supply voltage frequency.


aElectric clock

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bMixer grinder

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c Ceiling fan

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dRoom heater

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View Answer Room heater

In an interconnected system, the diversity factor of the whole system:


aremains unchanged

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bdecreases

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cincreases

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dnone of the above

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View Answer increases

For a consumer the most economical power factor is generally____________?


a0.5 lagging

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b 0.5 leading

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c 0.95 lagging

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d0.95 leading

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View Answer 0.95 lagging

Which of the following is the disadvantage of a synchronous condenser?


aHigh maintenance cost

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bContinuous losses in motor

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cNoise

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dAll of the above

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View Answer All of the above

In a distribution system, in order to improve power factor, the synchronous capacitors are installed__________?


aat the receiving end

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bat the sending end

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ceither A. or (b)

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dnone of the above

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View Answer at the receiving end

An induction motor has relatively high power factor at__________?


a rated r.p.m.

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b no load

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c20 percent load

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dnear full load

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View Answer near full load

By the use of which of the following power factor can be improved?


aPhase advancers

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bSynchronous compensators

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cStatic capacitors

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d Any of the above

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View Answer Any of the above

Which of the following is the essential requirement of peak load plant ?


aIt should run at high speed

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b It should produce high voltage

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cIt should be small in size

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dIt should be capable of starting quickly

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__________ is invariably used for peak load


aNuclear power plant

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bSteam turbine plant

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cPumped storage plant

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dNone of the above

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View Answer Pumped storage plant

Which of the following power plants need the least period for installation ?


aThermal power plant

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b Diesel power plant

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cNuclear power plant

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dHydro-electric power plant

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View Answer Diesel power plant

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