Electrical Engineering MCQs

Page No. 227

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


aElectric clock


bMixer grinder


c Ceiling fan


dRoom heater


View Answer Room heater

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


aremains unchanged


bdecreases


cincreases


dnone of the above


View Answer increases

For a consumer the most economical power factor is generally____________?


a0.5 lagging


b 0.5 leading


c 0.95 lagging


d0.95 leading


View Answer 0.95 lagging

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


aHigh maintenance cost


bContinuous losses in motor


cNoise


dAll of the above


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


bat the sending end


ceither A. or (b)


dnone of the above


View Answer at the receiving end

An induction motor has relatively high power factor at__________?


a rated r.p.m.


b no load


c20 percent load


dnear full load


View Answer near full load

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


aPhase advancers


bSynchronous compensators


cStatic capacitors


d Any of the above


View Answer Any of the above

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


aIt should run at high speed


b It should produce high voltage


cIt should be small in size


dIt should be capable of starting quickly



__________ is invariably used for peak load


aNuclear power plant


bSteam turbine plant


cPumped storage plant


dNone of the above


View Answer Pumped storage plant

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


aThermal power plant


b Diesel power plant


cNuclear power plant


dHydro-electric power plant


View Answer Diesel power plant

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