Electrical Engineering MCQs

Page No. 234

The load factor of domestic load is usually____________?


a10 to 15%


b30 to 40%


c50 to 60%


d60 to 70%


View Answer 10 to 15%

The expected useful life of an hydroelectric power station is around_________________?


a15 years


b30 years


c60 years


d100 years


View Answer 100 years

For the same cylinder dimensions and speed, which of the following engine will produce least power?


aSupercharged engine


bDiesel engine


cPetrol engine


dAll of the above engines will equal power


View Answer Petrol engine

Which lightening stroke is most dangerous?


aDirect stroke on line conductor


bIndirect stroke on conductor


cDirect stroke on tower top


dDirect stroke on ground wire



Which of the following is the disadvantage of static capacitor for power factor improvement?


aEasily damaged by high voltage


bCannot be repaired


cShort service life


dAll of the above


View Answer All of the above

The efficiency of a plant is of least concern when it is selected as___________?


apeak load plant


bcasual run plant


ceither A. or (b)


dbase load plant


View Answer either A. or (b)

The primary reason for low power factor is supply system is due to installation of____________?


ainduction motors


bsynchronous motors


csingle phase motors


dd.c. motors


View Answer induction motors

In a load curve the highest point represents______________?


apeak demand


baverage demand


cdiversified demand


dnone of the above


View Answer peak demand

Most efficient plants are normally used as____________?


apeak load plants


bbase load plants


ceither A. or (b)


dnone of the above


View Answer base load plants

A power transformer is usually rated in____________?


akW


b kWh


ckVAR


dkVA


View Answer kVA

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