Electrical Engineering MCQs

Page No. 234

The load factor of domestic load is usually____________?


a10 to 15%

✓


b30 to 40%

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c50 to 60%

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d60 to 70%

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View Answer 10 to 15%

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


a15 years

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b30 years

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c60 years

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d100 years

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View Answer 100 years

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


aSupercharged engine

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bDiesel engine

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cPetrol engine

✓


dAll of the above engines will equal power

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View Answer Petrol engine

Which lightening stroke is most dangerous?


aDirect stroke on line conductor

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bIndirect stroke on conductor

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cDirect stroke on tower top

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dDirect stroke on ground wire

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


aEasily damaged by high voltage

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bCannot be repaired

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cShort service life

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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

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bcasual run plant

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ceither A. or (b)

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dbase load plant

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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

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csingle phase motors

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dd.c. motors

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View Answer induction motors

In a load curve the highest point represents______________?


apeak demand

✓


baverage demand

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cdiversified demand

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dnone of the above

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View Answer peak demand

Most efficient plants are normally used as____________?


apeak load plants

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bbase load plants

✓


ceither A. or (b)

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dnone of the above

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View Answer base load plants

A power transformer is usually rated in____________?


akW

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b kWh

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ckVAR

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dkVA

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View Answer kVA

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