ECONOMICS OF POWER GENERATION QUIZ

When the power factor is increased

Active power increases

Line current decreases

Line current increases

Active power decreases

TRUE ANSWER : ?
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Load curve helps in deciding

sizes of the generating units

total installed capacity of the plant

all of the listed here

operating schedule of generating units

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Load factor of a power station is defined as

average load/maximum demand

average load x maximum demand

maximum demand/average load

(average load x maximum demand)172

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A consumer who consumes more electrical energy should pay

More fixed charges per unit

None of the listed here

Less fixed charges per unit

Less running charges per unit

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When the power factor improved, the kW capacity of alternator is

Unaffected

Increased

Decreased

None of the listed here

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The drawback of diminishing value method for calculating depreciation is that depreciation charges

Are small in early years

Are independent of rate of interest

Are high in later years

None of the listed here

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A load takes a current of I at a p. f. Of cos Ф. The wattless component of current is

None of the listed here

I sin Ф

I tan Ф

I cos Ф

TRUE ANSWER : ?
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When the power factor is improved, the lagging kVAR drawn from the supply will

Increase

Decreases

Remains same

None of the listed here

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Generators for peak load plants are usually designed for maximum efficiency at

Full load

25 to 50 % percent full load

25 percent overload

50 to 75 % percent full load

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Load factor of a power station is generally

equal to zero Diversity factor is always

less than unity

more than unity

equal to unity

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