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Economics of Power Generation

Economics of Power Generation
Load factor of a power station is generally

more than unity
equal to unity
less than unity
equal to zero Diversity factor is always

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Economics of Power Generation
Annual depreciation cost is calculated by

Sinking fund method
None of the listed here
Both sinking fund and straight line method
Straight line method

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Economics of Power Generation
In a 3 phase system, the line losses are

Invesely proportional tocos Ф
Inversely proportional to cos²Ф
None of the listed here
Directly proportional to cos Ф

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Economics of Power Generation
Arc and induction furnaces operate on

Very high leading p. f.
Very Low lagging p. f.
Very low leading p. f.
None of the listed here

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Economics of Power Generation
Which of the following devices may be used to provide protection against lightening over voltages ?

Horn gaps
Surge absorbers
Rod gaps
All of these

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Economics of Power Generation
The most economical power factor for a consumer is generally

1
0.75 lagging
0.6 lagging
0.95 lagging

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