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Economics of Power Generation

Economics of Power Generation
Depreciation charge are high in case of

Hydroelectric plant
Diesel plant
Thermal plant
Diesel plant

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Economics of Power Generation
When the power factor is unity, the relation between line currnet I and supply voltage V is

I lags V by 90°
I leads V by 90°
None of the listed here
I is in phase with V

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Economics of Power Generation
For a large installation, it is better to apply

Bulk correction to large motors
Individual correction to large motors
None of the listed here
Individual correction to small motors

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Economics of Power Generation
With reference to a power station which of the following is not a fixed cost?

Depreciation
Fuel cost
Interest on capital
Insurance charges

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

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

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Economics of Power Generation
The only motor that can be worked at leading power factor is

Synchronous motor
3-phase induction motor
1- phase induction motor
None of the listed here

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