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Economics of Power Generation

Economics of Power Generation
Large capacity generators are invariably

Water cooled
Forced air cooled
Natural air cooled
Hydrogen cooled

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

Are small in early years
None of the listed here
Are high in later years
Are independent of rate of interest

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Economics of Power Generation
In a 3 phase system, the line losses are W at a p. f. Of 1 . If the power factor becomes 0.8 lagging, the losses will becomes

1.25 W
0.8 W
2 W
1.57 W

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Economics of Power Generation
Power plant is expected to have the longest life.

Steam
Any of the above
Diesel
Hydroelectric

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Economics of Power Generation
When the power factor is increased

Active power increases
Active power decreases
Line current increases
Line current decreases

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Economics of Power Generation
The power transformer is usually rated in

kWh
kVA
kVAR
kW

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