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Economics of Power Generation

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
1.57 W
0.8 W
2 W

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Economics of Power Generation
The fixed cost of energy generated

Depends on maximum demand
None of the listed here
Depends on units generated
Indepemdent of max demand and units generated

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

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Economics of Power Generation
Which plant can never have 100 percent load factor?

Base load plant
Hydroelectric plant
Peak load plant
Nuclear power plant

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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
Load curve helps in deciding

all of the listed here
total installed capacity of the plant
operating schedule of generating units
sizes of the generating units

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