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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
0.8 W
1.57 W
2 W

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

Any of the above
Steam
Hydroelectric
Diesel

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Economics of Power Generation
Which of the following is an advantage of static capacitor for power factor improvement?

Little maintenance cost
Low losses
Ease in installation
All of the listed here

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Economics of Power Generation
Large capacity generators are invariably

Hydrogen cooled
Natural air cooled
Forced air cooled
Water cooled

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Economics of Power Generation
The fixed cost of energy generated

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

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

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

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