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Economics of Power Generation

Economics of Power Generation
An ideal value of power factor is

1
0.75
0.5
0.8

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Economics of Power Generation
Which of the following is the disadvantage due to low power factor ?

Increased transmission losses
All of these
High cost of equipment for a given load
Poor voltage regulation

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Economics of Power Generation
Generating capacity connected to the busbars and ready to take load when switched on is known as

Spinning reserve
Hot reserve
Cold reserve
Firm power

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

All of these
Surge absorbers
Rod gaps
Horn gaps

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Economics of Power Generation
A load takes a current of I at a p. f. Of cos Ф. The wattless component of current is

None of the listed here
I sin Ф
I tan Ф
I cos Ф

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Economics of Power Generation
Alternators and transformers are rated in

kVA
kVAR
kW
None of the listed here

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