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Economics of Power Generation

Economics of Power Generation
A load draws a power of 10 kW at a power factor of 0.707 lagging. The lagging kVAR drawn from the supply will be

5 kVAR
20 kVAR
10 kVAR
15kVAR

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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
Poor voltage regulation
High cost of equipment for a given load

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Economics of Power Generation
In a power plant if the maximum demand on the plant is equal to the plant capacity, then

Diversity factor will be unity
Load factor will be unity
Plant reserve capacity will be zero
Load factor will be nearly 60%

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Economics of Power Generation
Load factor for heavy industries may be taken as

10 to 20 %
50 to 70%
25 to 40%
70 to 80%

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Economics of Power Generation
An over excites synchronous motor on no load is called

Universal motor
Induction motor
Alternator
Synchronous condenser

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Economics of Power Generation
Load curve helps in deciding

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

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