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Power Systems

Power Systems
Pumped storage plant is a

 peak load plant
 both 1 and 2
None of these
 base load plant

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Power Systems
The load current in short circuit calculations are neglected because

 both 1 and 2
 short circuit currents are greatly out of phase with load currents
 nether 1 nor 2
 short circuit currents are much larger than load currents

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Power Systems
The steam power plant efficiency can be improved by

 using large quantity of water.
  using high temperature and high pressure steam.
 decreasing the load on the plant.
 burning large amount of coal.

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Power Systems
Mho relay is used for the protection of

 short length lines.
 no length criterion.
 medium length lines.
  long transmission lines.

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Power Systems
The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor?

 25%
 50.5%
 75%
 62.5%

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Power Systems
Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be

 0.05 pu
 0.45 pu
 0.25 pu
 0.15 pu

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