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Power Systems

Power Systems
A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base?

 0.25 pu
 1 pu
 5 pu
 0.2 pu

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Power Systems
For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes is

 Impeller.
 Francis.
 Pelton.
  Kaplan.

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Power Systems
Capacitance voltage transformer ( CVT ) is used to

 connect instruments on the LT side.
  improve the power factor of the transmission.
 reduce losses in a transmission line.
 none of these.

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Power Systems
To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with

 3rd harmonic current.
 7th harmonic current.
 2nd harmonic current.
  5th harmonic current.

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Power Systems
How much KWh energy is produced by fission of 1 gm of uranium U235

 2400 kWh.
  24000 kWh.
 240 kWh.
  24 kWh.

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Power Systems
Nuclear power plant are used as

 intermediate load plants.
 peak load plants.
  base load plants.
 none of above.

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