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Power Systems

Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 50 MJ
 5 MJ
 10 MJ
 500 MJ

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Power Systems
When series reactor is used in generating stations, the fault current magnitude is

 increased
 remains unaffected
 reduced
 any of the above

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

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

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Power Systems
Which one of following is employed as a moderator by CANDU type of slow thermal nuclear reactors

 Beryllium.
 Graphite.
  Heavy water.
 Water.

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Power Systems
In a regenerative cycle, feed water is heated by

  drained steam from turbine.
 exhaust gas.
 heaters.
 all of above.

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Power Systems
A buchholz relay is used for

 both 1 and 2
 protection of a transformer against all internal faults
 protection of a transformer against all external faults
 nether 1 nor 2

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