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Power Systems

Power Systems
Reflector nuclear reactor are made of

 boron.
 steel.
 cast iron.
  beryllium.

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Power Systems
Which of the following materials is/are used as moderators?

 beryllium
 heavy water
 graphite
All of these

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Power Systems
A 3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

 70 kVA.
 49 kVA.
  89.22 kVA.
  35 kVA.

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Power Systems
The line current IR flowing into balanced delta connected load is - j5 - 3 A. If the phase sequence is RYB the phase current IYB is

 10.
 55.1.
  5.
 20.

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Power Systems
For loss less line, find the ratio of length to the wave length of a signal for a phase shift of 0.05 radians?

 7.95 × 10³
 7.95 × 10-3
 8 × 10³
 2 × 10-3

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Power Systems
The overall efficiency of a steam power plant equal to

 the Rankine cycle.
 regenerative cycle.
  product of boiler efficiency, turbine efficiency and generator efficiency.
 binary vapor cycle.

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