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Power Systems

Power Systems
In nuclear power plants which material is/are used as coolant?

 liquid sodium
 graphite
All of these
 beryllium

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Power Systems
A cable has the following characteristics, L = 0.201 µH/m and C = 196.2 pF/m. The velocity of wave propagation through cable is

 159.24 m/s
 159.24 m/µs
 0.0312 m/s
 32 m/s

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

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

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Power Systems
The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to

 125 electrical degrees/s²
 12.5 electrical degrees/s²
 22.5 electrical degrees/s²
 225 electrical degrees/s²

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Power Systems
Demand factor of a plant is

 greater than 1
 0
 1
 less than 1

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Power Systems
A CT is connected in ___________________ with the line.

  not connected.
  across.
  series.
  both A and B.

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