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Power Systems

Power Systems
The amount of ash content in Indian coal

  60 %.
 35 %.
 20 %.
  45 %.

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Power Systems
For a lossy transmission line, the characteristic impedance does not depend on

 The load terminating the line.
 The operating frequency of the line.
 The permittivity of the dielectric separating the conductor.
 The conductivity of conductors.

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Power Systems
Which of following materials can be used as coolant

  Any of above.
 Heavy water.
 Helium.
 CO2.

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Power Systems
The function of moderator in a nuclear reactor is

All of these
  to slow down the neutrons.
 to increase the energy of the neutrons.
 to absorb the excess.

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Power Systems
For 800 MJ stored energy in the rotor at synchronous speed, what is the inertia constant H for a 50 Hz, four pole turbo generator rated 100 MVA, 11 kV?

 2 MJ/MVA
 8 MJ/MVA
 4 MJ/MVA
 6 MJ/MVA

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

 graphite
 liquid sodium
All of these
 beryllium

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