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Power Systems

Power Systems
For large plants of capacity for more than 15 MW, what type of cooling is used

  Hydrogen.
  Water.
  Liquid.
  Air.

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Power Systems
Transmission line parameters of the short transmission line are

 1,0,Y,1
 Z,0,Y,1
 1,Z,Y,1
 1,Z,0,1

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the reflected voltage?

 -18.18 kV
 18.18 kV
 -81.82 kV
 81.82 kV

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Power Systems
One Kg of natural uranium gives energy equivalent to about

 1000 Kg of coal.
 5000 Kg of coal.
 100 Kg of coal.
  10500 Kg of coal.

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Power Systems
A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator. In order to produce power at 50 Hz, the numbers of pole are required in the generator

 12.
  24.
 16.
 6.

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Power Systems
Pelton wheel turbine is a

  medium head turbine.
  none of above.
  low head turbine.
  high head turbine.

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