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Power Systems

Power Systems
Lightning arresters are made up of which material?

 copper
 any of the above
 silicon oxide
 silver

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Power Systems
One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is

 140 MWhr
 135.3 MWhr
 130.2 MWhr
 120 MWhr

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

 remains unaffected
 reduced
 any of the above
 increased

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Power Systems
The ABCD constants of a 3-phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° â„§. The sending end voltage is 400 kV. The receiving end voltage under no load condition is

 500 kV
 600 kV
 400 kV
 350 kV

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Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively

 increases and decreases
 decreases and increases
 increases and increases
 decreases and decreases

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Power Systems
Which of the following is not a secondary nuclear fuel

 None of above.
  U235.
 U233.
 Pu239.

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