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Power Systems

Power Systems
The value of inductance used for compensation of arcing grounds is

 1/3ω²C
 3/ω²C
 3ω²C
 ω²C/3

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Power Systems
Which of the following relationships are not valid for short transmission lines

All of these
 Is = Ir
 A = D = 1
 B = C = Z

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Power Systems
Mho relay is used for protection of

  none of these.
  short lines.
  long lines.
  medium lines.

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Power Systems
A transmission line has surge impedance of 400 Ω, operating at Vs = Vr = 400 kV line is compensated with a shunt capacitance of 30%. The line is connected to a generator delivering 200 MW. Find the load angle with out and with compensation respectively?

 45° and 26°
 30° and 26°
 30° and 45°
 26° and 30°

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Power Systems
When a transformer is loaded, the secondary terminal voltage gains. That means power factor is

 lagging.
 zero.
 unity.
  leading.

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Power Systems
The function of reflector is to

 stop the chain reaction.
 reduce the speed of the neutrons.
  bounce back most of the neutrons that escape from the fuel core.
 none of above.

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