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Power Systems

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

 3ω²C
 ω²C/3
 1/3ω²C
 3/ω²C

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Power Systems
If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

 300 Amp.
 350 Amp.
 200 Amp.
  250 Amp.

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Power Systems
Which of the following is/are the disadvantages of phase modifiers?

 It consumes both active and reactive power
 It requires more maintenance because of running equipment
 Initial cost of synchronous phase modifier is higher
All of these

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Power Systems
Which turbine is ideally suited to pumped storage plants

 Impeller.
 Pelton.
 Francis.
  Kaplan.

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Power Systems
Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching?

 Air blast CB.
 SF6 CB.
  Vacuum CB.
 Oil CB.

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Power Systems
Inductance of transmission line will decrease when

 both GMD and GMR increase
 GMD increase and GMR decrease
 GMD decrease and GMR increase
 both GMD and GMR decrease

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