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Power Systems

Power Systems
Mho relay is used for protection of

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

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Power Systems
If the frequency is increased, then skin effect will

 remains unaffected
 decreases
 increases
 any of the above

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Power Systems
In an interconnected power system, the most suitable power plant to meet the peak load condition is

 hydro power plant
 nuclear plant
 pumped storage plant
 thermal plant

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Power Systems
Corona is accompanied by

 hissing sound
All of these
 power loss and interference
 violet visible light

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Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is

 45 kA.
  35 kA.
 55 kA.
 50 kA.

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Power Systems
In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is

  1.
  un changed.
 10.
 5.

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