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Power Systems

Power Systems
If skin depth is more, then skin effect is

 either 1 or 2
 more
None of these
 less

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Power Systems
Bonding is done at the both ends of the cable to reduce the

 copper loss
 sheath loss
None of these
 iron loss

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Power Systems
In relay coil which is used?

  Instrument transformer.
  Current transformer.
  Potential transformer.
  Power transformer.

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Power Systems
Which of the following relays is/are unit protection relays?

 over current relays
 Buccholz relays
 Differential relays
 both 1 and 2

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Power Systems
Which of the following is/are the methods of improving transient stability?

 Dynamic breaking
All of these
 Fast acting excitation control
 Fast acting governing system

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Power Systems
A thermal protection switch is used to provide protection against

 temperature.
  overload.
 short circuit.
 over voltage.

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