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Power Systems

Power Systems
Peak load power plants is/are

 diesel plant
 nuclear plants
 pumped storage plant
 both 1 and 2

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Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, the symmetrical breaking capacity is 2000 MVA, 3 secs. Then the making capacity is

 5200 MVA.
  5100 MVA.
 5500 MVA.
  5000 MVA.

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Power Systems
What type of back up protection is used for alternators?

  Impedance relay.
  Mho relay.
  Buchholz relay.
  IDMT relay.

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Power Systems
Transmission lines are transposed to reduce

 proximity effect
 skin effect
 ferranti effect
 interference with neighbouring communication lines

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Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 three
 one
 two
 six

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Power Systems
Calorific value of solid fuel is expressed as

  Cal / lt.
  KCal / gm.
  KCal / lt.
  Cal / gm.

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