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Power Systems

Power Systems
If the penalty factor of a plant is unity, its incremental transmission loss is

 0
 -1
 1
None of these

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

  Increase but does not doubled.
 Doubled.
 Decrease but does not halves.
 Halves.

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Power Systems
Which device is used for protection of equipment from from damage caused by overload or short circuit?

 circuit breaker
 current transformer
 CVT
 lightning arrester

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Power Systems
In hydro power stations what is an enlarged body of water just above the intake and used as a regulating reservoir called

 Spillways.
 Penstock.
 Reservoir.
  Fore bay.

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Power Systems
The total number of strands(N) is concentrically stranded cable with total annular space filled with strands of uniform diameter is given by (if x is number of layers)

 N = 3x²-3x+1
 N = 3x²-6x+1
 N = 3x²-2x+1
 N = 3x²+3x+1

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

 one
 three
 two
 six

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