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Power Systems

Power Systems
Buchholz relay is used for protection of

  alternator.
  none of these.
  bus bar.
  transformer.

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Power Systems
Water hamming process in pen-stocks results in

  pressure increases.
  noise increases.
  noise increases, pressure increases, velocity decreases.
None of these

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Power Systems
Telecommunication lines are transposed to reduce the

All of these
 radio interference in communication lines
 voltage level
 efficiency

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Power Systems
Earthing switch is used for

All of these
 discharging residual energies
 protection of equipment from ground faults
 measuring of safety voltage

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Power Systems
Pump storage schemes are used to improve

 the power factor.
  the plant capacity factor as well as the load factor of the power system.
 the load factor.
 the diversity factor.

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Power Systems
In which of the following transmission lines capacitance effect is negligible?

 long transmission lines
 medium transmission lines
 both 1 and 3
 shoart transmission lines

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