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Power Systems

Power Systems
Breaking current is a ------------------ value?

 any of the above
 average
 maximum
 RMS

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Power Systems
When a neutral point of 3 - Φ system is directly connected to earth then it has what type of grounding?

  Peterson coil.
  Reactance.
  Resistance.
  Solid.

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Power Systems
The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is

 j6 pu
 j1 pu
 j3 pu
 j9 pu

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Power Systems
Zero sequence currents can flow from a line into a transformer bank if the windings are in

 delta / star.
 star / grounded star.
 delta / delta.
  ground star / delta.

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Power Systems
The generating station suitable to operate as peak load plant is

  Pumped storage.
 Nuclear power station.
 Power station.
 Thermal power station.

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Power Systems
Surge tank is kept very close to the

 spill way
 generator
 pen stock
 turbine

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