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Power Systems

Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 10 MJ
 500 MJ
 5 MJ
 50 MJ

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Power Systems
In a thermal power plant, which of its following components needs maximum maintenance attention

 Super heater.
 Steam turbine.
 Boiler.
 Condenser.

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Power Systems
If a fault occurs on any feeder, the fault current is

  equal to unsectional bus bar.
  much higher than with unsectional bus bar.
  much lower than with unsectional bus bar.
  none of these.

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Power Systems
Objectives of power system is/are

 Rated voltage and frequency has to be supplied to the consumers
 both 1 and 2
 Cost of electrical energy per KWh is to be minimum
 nether 1 nor 2

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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?

  Reactance.
  Solid.
  Resistance.
  Peterson coil.

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Power Systems
Buchholz relay is used for protection of

  alternator.
  transformer.
  bus bar.
  none of these.

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