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Power Systems

Power Systems
Pin insulators are used up to

 11 kV
 any voltage level
 33 kV
 120 kV

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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.
  Solid.
  Resistance.

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Power Systems
Highest pressure generating pump inside the thermal plant is

 boiler feed pump
 high pressure heater
 low pressure heater
All of these

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Power Systems
Steady state stability of a power system is improved by

 single pole switching
All of these
 decreasing generator inertia
 using double circuit line instead of single circuit line

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Power Systems
If the inertia constant H = 8 MJ/MVA for a 50 MVA generator, the stored energy is

 200 MJ
 8 MJ
 50 MJ
 400 MJ

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Power Systems
An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 500/5. The plug setting multiplier for a fault current of 5 kA is

 2
 8
 5
 6

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