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Power Systems

Power Systems
Location of a surge tank, in an hydro electric power station is near

 reservoir.
 dam.
  turbine.
 tail race.

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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.
  Peterson coil.
  Resistance.
  Solid.

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Power Systems
Advantages of per unit system is/are

All of these
 Need of transformation ratio
 It has units for all quantities
 No units for any quantity

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Power Systems
The rating of CB is in terms of

  VAR.
  voltage.
  current.
  volt - ampere.

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Power Systems
Which of the following is/are the effects of corona

All of these
 power loss decreases
 interference decreases
 charging current increases

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Power Systems
What is the preferred type of circuit breaker(CB) to be installed in extra high voltage AC system?

 Vacuum CB
 Bulk oil type CB
 Air blast CB
 Sulphur hexafluoride CB

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