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Power Systems

Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 three
 six
 two
 one

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Power Systems
Lightning arresters are used for

 protection of equipment from external lightning
All of these
 protection of equipment from short circuits
 protection of equipment from open circuits

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Power Systems
The pickup value of relay is 6.5 Amp and fault current in relay coil is 39 Amp. Its plug setting multiplier is

 10 A.
  6 A.
 8 A.
 7 A.

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Power Systems
On what factors does the selection of a water turbine depend

  All of above.
 Nature of load.
 Speed.
 Working head.

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Power Systems
For head and low discharge the water turbine used

  Pelton wheel.
 Francis turbine.
 Kaplan wheel.
 propeller turbine.

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Power Systems
Which of the following is not base load power plant

  Pump storage.
  Diesel.
  Nuclear.
  Run water.

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