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Power Systems

Power Systems
In Francis turbine runner, the number blades is usually of the order of

 6 - 8.
  16 - 24.
 3 - 6.
 12 - 14.

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Power Systems
In relay coil which is used?

  Power transformer.
  Instrument transformer.
  Current transformer.
  Potential transformer.

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Power Systems
The load current in short circuit calculations are neglected because

 both 1 and 2
 short circuit currents are much larger than load currents
 short circuit currents are greatly out of phase with load currents
 nether 1 nor 2

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Power Systems
Characteristics of arc quenching medium is/are

All of these
 High thermal conductivity
 High dielectric strength
 Non flammable

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Power Systems
In a thermal power plants, pressure in the working fluid cycle is developed by

 superheater.
  feed water pump.
 condenser.
 turbine.

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Power Systems
A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station?

 18 MW
 5 MW
 9 MW
 10 MW

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