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Power Systems

Power Systems
In kaplan runner, the number of blades is generally of the order of

  16 - 24.
 1 - 2.
  3 - 6.
 12 - 16.

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Power Systems
Which of following power plants will take long period in erection and installation

 Hydro Power Plant
 Gas turbine.
 Nuclear.
 Thermal.

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Power Systems
Transmission lines are transposed to reduce

 ferranti effect
 interference with neighbouring communication lines
 skin effect
 proximity effect

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Power Systems
Which of the following relays is/are unit protection relays?

 Buccholz relays
 Differential relays
 both 1 and 2
 over current relays

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Power Systems
Making and breaking currents of 3 phase AC circuit breakers in power system are respectively in what form?

 Instantaneous and RMS value
 RMS and RMS value
 RMS and Instantaneous value
 any of the above

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Power Systems
Area under the daily curve divided by 24 gives

 maximum demand
 average load
 units generated
 maximum load

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