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Power Systems

Power Systems
Which material is used in controlling chain reaction in a nuclear reactor

 Beryllium.
 Heavy water.
  Boron.
 Thorium.

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Power Systems
Which of the following is an impulse turbine

  None of above.
  Francis turbine.
  Kaplan turbine.
  Pelton turbine.

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 20 kV
 83.76 kV
 52.84 kV
 48.36 kV

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Power Systems
The power output from an hydroelectric plants depend on

 type of dam, head, system efficiency.
 type of dam, type of catchment area and discharge.
 type of turbine, type of dam and type of catchment area.
  discharge, system efficiency.

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Power Systems
A string type insulator has three units with self capacitance C and ground capacitance of 0.2 C having a string efficiency of

 82%
 78%
 80%
 76%

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Power Systems
A diesel power station has fuel consumption of 0.28 Kg per kWh. The calorific value of fuel is being 10000 KCal / kg. Determine the overall efficiency

 40.85 %.
  30.7 %.
  30.26 %.
 40 %.

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