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Power Systems

Power Systems
If the load is short circuited, then reflection coefficient of voltage is

 -2
 1
 -1
 0

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Power Systems
Which of the following rotor is used in thermal power plants?

 either of these
 squirrel cage rotor
 salient pole rotor
 cylindrical rotor

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

 12 - 16.
  3 - 6.
 1 - 2.
  16 - 24.

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Power Systems
Which of following materials can be used as coolant

  Any of above.
 Helium.
 CO2.
 Heavy water.

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Power Systems
A steam power generation has an overall efficiency of 20 %. 0.6 Kg of coal is burnt per kWh of electrical energy generated. Calculated the calorific value of fuel

 7000 KCal / Kg.
  7166.67 KCal / Kg.
 7268.45 KCal / Kg.
 7562 KCal / Kg.

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Power Systems
A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV?

 0.25
 0.025
 0.05
 0.02

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