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Power Systems

Power Systems
Which of following materials can be used as coolant

 Heavy water.
 CO2.
 Helium.
  Any of above.

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Power Systems
Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is

 1600 MW
 400 MW
 800 MW
 200 MW

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Power Systems
The radiation shield for a nuclear power reactor for biological safety is provided by having the reactor

  encased by thick concrete wall.
 encased thick metal wall.
 immersed in water pool.
 isolated from outside word with strong magnetic field.

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Power Systems
Maximum power transfer capability of transmission line can be increased by

 Using series capacitance
 Using bundled conductors
All of these
 Parallel transmission lines

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Power Systems
The ratio of reset to pick up current for an induction cup relay is approximately

  0.99.
 0.75.
 1.0.
 1.35.

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Power Systems
The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor?

 25%
 62.5%
 50.5%
 75%

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