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Power Systems

Power Systems
In nuclear power plants which material is/are used as coolant?

 liquid sodium
 graphite
All of these
 beryllium

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Power Systems
A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?

 29.28 kV
 28.28 kV
 30.28 kV
 31.28 kV

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Power Systems
In hydro power stations what is an enlarged body of water just above the intake and used as a regulating reservoir called

 Penstock.
  Fore bay.
 Reservoir.
 Spillways.

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Power Systems
Which of following power plants normally operage at high speeds

 Hydro electric.
  Thermal.
 Diesel engine.
 Petrol engine.

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Power Systems
If the penalty factor of a plant is unity, its incremental transmission loss is

 1
 0
None of these
 -1

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Power Systems
At slack bus, which one of the following combinations of variables is not specified?

 Q and V
 P and Q
 V and δ
 P and V

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