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Power Systems

Power Systems
Reflector nuclear reactor are made of

 boron.
  beryllium.
 steel.
 cast iron.

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Power Systems
What is the approximate efficiency of a normal thermal power station?

 60-70%
 45-55%
 20-25%
 30-40%

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Power Systems
In thermal plant most of the energy is wasted in

 turbines
 condenser
 boiler
 ESP

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Power Systems
In thermal power plants the size of coal after crushing

  20 - 25 mm.
  300 mm.
 200 - 205 mm.
 40 mm.

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Power Systems
The arc voltage produced in an AC circuit breaker is always

 in phase opposition with the arc current.
 lagging the arc current by 90°.
 leading the arc current by 90°.
  in phase with the arc current.

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Power Systems
The Gauss Seidel load flow method has following disadvantages. Which of the following statement is wrong?

 Unreliable convergence
 Slow convergence
 Choice of slack bus affects the convergence
 A good initial guess for voltages is essential for convergence

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