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Power Systems

Power Systems
Breaking current is a ------------------ value?

 maximum
 average
 any of the above
 RMS

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Power Systems
Advantages of per unit system is/are

 No units for any quantity
All of these
 It has units for all quantities
 Need of transformation ratio

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Power Systems
For variable heads of near about but less than 30 meters, which type of turbine is used in hydro power station?

None of these
 Pelton
 Francis
 Kaplan

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Power Systems
a 50 Hz, 3-phase synchronous generator has inductance per phase of 15 mH. The capacitance of the generator and circuit breaker is 0.002 µF. What is its natural frequency?

 29 MHz
 290 kHz
 29 kHz
 2.9 kHz

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Power Systems
When a nuclear reaction is operating at constant power the multiplication factor is

  1.
 less than 1.
 greater than 1.
 may be any of the above.

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Power Systems
Resistance switching in normally employed in

 minimum oil breakers.
 bulk oil breakers.
  air blast circuit breaker.
 all breakers.

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