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Power Systems

Power Systems
The amount of ash content in Indian coal

  60 %.
  45 %.
 20 %.
 35 %.

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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 kHz
 29 MHz
 2.9 kHz
 290 kHz

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Power Systems
Normally Z bus matrix is a

 null matrix
 sparse matrix
 unit matrix
 full matrix

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Power Systems
Nuclear reactors usually employ

 both of A and B.
  fission.
 none of above.
 fusion.

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Power Systems
In thermal power stations, economiser will

 reduce the heat
 increase the thermal efficiency
 both 2 and 3
 reduce the thermal efficiency

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Power Systems
Which device is used for protection of equipment from from damage caused by overload or short circuit?

 current transformer
 lightning arrester
 circuit breaker
 CVT

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