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Power Systems

Power Systems
A gas turbine power plant is best suited for

 Peak load.
 Emergency.
 Base load.
 None of these.

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Power Systems
The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is

 j1 pu
 j9 pu
 j6 pu
 j3 pu

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Power Systems
Inductance of transmission line will decrease when

 GMD increase and GMR decrease
 both GMD and GMR decrease
 GMD decrease and GMR increase
 both GMD and GMR increase

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Power Systems
In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)?

  2 × 106 kV / sec.
  3 × 106 kV / sec.
 1 × 106 kV / sec.
 3.5 × 106 kV / sec.

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Power Systems
A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F?

 0.5 F
 2 F
 4 F
 1 F

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Power Systems
A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. What is the reserve capacity of the plant?

 6000 kW
 7500 kW
 3750 kW
 3000 kW

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