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Power Systems

Power Systems
In which of the following given faults, all the sequence currents are equal?

 LLL
 LG
 LLG
 LL

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Power Systems
Which of the following is/are the effects of corona

All of these
 power loss decreases
 interference decreases
 charging current increases

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Power Systems
The rate of rise of re-striking voltage is dependent upon

 capacitance of the system only
 inductance of the system only
 both 1 and 2
 resistance of the system only

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Power Systems
A transmission line is operating under no load has ABCD parameters B = 100∠90° has a phase shift of 0.2 rad, how much shunt reactor is required for compensation of ferranti effect?

 15.9 H
 15.9 mH
 2 H
 2 mH

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Power Systems
In a 3-phase, 5 kV, 5 MVA system, what is the base impedance?

 0.5 ohm
 500 ohms
 5 ohms
 50 ohms

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Power Systems
Ships are usually supplied power by

 Hydraulic turbine.
 Steam accumulator.
  Diesel engine.
 None of above.

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