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Power Systems

Power Systems
The value of inductance used for compensation of arcing grounds is

 3/ω²C
 3ω²C
 1/3ω²C
 ω²C/3

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Power Systems
NTPC (National Thermal Power Cooperation) has its only thermal power generating unit in West Bengal at

 Durgapur.
 Katwa.
 Bakreshwar.
 Farakka.

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

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

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Power Systems
If the frequency is increased, then skin effect will

 any of the above
 remains unaffected
 increases
 decreases

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Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm sinωt?

 1.47 msec
 9.68 msec
 2.63 msec
 4.68 msec

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Power Systems
A transmission line has surge impedance of 400 Ω, operating at Vs = Vr = 400 kV line is compensated with a shunt capacitance of 30%. Find the surge impedance loading with compensation?

 386 MW
 456 MW
 400 MW
 478 MW

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