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Power Systems

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

 1/3ω²C
 3ω²C
 ω²C/3
 3/ω²C

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Power Systems
Surge impedance loading can be increased by

 increasing of inductance value
 increasing of capacitance value
 increasing of voltage level
 both 1 and 2

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Power Systems
If, for a given alternator in economic operation mode, the incremental cost is given by (0.012 P + 8) Rs/MWh, dPL/dP = 0.2 and plant λ = 25, then power generation is

 1250 MW
 1500 MW
 750 MW
 1000 MW

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Power Systems
Reactance relays are used for the protection of

 medium transmission lines only
 long transmission lines only
 short transmission lines only
All of these

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Power Systems
In thermal power stations, economiser will

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

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Power Systems
A 4 bus power system consists of 4 transmission lines, then find the sparsity of Y bus matrix?

 0.5
 0.4
 0.75
 0.25

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