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POWER SYSTEMS

Power Systems
If in a line, resistance and reactance are found to be equal and regulation is zero, then load will have

 0.707 leading power factor
 0.707 lagging power factor
 unity power factor
 zero power factor

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Power Systems
The voltage regulation of a line at full load 0.8 power factor is 11. A long transmission line under no load conditions, for a good voltage profile needs

 shunt reactor at receiving end
 shunt resistance at receiving end
 shunt capacitor at receiving end
All of these

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Power Systems
The load current in short circuit calculations are neglected because

 nether 1 nor 2
 short circuit currents are much larger than load currents
 both 1 and 2
 short circuit currents are greatly out of phase with load currents

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Power Systems
Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be

 0.45 pu
 0.15 pu
 0.05 pu
 0.25 pu

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Power Systems
Making current is a------------ value?

 average
 RMS
 any of the above
 peak value

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