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Power Systems

Power Systems
Ferranti effect occurs under

 any of the above
 no load
 full load
 half load

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Power Systems
The insulation resistance of the 20 km long underground cable is 8 MΩ. Other things being same, the insulation resistance of 10 km long cable will be

 4 MΩ
 8 MΩ
 32 MΩ
 16 MΩ

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

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

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the incident current?

 100 A
 250 A
 200 A
 2500 A

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Power Systems
A network containing 50 buses in which 10 are the voltage control buses, 6 are the generator buses. Find the size of the Jacobian matrix?

 84*84
 33*33
 34*34
 83*83

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

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

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