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Power Systems

Power Systems
For symmetrical network, the neutral current is

 zero
 infinity
 maximum
 any of the above

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Power Systems
A transmission line has 200 km operating at frequency of 10 Hz Hz. Find the type of the line

 long transmission line
 medium transmission line
 any of the above
 short transmission line

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Power Systems
A steam power generation has an overall efficiency of 20 %. 0.6 Kg of coal is burnt per kWh of electrical energy generated. Calculated the calorific value of fuel

 7000 KCal / Kg.
 7562 KCal / Kg.
 7268.45 KCal / Kg.
  7166.67 KCal / Kg.

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Power Systems
If a 500 MVA, 11 kV 3-phase generator at 50 Hz feeds through a transfer impedance of (0+j0.605) Ω/phase, an infinite voltage also at 11 kV, then the maximum steady state power transfer on the base of 500 MVA and 11 kV is

 0.5 pu
 0.8 pu
 0.4 pu
 1 pu

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Power Systems
Transmission line parameters of the short transmission line are

 Z,0,Y,1
 1,Z,Y,1
 1,0,Y,1
 1,Z,0,1

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Power Systems
The insulator thickness on the conductor, in cables depends upon

 reactive power
 power factor
 voltage
 current

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