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Power Systems

Power Systems
The most commonly used material for insulators of overhead lines is

 porcelain
 glass
 PVC
 mica

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Power Systems
Ferranti effect will not occur in which of the following transmission lines

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

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Power Systems
Which of the following is not a secondary nuclear fuel

 Pu239.
 U233.
 None of above.
  U235.

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Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

 2.5 pu
 3.75 pu
 7.25 pu
 4.28 pu

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

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Power Systems
Most commonly used material for insulator is

 porcelain
 mica
 glass
All of these

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