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Power Systems

Power Systems
Phase shift occurs due to which of the following components?

 conductance
 both 1 and 2
 capacitance
 inductance

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Power Systems
The sequence components of the fault current are as follows : Ipositive = j1.5 pu, Inegative = − j0.5 pu, Izero = − j pu Which fault is this?

  LL.
  LG.
  LLG.
  LLLG.

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Power Systems
The function of moderator in a nuclear reactor is to

  stop chain reaction.
 absorb neutrons.
  reduce the speed of neutrons.
 reduce temperature.

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Power Systems
A network containing 100 buses in which 10 are the voltage control buses, 5 are fixed shunt capacitor buses, 20 are the reactive power support buses, 6 are the generator buses. Find the size of the Jacobian matrix?

 162 × 162
 165 × 165
 164 × 164
 163 × 163

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Power Systems
Which of the following statements is/are true? Corona is reduced by

All of these
 increasing the radius of the conductor
 decreasing the supply frequency
 increasing the distance between the conductor

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Power Systems
The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation

 Z1 = Z2 = Z0
 (Z1 = Z2) > Z0
 (Z1 = Z2) < Z0
 any of the above

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