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Electrical Machines

Electrical Machines
Which of the following relation is correct?

 Xd < Xq.
None of these
 Xd = Xq.
 Xd > Xq.

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Electrical Machines
A 3 - Φ slip ring motor has

  any of the above.
  double cage rotor.
  short-circuited rotor.
  wound rotor.

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Electrical Machines
The rotor slots are slightly skewed in squirrel cage induction motor to

 decrease the amount of copper to be used.
 increase the strength of rotor bars.
 provide ease of fabrication.
 reduce the magnetic hum and locking tendency of rotor.

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Electrical Machines
If the speed of a dc motor increases with load torque, then it is a

 differentially compounded motor
 series motor
 comulatively compounded motor
 permanent magnet motor

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Electrical Machines
Addition of 0.3 % to 4.5 % silicon to iron

  reduces the saturation magnetization.
  increases the hysteresis loss.
None of these
  increases the electrical resistivity of iron.

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Electrical Machines
In DC shunt motor if load is increased, the speed

 increase proportional.
 reduce slightly.
 remains constant.
 increased slightly.

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MORE MCQ ON Electrical Machines

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