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Electrical Machines

Electrical Machines
As compared to an induction motor, the air gap in a DC motor is

 less than 50%.
 more.
 between 50% and 90%.
 same.

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Electrical Machines
For a practical synchronous motor the pull out torque will occur when the torque angle is nearly equal to

 0°.
  75°.
 45°.
 30°.

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Electrical Machines
Which motor used in Lathe machine?

None of these
  D.C. cumulative compound motor.
  D.C . series motor.
  D.C. shunt motor.

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Electrical Machines
DC generator will not build up voltage

 if field resistance is more than critical resistance.
 due to wrong direction of rotation.
  if it has lost residual magnetism.
 any one of above.

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Electrical Machines
Rotating part of DC motor is known as

 Carbone brush.
 Armature.
 Starter.
 Pole.

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Electrical Machines
In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when

  there is no load on the generator.
  the generator runs on designed speed.
  the generator runs on overload.
  the generator runs on full load.

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MORE MCQ ON Electrical Machines

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