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Electrical Machines

Electrical Machines
The wound rotor type IM is used for____________ speed operation.

  variable.
  minimum.
  maximum.
  constant.

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Electrical Machines
Eb/V ratio of a DC motor is an indication of

  Effiency.
 Starting torque.
 Running Torque.
 Speed regulation.

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Electrical Machines
In dc machines, the field-flux axis and armature-mmf axis are respectively along

 direct axis and indirect axis
 quadrature axis and interpolar axis
 direct axis and interpolar axis
 quadrature axis and direct axis

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Electrical Machines
The output power of any electrical motor is taken from the

 Field.
 Coupling mounted on the shaft.
 Armature.
 Motor frame.

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Electrical Machines
Synchronising power of a synchronous motor varies

 directly as synchronous reactances Xs
 inversely as 1/Xs
 directly as Xs2
All of these

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Electrical Machines
If the field winding connection of DC shunt motor is changed

 motor will become slow.
  It will run in opposite direction.
 It will run in same direction.
 motor will not run.

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MORE MCQ ON Electrical Machines

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