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Electrical Machines

Electrical Machines
Iron losses in a DC machine are independent of variation in

 speed.
  voltage.
  load.
  speed and voltage.

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Electrical Machines
A 250 V DC generator in run at rated speed with no excitation. The open circuit voltage will be

  very small, say about 2 or 3 V.
 about 100 V.
  250 V.
  zero.

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Electrical Machines
Which of the following motors is/are widely used?

 either of these
 slip ring induction motor
None of these
 squirrel cage induction motor

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Electrical Machines
Brushes are always placed on--------------- , in order to achieve sparkles commutation?

None of these
 MNA
 either GNA or MNA
 GNA

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Electrical Machines
In a synchronous motor, damper windings are provided on

None of these
  pole faces.
  stator frame.
  rotor shaft.

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Electrical Machines
Which of the following DC motors has got maximum relieving property?

 Cummulative compound.
  Series.
 Differentical compound.
 Shunt.

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MORE MCQ ON Electrical Machines

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