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Electrical Machines

Electrical Machines
If the field current is reduced to zero the maximum power developed by alternator is

 1.644 KW.
  2.73 KW.
 0.9103 KW.
 5.46 KW.

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Electrical Machines
Pole changing methods are suitable only for ___________ type induction motor.

  none of these.
  wound.
  linear.
  cage.

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Electrical Machines
The armature of a DC motor is laminated to reduce

 copper loss.
 friction and windage loss.
 hysteresis loss.
 eddy current loss.

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Electrical Machines
Which of the following statement is true for an AC synchronous motor?

 It is a step angled motor.
 It is a high reluctance motor.
 It is a variable speed motor.
  It is a constant speed motor.

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Electrical Machines
A DC generator beyond critical resistance will generate

 maximum power.
 no voltage.
 maximum voltage.
 maximum current.

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Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

 0o.
 less than 90o.
 90o.
 Greater than 90o.

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