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Electrical Machines

Electrical Machines
Example of double excited machine is

None of these
 DC Shunt Motor
 Synchronous motor.
 Both are correct.

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Electrical Machines
An auto transformer having a transformation ratio of 0.8 supplies a load pf 10 KW. The power transfered inductively from the primary to secondary is

  2 KW.
 0.
 8 KW.
 10 KW.

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Electrical Machines
Why are capacitors used with large AC induction motor?

  Improve power level.
  Improve power factor.
  Improve voltage level.
  Improve current level.

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Electrical Machines
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency?

 96%
 95%
 92%
 94%

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Electrical Machines
A compound motor has

  only shunt field winding.
  tertiary winding.
  both shunt and series field winding.
  only series field winding.

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

 Cummulative compound.
 Differentical compound.
  Series.
 Shunt.

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MORE MCQ ON Electrical Machines

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