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Electrical Machines

Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

All of these
 minimum
 maximum
 zero

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Electrical Machines
Which motor cannot be started on no load?

 shunt motors
 cumulative compound motors
 both B and C
 series motors

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Electrical Machines
The current drawn by a DC motor at the time of starting is

 Normal.
 Very low.
 Zero.
 Very high.

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Electrical Machines
Which of the following rotor requires damper winding?

 Salient pole rotor.
None of these
 Both type rotor.
 Cylindrical rotor.

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Electrical Machines
In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is

  synchronous generator.
  asynchronous generator.
  asynchronous motor.
  synchronous motor.

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Electrical Machines
Example of double excited machine is

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

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MORE MCQ ON Electrical Machines

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