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Electrical Machines

Electrical Machines
Example of double excited machine is

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

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Electrical Machines
What does happen if tripled harmonics given to induction motor?

  Nothing will happen.
  Will results in open circuit.
  Will results in short circuit.
  Fail to start.

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Electrical Machines
In a resistance split phase motor, what is the range of torque angle?

 0°
 25° to 30°
 70° to 85°
 90°

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Electrical Machines
In V/f speed control of 3-phase induction motor, with increase in frequency, the slip at which maximum torque occurs

 decrease.
 increase.
 either of these.
None of these

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Electrical Machines
Star - delta method of starting of motor is not possible in case of

  low horse power motor.
  high torque motor.
  single phase induction motor.
  high speed motor.

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Electrical Machines
The torque speed characteristics of a AC servomotor is approximately

 any of the above
 parabola
 hyperbola
 linearised

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MORE MCQ ON Electrical Machines

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