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Electrical Machines

Electrical Machines
Stepper motor is used in

 computer printers
 food processing
All of these
 traction

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Electrical Machines
The induction motor shaft is made of

  aluminium.
  mild steel.
  cast iron.
  stainless steel.

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Electrical Machines
Which of following DC generator will be in a position to build up without any residual magnetism in the field?

 Shunt.
  Compound.
  Separately excited.
  Series.

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Electrical Machines
A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection.

  230.2 V.
 100 V.
 50 V.
 399 V.

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Electrical Machines
Which of the following motor is expensive for same Kw output rates?

 Synchronous motor.
 AC single phase motor.
 Induction motor.
 DC Shunt Motor

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Electrical Machines
The stator core of a 3 - Φ induction motor is laminated in order to reduce the

  eddy current loss.
  weight of the stator.
  both of the above.
  hysteresis loss.

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MORE MCQ ON Electrical Machines

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