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Electrical Machines

Electrical Machines
Which single phase motor is used for a refrigerator?

  Split phase.
  Capacitor run.
  Universal.
  Repulsion.

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Electrical Machines
For power factor improvement the synchronous motor is to be

 lightly loaded and underecited
 heavily loaded and over excited
 heavily loaded and underexcited
 lightly loaded and over excited

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Electrical Machines
A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited?

 45°.
  10°.
 30°.
 24°.

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Electrical Machines
In case of a dc motor the ratio Eb / E is indicative of

  efficiency.
  ratio of starting to running current.
  ratio of input to output voltage.
  ratio of starting to running torque.

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Electrical Machines
A 3 - Φ slip ring motor has

  any of the above.
  double cage rotor.
  wound rotor.
  short-circuited rotor.

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Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

  salient.
 none of these.
 non uniform cylindrical.
 cylindrical.

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MORE MCQ ON Electrical Machines

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