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Electrical Machines

Electrical Machines
Eb/V ratio of a DC motor is an indication of

 Speed regulation.
 Running Torque.
 Starting torque.
  Effiency.

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Electrical Machines
At stand still condition the value of slip is

 0
 1
 finite value
 infinite value

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Electrical Machines
Select the motor that should not be started on no load?

 Compound motor.
 Shunt motor.
  Series motor.
 Brushless DC motor.

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Electrical Machines
Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause

  less heating of the rotor.
  negative sequence current.
  all of these.
  less heating of the rotor.

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Electrical Machines
In shapers and slotters which motor are preferred?

  Synchronous motor.
  Slip ring IM.
  Squirrel cage IM.
  Double cage motor.

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Electrical Machines
A commutator in dc machine provide ----------------- rectification?

 half wave controlled
 half wave
 full wave
 full wave controlled

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MORE MCQ ON Electrical Machines

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