Electrical Machines
A differentially compound motor under high-over-load conditions will behave like a / an

 cummulative compound motor.
 shunt motor.
  series motor.
 AC synchronous motor.

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Electrical Machines
Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces

  noise and pullout torque, but increase parasitic and starting torque.
  noise, parasitic and starting torque, but increase pull out torque.
  noise and parasitic torque, but increase starting and pull-out torque.
  noise, parasitic torque, starting torque and pull out torque.

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Electrical Machines
Which of the following represents the commutator pitch?

 Number of commutator segments between two successive coils.
 Number of conductors spanned by one coil at the front end of the armature.
 Number of conductors spanned by one coil at the back end of the armature.
 The distance between the staring of first coil and its next successive coil

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Electrical Machines
An ideal synchronous motor has no starting torque because

 rotor winding is highly reactive.
  relative velocity between stator and rotor mmf’s is not zero.
 rotor is made up of salient poles.
 relative velocity between the stator and rotor mmf’s is zero.

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