Electrical Machines
The type of DC motor used for shears and punches is

 Differential compound motor.
  Cummulative compound motor.
 Shunt motor.
 Series motor.

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Electrical Machines
The synchronous motor can be started by

  coupling it with a DC compound motor.
  coupling it with a small AC induction motor called the pony motor.
  providing damper winding in its rotor circuit.
  any of the above methods.

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Electrical Machines
In a DC machine the armature mmf is

  stationary with respect to armature.
 rotating with respect to field poles.
  rotating with respect to field poles as well as armature.
  stationary with respect to field poles.

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Electrical Machines
The armature mmf of a DC machine has

  triangular space distribution and rotates at the speed of armature.
  triangular space distribution and is stationary in space.
 stepped distribution and rotates at the speed of armature.
  trapezoidal space distribution and is stationary in space.

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