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

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

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

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