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Electrical Machines

Electrical Machines
Belt conveyors offer _______________ starting torque.

  medium.
  high.
  low.
  zero.

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Electrical Machines
The direction of rotation of a DC compound motor can be reversed by interchanging

 series field connections.
 armature or field connections.
 armature connections.
 shunt field connections.

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Electrical Machines
If the temperature of armature resistance is increased, the speed of a series motor would

 increase.
 not change.
 None of above.
 decrease.

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Electrical Machines
Lamination of transformer core is made of

 cast steel.
  silicon steel.
  cast iron.
 wrought iron.

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Electrical Machines
Example of double excited machine is

 Both are correct.
None of these
 Synchronous motor.
 DC Shunt Motor

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Electrical Machines
In a dc machine 72 number of coils are used. Find the number of commutator segments required?

 36
 72
 37
 74

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