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Electrical Machines

Electrical Machines
The application that need frequent starting and stopping is

  paper mills.
  jaw crushers.
  blowers.
  lifts and hoists.

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Electrical Machines
A crusher is equipped with

 DC shunt motor.
 Synchronous motor.
 Reluctance motor.
 Slip ring induction motor.

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Electrical Machines
Lamination of core are generally made of

 cast iron.
 stainless steel.
 carbon.
 silicon steel.

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Electrical Machines
Which type of bearing is provided in small induction motors to support the rotor shaft?

  Ball bearings.
None of these
  Bush bearings.
  Cast iron bearings.

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Electrical Machines
In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator?

 Can not be determined.
 Armature current.
 Mechanical power.
 Induced emf.

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Electrical Machines
The field divertor resistance for a DC series motor is of order of

 50 Ω
 0.1 Ω
 10 Ω
 100 Ω

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MORE MCQ ON Electrical Machines

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