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Electrical Machines

Electrical Machines
In DC generators, the residual magnetism is of the order of

  2.5 %.
 10 %.
  15 %.
  20 %.

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Electrical Machines
Armature reaction effect is more in which of the following methods?

 armature resistance control
None of these
 field weakening method
 same in both methods

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Electrical Machines
Secondary winding of an auto transformer is also called

 tertiary winding.
  common winding.
 damping winding.
 compensating winding.

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Electrical Machines
DC shunt motors are suitable for

 Lathes.
 Blowers and fans.
  All of this.
 Centrifugal pumps

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Electrical Machines
Which of the following is/are the methods to reduce the armature reaction and its effects?

 pole stacking
 compensating winding
All of these
 pole chamfering

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Electrical Machines
Maximum power developed depends on

 both 1and 2
 voltage
 load angle
 reactance

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