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Electrical Machines

Electrical Machines
Maximum power developed depends on

 voltage
 reactance
 both 1and 2
 load angle

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Electrical Machines
The sparking at the the brushes, in a DC machines is due to

 high resistance of carbon brushes.
 presence of commutator.
 armature reaction.
  reactance voltage.

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Electrical Machines
A delta/star transformer is connected in parallel to a star/delta transformer. The turn ratio former is x times latter, the x is

 1/√3
 √3
 3
 1/3

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

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

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Electrical Machines
Which of following winding is connected in series with armature winding of DC machine?

 Both Compensating and Commutating pole winding.
 Commutating pole winding.
 Auxiliary winding.
 Compensating winding.

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Electrical Machines
In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when

  there is no load on the generator.
  the generator runs on overload.
  the generator runs on full load.
  the generator runs on designed speed.

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MORE MCQ ON Electrical Machines

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