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Electrical Machines

Electrical Machines
DC shunt motors are suitable for

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

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Electrical Machines
The voltage regulation of a DC generator at full load being zero implies that the generator is

 shunt connected.
  deferentially compounded.
  cumulatively compounded.
  series connected.

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Electrical Machines
The constant losses in transformer is/are

 copper loss.
 hysteresis loss.
 eddy current loss.
 both 2 and 3.

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Electrical Machines
In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is

  synchronous motor.
  synchronous generator.
  asynchronous generator.
  asynchronous motor.

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Electrical Machines
What is the effect of armature reaction ?

  Both option B and C.
 None of the options.
 Armature flux weakens the main field flux.
 Armature flux distorts the main field flux.

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Electrical Machines
In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses?

 0.5Kw
 3KW
 2KW
 1.5KW

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