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Electrical Machines

Electrical Machines
Hunting phenomenon is observed in which motor?

 Induction motor.
  Synchronous motor.
 DC motor.
 Both A and C.

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Electrical Machines
Swinburne test is conducted under which of the following condition?

 full load
 any of the above
 half load
 no load

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Electrical Machines
The noise resulting from vibrations of lamination set by magnetic forces, is termed as

  hum.
 magnetostriction.
 zoom.
 boo.

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Electrical Machines
For power factor improvement the synchronous motor is to be

 lightly loaded and underecited
 lightly loaded and over excited
 heavily loaded and underexcited
 heavily loaded and over excited

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Electrical Machines
Cross magnetization effects which of the following?

 both 2 and 3
 reduces the terminal voltage
 reduction in main field flux
 commutation

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Electrical Machines
If the air gap of IM is increased, ____________ will increase.

  air gap flux.
  magnetizing current.
  speed.
  power factor.

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MORE MCQ ON Electrical Machines

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