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Electrical Machines

Electrical Machines
Oil is provided in an oil filled transformer for

 cooling.
  both cooling and insulation.
  insulating.
 lubrication.

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Electrical Machines
The flux is maximum in the following part of a DC motor:

 under the interpole.
 under trailing pole tip.
 under leading pole tip.
 pole core.

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Electrical Machines
A smaller air gap in a induction motor helps to

 reduce the chance of crawling.
 increase the starting torque.
 reduce the chance of cogging.
 reduce the magnetizing current.

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Electrical Machines
Swinburne's test is applicable to

 DC compound motor.
 DC shunt and level Compound motor.
 DC Shunt motor.
 DC series motor.

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Electrical Machines
Which slots are used in the rotor of an induction motor?

  Open slots.
  Semi closed slots.
  Closed slots.
  None of above.

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Electrical Machines
Normally for the design of transformer the ambient temperature is taken as

  45°C.
 27°C.
 32°C.
 35°C.

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MORE MCQ ON Electrical Machines

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