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Electrical Machines

Electrical Machines
Which motor cannot be started on no load?

 shunt motors
 series motors
 cumulative compound motors
 both B and C

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Electrical Machines
In DC generators, the cause of rapid brush wear may be

 imperfect contact.
 any of above.
 severe sparking.
 rough commutator surface.

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Electrical Machines
Which of the following pairs is/are correct?

 open slot----- leakage flux is less
 closed slot----- leakage flux is high
 semi closed slot-----leakage flux is moderate
All of these

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Electrical Machines
We can apply source transformation to voltage source when a resistance is connected to it in

  13 HP.
  10 HP.
 15 HP.
 14 HP.

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Electrical Machines
In a DC Shunt Motor if the load current increases then field flux

 decreases.
 decreases
 increases.
 remains constant.

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Electrical Machines
In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree?

  270.
 45.
 30.
 180.

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MORE MCQ ON Electrical Machines

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