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Electrical Machines

Electrical Machines
Commonly used starters of cage motor is

  both A and B.
None of these
  DOL.
  star delta.

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Electrical Machines
When the rotor of a 3 phase induction motor is blocked then the slip is

  0.54.
 0.7.
  1.
 0.3.

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Electrical Machines
The crawling in the induction motor is caused by

 high loads
 low voltage supply
 harmonics developed in the motor
 improper design of stator laminations

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Electrical Machines
A frog leg winding is used in a DC machine to eliminate

 reactance voltage produced due to communication.
  the use equalizer in lap winding.
 the use drum winding.
 the use of compensating winding.

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Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

 4
 2
 1
 6

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Electrical Machines
The commutator segments of DC machines are made up of

 brass
 copper alloy
 copper
 hard-drawn copper

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MORE MCQ ON Electrical Machines

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