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Electrical Machines

Electrical Machines
Maximum power developed depends on

 load angle
 voltage
 reactance
 both 1and 2

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Electrical Machines
If the speed of a dc motor increases with load torque, then it is a

 comulatively compounded motor
 permanent magnet motor
 series motor
 differentially compounded motor

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Electrical Machines
Which of the following rotor requires damper winding?

 Cylindrical rotor.
None of these
 Both type rotor.
 Salient pole rotor.

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Electrical Machines
Which of the following motor has negative speed regulation?

 Cumulative compound motors
 Shunt motor
 Differential compound motor
 Series motor

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Electrical Machines
In a 3 - Φ IM in order to eliminate cogging the number of stator slots must be

  unequal to number of rotor slots and skewed in shape.
  an integral multiple of number of rotor slots.
  either (B) or (C).
  equal to number of rotor slots.

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Electrical Machines
Armature reaction depends on which of the following?

 power factor of load
 magnitude of load current
None of these
 both 1 and 2

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MORE MCQ ON Electrical Machines

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