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Electrical Machines

Electrical Machines
Lamination of transformer core is made of

  cast iron.
 cast steel.
  silicon steel.
 wrought iron.

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Electrical Machines
Maximum power developed depends on

 voltage
 reactance
 load angle
 both 1and 2

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Electrical Machines
The rotor power output of 3-phase induction motor is 15 KW. The rotor copper losses at a slip of 4% will be

 600 W
 700 W
 625 W
 650 W

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Electrical Machines
As compared to an induction motor, the air gap in a DC motor is

 less than 50%.
 more.
 same.
 between 50% and 90%.

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Electrical Machines
Select the motor that should not be started on no load?

 Shunt motor.
 Compound motor.
  Series motor.
 Brushless DC motor.

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Electrical Machines
In DC machine yoke offers

 mechanical protection to the machine
 produce working flux
 both A and B
 flux path completion

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MORE MCQ ON Electrical Machines

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