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Electrical Machines

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

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

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Electrical Machines
Which of the following motor is more expensive for same KW output rating ?

 Synchronous motor.
 AC single phase motor.
 DC Shunt Motor
 Induction motor.

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Electrical Machines
In a seperately excited DC Motor if field current is increased, it will

 Reduce armature heating.
 Increase acceleration duration.
 Increase speed
 Reduce starting torque.

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Electrical Machines
Which of the following motor has the highest power factor at full load?

 Resistance split phase
 Shaded pole
 Capacitor run
 Capacitor start

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Electrical Machines
DC shunt motors are suitable for

 Lathes.
  All of this.
 Centrifugal pumps
 Blowers and fans.

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Electrical Machines
Compensating winding is placed in the

 pole shoe
 armature core
All of these
 main field

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MORE MCQ ON Electrical Machines

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