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ELECTRICAL MACHINES

Electrical Machines
In double cage induction motor, the outer cage offers

  low resistance and low reactance.
  high resistance and low reactance.
  high resistance and high reactance.
  low resistance and high reactance.

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Electrical Machines
Which of the following induction motor has maximum speed?

 4 pole.
 6 pole.
 8 pole.
  2 pole.

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Electrical Machines
High starting torque and low starting current is the advantage of

  hysteresis motor.
  squirrel cage induction motor.
  slip ring induction motor.
  stepper motor.

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Electrical Machines
Which method is less recommendable for induction motor starting in the industries?

  Stator resistance starting.
  Auto transformer starting.
  Rotor resistance starting.
  Direct online starting.

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Electrical Machines
The air gap between stator and the rotor of the 3 - φ induction motor is kept

  as wide as possible.
  air gap does not matter.
  as small as possible.
  depends on the material of stator and the rotor.

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