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Electrical Machines

Electrical Machines
A 8 pole, 50 Hz single phase induction motor is running at 690 rpm. Its slip with respect to forward field is

 -1.92
 -0.08
 0.08
 1.92

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Electrical Machines
If a DC Series motor is connected across an AC supply it will

 run at lower speed.
 not run.
 run at normal speed.
 burn.

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Electrical Machines
The three point starter is used for

  Shunt motor.
  Shunt motor as well as compound motors.
  Shunt, compound and series motor.
  Series motor.

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Electrical Machines
A 3 - Φ slip ring motor has

  short-circuited rotor.
  double cage rotor.
  any of the above.
  wound rotor.

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Electrical Machines
If the field winding connection of DC shunt motor is changed

 motor will become slow.
 motor will not run.
  It will run in opposite direction.
 It will run in same direction.

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Electrical Machines
When two DC series motors are connected in parallel, the resultant speed is

 less than normal speed.
 zero.
 normal speed.
 more than normal speed.

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MORE MCQ ON Electrical Machines

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