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Electrical Machines

Electrical Machines
Slip rings of an induction motors are made of

  carbon.
  stainless steel.
  aluminium.
  phosphor bronze.

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Electrical Machines
A flat compound generator is obtained from compound generator by connecting a variable resistor

 in series with the shunt field
 in series with the series field
 in parallel with the shunt field
 in parallel with the series field

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Electrical Machines
A 3 - φ induction motor can also be referred to as a

  shunt motor.
  asynchronous motor.
  repulsion motor.
  transformer.

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Electrical Machines
If starting current of a 3 - Φ induction motor is 5 times the rated current, while rated slip is 4 %, then ratio of starting torque to full load torque is

  1.
 0.4.
 0.6.
 0.8.

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Electrical Machines
For the same power output rating and full load speed, the motor will have poorest starting torque, is

 Cummulative compound.
 Series.
 Differential compound.
  Shunt.

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

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

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MORE MCQ ON Electrical Machines

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