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Electrical Machines

Electrical Machines
The induction motor shaft is made of

  aluminium.
  cast iron.
  stainless steel.
  mild steel.

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Electrical Machines
Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become

 half.
 one fourth.
 double.
 4 times.

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Electrical Machines
Series generators are used in which of the following applications?

 Air crafts.
All of these
 Used as boosters in dc distribution or transmission.
 Arc welding.

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Electrical Machines
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop

  synchronous motor torque.
  induction generator torque.
  induction motor torque.
  DC motor torque.

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Electrical Machines
In induction motor wound rotor motor is mainly is used in application where

 power factor is less.
  less costly motor is not required.
  high starting torque.
  low starting torque.

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Electrical Machines
Ratio of starting torque to full load torque is minimum in

  Differential compound motor.
  Shunt motor.
  Series motor.
  Cumulative compound motor.

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MORE MCQ ON Electrical Machines

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