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ELECTRICAL MACHINES

Electrical Machines
Ward Leonard control provides speed control

 in one direction only.
 below rated speed.
 above rated speed.
 in both direction.

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Electrical Machines
In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation.

 increase
 be unpredictable.
 decrease.
 remain the same.

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Electrical Machines
Which of the following DC Motor requires 3 point starter?

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

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Electrical Machines
To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

 any of above method.
 none of above.
 Ward Leonard control.
 rheostatic control.

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

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

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