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Electrical Machines

Electrical Machines
Example of double excited machine is

 DC Shunt Motor
None of these
 Both are correct.
 Synchronous motor.

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Electrical Machines
Ward Leonard control provides speed control

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

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Electrical Machines
A delta/star transformer is connected in parallel to a star/delta transformer. The turn ratio former is x times latter, the x is

 1/3
 √3
 1/√3
 3

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Electrical Machines
In which of the following generators negative voltage regulation can occur?

 both B and C
 shunt generator
 over compound generator
 series generators

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Electrical Machines
A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere.

 220.4 volt.
  218.5 volt.
  None of these.
  120 volt.

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Electrical Machines
Which motors are preferred for refrigeration and air conditioning in smaller units?

  Stepper motors.
  Universal motors.
  Reluctance motors.
  Induction motors.

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MORE MCQ ON Electrical Machines

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