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Electrical Machines

Electrical Machines
Open circuit test on transformer gives

 both 1and 2
 copper loss
 hysteresis loss
 eddy current loss

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Electrical Machines
No load test of 3-phase induction motor gives which of the following?

None of these
 variable loss
 constant loss
 both A and B

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Electrical Machines
The primary and secondary windings of a transformer are

 mechanically linked.
  conductively linked.
  inductively linked.
 electrically linked.

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Electrical Machines
Reluctance and hysteresis motors are the types of which electrical motor?

 3 - Φ induction motor.
 Stepper motor.
  1 - Φ synchronous motor.
 DC motor.

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Electrical Machines
In circle diagram for induction motor, diameter of circle represents which of the following ?

 Line voltage.
 Slip.
 Rotor current.
 Running torque.

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

  Rheostatic control.
  Ward Leonard control.
  Any of above method.
  None of above.

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