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Electrical Machines

Electrical Machines
Stepper motor is used in

 computer printers
 food processing
 traction
All of these

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Electrical Machines
Fufuraldehyde analysis is done to determine the

 condition of cork gaskets used in transformer.
  condition of paper insulation in transformer.
 condition of oil in transformer.
 condition of lamination on CRGO steel sheet.

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

 over compound generator
 shunt generator
 series generators
 both B and C

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Electrical Machines
A DC generator without commutator is a

 induction motor
 AC generator
 DC motor
 DC generator

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Electrical Machines
Hysteresis loop represents the area of

 copper loss
 hysteresis loss
 eddy current loss
 total iron losses

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Electrical Machines
Which of the following induction motor has the highest starting torque?

None of these
 Same in both induction motors.
 Squirrel cage induction motor.
 Slip ring induction motor.

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