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Electrical Machines

Electrical Machines
Swinburne test is conducted under which of the following condition?

 half load
 any of the above
 full load
 no load

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Electrical Machines
Universal motor have which of the following application?

  Traction.
  Food mixer.
  Domestic pump.
  Lift.

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Electrical Machines
Commutator pitches of duplex and simplex lap windings are respectively

 4 ang 1
 2 and 1
 4 and 2
 2 and 2

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Electrical Machines
For very sensitive and wide speed control, the preferable control method is

 Ward-Leonard control.
 Multiple voltage control.
 Field control.
 Armature control.

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Electrical Machines
Which of these types of motor is used in elevators?

 DC shunt motor.
 DC compound motor.
 DC series motor.
 None of these.

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Electrical Machines
If the excitation is increased, the power factor is

 lagging power factor
None of these
 unity power factor
 leading power factor

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MORE MCQ ON Electrical Machines

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