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Electrical Machines

Electrical Machines
A DC generator can be considered as

 power pump.
 rectifier.
 rotating amplifier.
 prime mover.

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Electrical Machines
Universal motor have which of the following application?

  Lift.
  Food mixer.
  Traction.
  Domestic pump.

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Electrical Machines
A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be

 2.7 mWb.
 3.5 mWb.
  1.2 mWb.
 1.4 mWb.

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Electrical Machines
In shunt dc motor the direction of rotation of the motor will reversed. When

  only field terminals are changed.
  none of above.
  either field terminals are reversed or armature terminals are reversed.
  only armature terminals are reversed.

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Electrical Machines
For power factor improvement the synchronous motor is to be

 heavily loaded and underexcited
 heavily loaded and over excited
 lightly loaded and over excited
 lightly loaded and underecited

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Electrical Machines
Which type of motors uses slip rings?

 Synchronous motors
 DC Shunt Motor
 Induction motors
 Both Synchronous and Induction motor

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MORE MCQ ON Electrical Machines

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