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Electrical Machines

Electrical Machines
A DC generator can be considered as

 rectifier.
 rotating amplifier.
 power pump.
 prime mover.

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Electrical Machines
The overall power factor of an on load transformer

 is always unity.
  depends on the power factor of the load.
 is always lagging.
 is always leading.

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Electrical Machines
The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is

 1, 3
 2, 3
 2, 4
 1, 4

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Electrical Machines
What is the full form of MNP?

  Magnetic field neutral plane.
  Magnetic neutral pole.
  Magnetic field neutral pole.
  Magnetic neutral plane.

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Electrical Machines
Example of double excited machine is

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

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

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

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MORE MCQ ON Electrical Machines

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