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Electrical Machines

Electrical Machines
Compensating winding is placed in the

 pole shoe
All of these
 main field
 armature core

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Electrical Machines
The power input to a 3 - φ induction motor is 60 kW and stator loss is 1 kW the rotor cu loss per phase is

  slip X 69 / 3.
  slip X 50 / 3.
 1.
  slip X 59 / 3.

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

 any of the above
 full load
 half load
 no load

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Electrical Machines
In a DC Motor 3 point starter is used to

 provide overload protection.
 limit the starting current to a safer value.
 all of above.
 provide protection against Low-Voltage.

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Electrical Machines
A large series motor is never started without some mechanical load on it because otherwise it will

 draw too much current.
 produce sparking at brushes.
 open fuse or circuit breaker.
 develop excessive speed and damage itself.

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Electrical Machines
Ward-Leonard control is basically a ___________ control method.

 Armature voltage control.
 Armature resistance control.
 Field control.
 Field diverter control.

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MORE MCQ ON Electrical Machines

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