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Electrical Machines

Electrical Machines
In single phase rotary converter the number of slip rings will be

 six.
 two.
 three.
 four.

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Electrical Machines
The function of field regulator in a DC compound motor is to

 control field current.
 vary the armature resistance.
 limit the armature current.
 none of above.

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Electrical Machines
The rotor slots are slightly skewed in squirrel cage induction motor to

 reduce the magnetic hum and locking tendency of rotor.
 increase the strength of rotor bars.
 provide ease of fabrication.
 decrease the amount of copper to be used.

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Electrical Machines
The rotor electromotive force of the IM is observed to make 100 complete alterations per minute, calculated slip

  3.33 %.
 0 .001 %.
None of these
 3 %.

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Electrical Machines
Poles of DC machine are often laminated to

 reduce armature reaction.
 reduce pulsation loss.
 reduce iron weight.
 dissipate more heat.

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Electrical Machines
Which motor cannot be started on no load?

 cumulative compound motors
 shunt motors
 series motors
 both B and C

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MORE MCQ ON Electrical Machines

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