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Three Phase Induction Motors

Three Phase Induction Motors
The term cogging is associated with

Dc series motors
Three phase transformer
Compound generators
Induction motors

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Three Phase Induction Motors
The stator of a three phase induction motor produces _______ magnetic field.

None of the listed here
Rotating
Steady
Alternating

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Three Phase Induction Motors
At starting of a double squirrel cage induction motor _______

Outer cage winding has good pf
Lower cage winding has low reactance
Lower winding is more effective
None of the listed here

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Three Phase Induction Motors
The condition of induction motor at no load resemble those of a transformer whose secondady is _______

None of the listed here
Open circuited
Supplying a variable resistive load
Short-circuited

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Three Phase Induction Motors
The crawling in an induction motor is caused by

High loads
Harmonics developed in the rotor
Improper design of machine
Low voltage supply

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Three Phase Induction Motors
In an induction motor if air gap increased

The power factor will be low
Bearing friction will reduce
Windage losses will be more
Copper loss will reduce

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MORE MCQ ON Three Phase Induction Motors

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