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Three Phase Induction Motors

Three Phase Induction Motors
In a double squirrel cage induction motor, the outer cage winding has _______

High resistance
None of the listed here
Low resistance
High inductance

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

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

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Three Phase Induction Motors
Insertion of resistance in the rotor of an induction motor to develop a given torque

Decreases the rotor current
Increases the rotor current
Rotor current becomes zero
Rotor current remains same

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Three Phase Induction Motors
Less maintenance troubles are experienced in terms of

Squirrel cage induction motor
Slip ring induction motor
Both squirrel cage and slip ring
None of the listed here

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Three Phase Induction Motors
In medium sized induction motor, the slip is generally around

0.04 %
14%
0.4 %
4 %

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Three Phase Induction Motors
A four speed squirrel cage induction motor uses______ stator windings.

Four
Two
Three
One

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