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Three Phase Induction Motors

Three Phase Induction Motors
The 3- phase induction motor is so designed that the rotor should have ______ under running conditions.

Large slip
high resistance
High reactance
Low resistance

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Three Phase Induction Motors
The maximum torque in an induction motor depends on

Square of supply voltage
Rotor inductive reactance
All of the listed here
Frequency

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Three Phase Induction Motors
The full load slip of a 3-phase induction motor ranges from

10 to 20 %
None of the listed here
2 to 5 %
20 to 30 %

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Three Phase Induction Motors
The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase.

Four times
Two times
None of the listed here
Equal to

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

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

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Three Phase Induction Motors
The starting torque of a squirrel cage induction motor is

Same as full load torque
Low
Negligible
Slightly more than full load torque

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MORE MCQ ON Three Phase Induction Motors

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