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Three Phase Induction Motors

Three Phase Induction Motors
The shape of the torque/slip curve of induction motor is

Straight line
Parabola
Rectangular parabola
Hyperbola

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

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

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Three Phase Induction Motors
An induction motor is

Non self starting
Self starting with zero torque
Self starting with high torque
Self starting with low torque

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

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

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Three Phase Induction Motors
Slip rings are usually made of

Aluminium
Carbon
Phospor bronze
Copper

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Three Phase Induction Motors
In the circle diagram for induction motor, the diameter of the circle represents

Running torque
Slip
Rotor current
Line voltage

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MORE MCQ ON Three Phase Induction Motors

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