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Three Phase Induction Motors

Three Phase Induction Motors
An induction motor is so called because its operation depends on

Eddy currents
Self induction
Hysteresis
Mutual induction

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Three Phase Induction Motors
If any two phases for an induction motor are interchanged

The motor will run in reverse direction
The motor will not run
The motor will run at reduced speed
The motor will burn

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

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

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Three Phase Induction Motors
The rotor winding of a 3phase wound rotor induction motor is generally _______ connected.

None of the listed here
Partly star and partly delta
Delta
Star

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Three Phase Induction Motors
Slip rings are usually made of

Phospor bronze
Carbon
Copper
Aluminium

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Three Phase Induction Motors
For higher efficiency of 3-phase induction motor, the slip should be

Large
Very large
1
As small as possible

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MORE MCQ ON Three Phase Induction Motors

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