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Three Phase Induction Motors

Three Phase Induction Motors
Slip rings are usually made of

Carbon
Copper
Aluminium
Phospor bronze

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

Self induction
Mutual induction
Eddy currents
Hysteresis

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

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

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Three Phase Induction Motors
In a 3 phase induction motor, the rotor speed is _____ the synchronous speed.

Greater than
Smaller than
Equal to
None of the listed here

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Three Phase Induction Motors
5 H.P., 50Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest?

730 rpm
2880 rpm
1440 rpm
1000 rpm

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Three Phase Induction Motors
For the same kVA rating, the leakage flux in induction motor is _______ that of transformer.

About the same
More than
None of the listed here
Less than

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MORE MCQ ON Three Phase Induction Motors

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