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Three Phase Induction Motors

Three Phase Induction Motors
The term cogging is associated with

Compound generators
Three phase transformer
Induction motors
Dc series motors

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Three Phase Induction Motors
An induction motor is

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

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Three Phase Induction Motors
A 3 phase 440 v, 50 Hz induction motor has 4% slip. The frequency of rotor emf will be

50 Hz
2 Hz
20 Hz
200 Hz

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Three Phase Induction Motors
The frame of an induction motor is usually made of

Aluminium
Bronze
Silicon steel
Cast iron

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Three Phase Induction Motors
A 3 phase induction motor is ________

Not easily maintainable
Essentially a constant speed motor
Very costly
A variable speed motor

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Three Phase Induction Motors
3-phase wound rotor morors are also called _____ motors.

Synchronous
Series
Commutator
Slip ring

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MORE MCQ ON Three Phase Induction Motors

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