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Three Phase Induction Motors

Three Phase Induction Motors
The shaft of an induction motor is made of

Carbon steel
Stainless steel
Cast iron
High speed steel

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Three Phase Induction Motors
A four speed squirrel cage induction motor uses______ stator windings.

One
Three
Two
Four

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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 run at reduced speed
The motor will burn
The motor will not run

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Three Phase Induction Motors
Less maintenance troubles are experienced in terms of

Slip ring induction motor
None of the listed here
Both squirrel cage and slip ring
Squirrel cage induction motor

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Three Phase Induction Motors
An induction motor is

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

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Three Phase Induction Motors
The magnetising current drawn by a 3 phase induction motor is about _______ of full load stator current.

30 to 50%
15 to 20 %
5%
10 to 15%

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