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Three Phase Induction Motors

Three Phase Induction Motors
Which of the following component is usually fabricated out of silicon steel?

Bearings
Shaft
Stator core
None of these

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Three Phase Induction Motors
An induction motor with 1000 r.p.m. speed will have

6 poles
4 poles
8 poles
2 poles

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Three Phase Induction Motors
DOL starting of induction motors is usually restricted to

Low horsepower motors
Variable speed motors
High speed motors
High horsepower motors

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Three Phase Induction Motors
The number of slip rings on a squirrel cage induction motor is usually

Three
Two
One
None

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Three Phase Induction Motors
The condition of induction motor at no load resemble those of a transformer whose secondady is _______

Open circuited
None of the listed here
Supplying a variable resistive load
Short-circuited

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

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

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