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Three Phase Induction Motors

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

Three
Two
Four
One

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

Carbon steel
Stainless steel
High speed steel
Cast iron

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

None of these
Shaft
Bearings
Stator core

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

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

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Three Phase Induction Motors
In induction motor, percentage slip depends on

Copper losses in motor
None of these
Supply frequency
Supply voltage

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Three Phase Induction Motors
When a 3-phase induction motor is at no load, the slip is ______

0.2
1
0.5
Practically zero

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