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Three Phase Induction Motors

Three Phase Induction Motors
The term cogging is associated with

Three phase transformer
Compound generators
Induction motors
Dc series motors

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Three Phase Induction Motors
In medium sized induction motor, the slip is generally around

14%
4 %
0.04 %
0.4 %

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Three Phase Induction Motors
In a squirrel cage induction motor, the number of stator slots is _______ rotor slots.

Either more or less than the number of
Always greater than the number of
Always less than the number of
Always eqaul to the number of

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

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

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Three Phase Induction Motors
An induction motor is

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

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Three Phase Induction Motors
Very large 3-phase induction motors (greater than 25 HP) are started _____

None of the listed here
Direct on line
Star-delta starting
By auto transformer starting

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