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Three Phase Induction Motors

Three Phase Induction Motors
In the circle diagram for induction motor, the diameter of the circle represents

Running torque
Slip
Line voltage
Rotor current

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Three Phase Induction Motors
The induction motor has lagging power factor during

Operation only
Starting only
Both starting and operation
None of the listed here

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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 run in reverse direction
The motor will not run

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

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

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Three Phase Induction Motors
For higher efficiency of 3-phase induction motor, the slip should be

Very large
As small as possible
1
Large

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Three Phase Induction Motors
In a 3 phase induction motor, the rotor speed is _____ the synchronous speed.

Greater than
Smaller than
Equal to
None of the listed here

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