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Three Phase Induction Motors

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

Supply voltage
None of these
Supply frequency
Copper losses in motor

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Three Phase Induction Motors
One of the speeds of a 2 speed squirrel cage induction motor is 800 rpm. The other speed will be _____

1600 rpm
2400 rpm
400 rpm
1200 rpm

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

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

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

Running torque
Slip
Rotor current
Line voltage

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Three Phase Induction Motors
The complete circle diagram of induction motor can be drawn with the help of data found from

No-load test
Stator resistance test
All of these
Blocked rotor test

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Three Phase Induction Motors
A 3 phase induction motor is ________

Essentially a constant speed motor
Not easily maintainable
A variable speed motor
Very costly

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