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Three Phase Induction Motors

Three Phase Induction Motors
The maximum torque in an induction motor depends on

Frequency
Square of supply voltage
All of the listed here
Rotor inductive reactance

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Three Phase Induction Motors
When the rotor of a 3-phase induction motor is blocked, the slip is _____

0.5
0.1
0
1

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Three Phase Induction Motors
The condition of induction motor on load resemble those of a transformer whose secondady is _______

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

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

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

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Three Phase Induction Motors
In a squirrel cage induction motor, the number of rotor bars is generally ________

Even number
Prime number
Equal to stator poles
None of the listed here

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