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Three Phase Induction Motors

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

Any of the listed here
Hollow
Stiff
Flexible

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Three Phase Induction Motors
The reactance of the rotor circuit of a 3-phase induction motor is maximum at

Full load
Starting
Half full load
No load

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

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

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Three Phase Induction Motors
The direction of rotation of field in a 3 phase induction motor depends upon _____

Magnitude of supply voltage
Number of poles
Supply frequency
Phase sequence of supply voltage

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Three Phase Induction Motors
Friction and windage loss of a 3 phase induction motor are

Minimum at no load
None of the listed here
Maximum at no load
Remains the same at all loads

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Three Phase Induction Motors
The good power factor of an induction motor can be achieved if the average flux density in the air gap is

Large
Absent
Small
Infinity

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