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Three Phase Induction Motors

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

Half full load
Starting
No load
Full load

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

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

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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

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

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

1
As small as possible
Large
Very large

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

Flexible
Stiff
Hollow
Any of the listed here

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Three Phase Induction Motors
3-phase wound rotor morors are also called _____ motors.

Commutator
Series
Synchronous
Slip ring

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