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Three Phase Induction Motors

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

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

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

Stainless steel
Carbon steel
High speed steel
Cast iron

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Three Phase Induction Motors
The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase.

None of the listed here
Four times
Equal to
Two times

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Three Phase Induction Motors
A 3 phase induction motor is ________

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

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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
Size of a high speed motor as compared to low speed motor for the same HP will be

Bigger
Any of the listed here
Smaller
Same

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