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Three Phase Induction Motors

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

Infinity
Large
Absent
Small

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Three Phase Induction Motors
The stator of a three phase induction motor produces _______ magnetic field.

Alternating
Steady
Rotating
None of the listed here

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Three Phase Induction Motors
For the same kVA rating, the leakage flux in induction motor is _______ that of transformer.

More than
About the same
None of the listed here
Less than

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Three Phase Induction Motors
The rotor winding of a 3phase wound rotor induction motor is generally _______ connected.

Partly star and partly delta
None of the listed here
Delta
Star

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Three Phase Induction Motors
In an induction motor the relationship between stator slots and rotor slots is that

Stator slots are exact multiple of rotor slots
Stator slots are not exact multiple of rotor slots
None of the listed here
Stator slots are equal to rotor slots

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Three Phase Induction Motors
Very large 3-phase induction motors (greater than 25 HP) are started _____

Star-delta starting
Direct on line
By auto transformer starting
None of the listed here

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