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THREE PHASE INDUCTION MOTORS

Three Phase Induction Motors
The advantage of wound rotor motor is that _______

It requires less maintenance
None of the listed here
It is inexpensive
External resistance can be inserted in the rotor circuit

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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
The shaft of induction motor is made of

Hollow
Stiff
Flexible
Any of the listed here

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

Alternating
None of the listed here
Steady
Rotating

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Three Phase Induction Motors
An induction motor is preferred to a dc motor because it _______

Provides high starting torque
Provides fine speed control
None of the listed here
Has simple and rugged construction

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