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Three Phase Induction Motors

Three Phase Induction Motors
Which of the following component is usually fabricated out of silicon steel?

Shaft
None of these
Stator core
Bearings

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

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

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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
If an induction motor is running at slip S, then rotor output is ______

(S-1) × rotor input
(1+S) × rotor input
(1-S) × rotor input
S × rotor input

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Three Phase Induction Motors
If any two phases for an induction motor are interchanged

The motor will run in reverse direction
The motor will run at reduced speed
The motor will not run
The motor will burn

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Three Phase Induction Motors
The number of slip rings on a squirrel cage induction motor is usually

Two
None
One
Three

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