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Three Phase Induction Motors

Three Phase Induction Motors
In medium sized induction motor, the slip is generally around

0.4 %
4 %
0.04 %
14%

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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

Any of the listed here
Same
Bigger
Smaller

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

Full load
No load
Starting
Half full load

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Three Phase Induction Motors
The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______

40%
90%
None of the listed here
65%

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Three Phase Induction Motors
In a 3 phase induction motor, the rotor speed is _____ the synchronous speed.

None of the listed here
Smaller than
Equal to
Greater than

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Three Phase Induction Motors
Less maintenance troubles are experienced in terms of

None of the listed here
Slip ring induction motor
Squirrel cage induction motor
Both squirrel cage and slip ring

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