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Three Phase Induction Motors

Three Phase Induction Motors
The full load slip of a 3-phase induction motor ranges from

None of the listed here
10 to 20 %
20 to 30 %
2 to 5 %

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Three Phase Induction Motors
The starting torque of a squirrel cage induction motor is

Same as full load torque
Slightly more than full load torque
Low
Negligible

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Three Phase Induction Motors
The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____

1200 rpm
600 rpm
1000 rpm
300 rpm

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Three Phase Induction Motors
In a double squirrel cage induction motor, the outer cage winding has _______

High inductance
None of the listed here
High resistance
Low resistance

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Three Phase Induction Motors
The power factor of an induction motor under no load conditions will be closer to

0.5 leading
Unity
0.2 leading
0.2 lagging

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Three Phase Induction Motors
If a 4 pole induction motor has a synchronous speed of 1500 rpm, then supply frequency is _____

None of the listed here
25 Hz
50 Hz
60 Hz

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