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Three Phase Induction Motors

Three Phase Induction Motors
Slip rings are usually made of

Carbon
Aluminium
Copper
Phospor bronze

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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

Same
Smaller
Bigger
Any of the listed here

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Three Phase Induction Motors
The maximum torque of a 3-phase induction motor under running conditions is

None of the listed here
Inveresly proportional to supply voltage
inversely proportional to rotor reactance at standstill
Directly proportional to rotor resistance

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Three Phase Induction Motors
The air gap between stator and rotor of 3-phase induction motor ranges from ______

0.4 mm to 4 mm
2 cm to 4 cm
1 cm to 2 cm
4 cm to 6 cm

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Three Phase Induction Motors
An induction motor is so called because its operation depends on

Self induction
Mutual induction
Eddy currents
Hysteresis

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

High resistance
High inductance
Low resistance
None of the listed here

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MORE MCQ ON Three Phase Induction Motors

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