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Three Phase Induction Motors

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

Squirrel cage induction motor
Both (A) and (B)
Slip ring induction motor
None of these

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Three Phase Induction Motors
The rotor of an induction motor runs at

Any of the above
Above synchronous speed
Synchronous speed
Below synchronous speed

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Three Phase Induction Motors
The starting torque of a 3-phase induction motor is _______ supply voltage.

Directly proportional to sqaure of
Independent of
None of the listed here
Directly proportional to

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Three Phase Induction Motors
In a squirrel cage induction motor, the number of stator slots is _______ rotor slots.

Always less than the number of
Always greater than the number of
Always eqaul to the number of
Either more or less than the number of

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

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

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Three Phase Induction Motors
The shape of the torque/slip curve of induction motor is

Parabola
Hyperbola
Rectangular parabola
Straight line

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