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Three Phase Induction Motors

Three Phase Induction Motors
When a 3-phase induction motor is at no load, the slip is ______

0.5
Practically zero
1
0.2

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Three Phase Induction Motors
The torque developed in the cage induction motor with auto-starter is

K2 × torque with direct switching
k/torque with direct switching
K × torque with direct switching
k2/torque with direct switching

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Three Phase Induction Motors
The rotor winding of a 3phase wound rotor induction motor is generally _______ connected.

Delta
None of the listed here
Star
Partly star and partly delta

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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
In a 3 phase induction motor, the rotor speed is _____ the synchronous speed.

None of the listed here
Equal to
Greater than
Smaller than

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

0.04 %
0.4 %
14%
4 %

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