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Three Phase Induction Motors

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

0.04 %
0.4 %
4 %
14%

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Three Phase Induction Motors
If the rotor slots are made deeper, rotor resistance is ______

Increased at starting
None of the listed here
Increased under running conditions
Decreased at starting

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

1
0.2
Practically zero
0.5

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Three Phase Induction Motors
The shaft of an induction motor is made of

Cast iron
Stainless steel
Carbon steel
High speed steel

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Three Phase Induction Motors
The complete circle diagram of induction motor can be drawn with the help of data found from

Blocked rotor test
All of these
No-load test
Stator resistance test

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

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

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