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Three Phase Induction Motors

Three Phase Induction Motors
In an induction motor, no load the slip is generally

2%
Less than 1%
4%
1.5 %

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

High speed steel
Cast iron
Stainless steel
Carbon steel

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Three Phase Induction Motors
The efficiency of an induction motor can be expected to be nearly

80 to 90%
95 to 98 %
60 to 90%
99%

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Three Phase Induction Motors
In an induction motor the relationship between stator slots and rotor slots is that

Stator slots are exact multiple of rotor slots
Stator slots are equal to rotor slots
None of the listed here
Stator slots are not exact multiple of rotor slots

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Three Phase Induction Motors
Friction and windage loss of a 3 phase induction motor are

Remains the same at all loads
None of the listed here
Minimum at no load
Maximum at no load

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

0.04 %
0.4 %
4 %
14%

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MORE MCQ ON Three Phase Induction Motors

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