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Which of the following is correct for selective assembly?

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Which of the following is correct for selective assembly?

(a) Not suitable for industrial purposes

(b) Cost increases due to automatic gauging

(c) Wastage is high due to selective selection

(d) This method is followed in ball and roller bearing units

The question was asked during an interview.

This interesting question is from Interchangeability topic in chapter Limits, Fits and Gauges of Engineering Metrology

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Right answer is (d) This method is followed in ball and roller bearing units

Easy explanation: Selective assembly technique is widely used in industries. It is followed in automobile, air craft industries and in ball and roller bearing units. Tolerances desired in these industries are very narrow.

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