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Which of the following is incorrect about tolerances?

(a) Too loose tolerance results in less cost

(b) Tolerance is a compromise between accuracy and ability

(c) Too tight tolerance may result in excessive cost

(d) Fit between mating components is decided by functional requirements

I got this question in an international level competition.

This is a very interesting question from Tolerances in portion Limits, Fits and Gauges of Engineering Metrology

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Right answer is (a) Too loose tolerance results in less cost

Explanation: Loose tolerance results in increase in cost, assembly problems and poor performance of the product. Tight tolerance results in unnecessary machining and inspection time.

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