Question

Which of the following option is incorrect for clearance fits?

(a) Shaft ‘a’ gives a large clearance

(b) Shaft ‘n’ is used for clearance fits

(c) Shaft ‘d’ can be used for loose pulleys

(d) Shaft ‘g’ is expensive to manufacture

This question was addressed to me in an online quiz.

Asked question is from Guide for Selection of Fits in division Limits, Fits and Gauges of Engineering Metrology

Answer 1

The correct choice is (b) Shaft ‘n’ is used for clearance fits

To elaborate: Shaft ‘n’ gives transition fit. It gives clearance to only extreme sizes. It is recommended for tight fits. Grades 5, 6 and 7 are available. Shafts a, b and c gives clearance fit. They all gives large clearance so they are not widely used.