Question

If a clearance fit is present between shaft and hole, what is the tolerance on shaft or hole for a complete interchangeable approach?

(a) ½ of maximum clearance – ½ of minimum clearance

(b) ¼ of maximum clearance – ¼ of minimum clearance

(c) Maximum clearance – minimum clearance

(d) ¾ of maximum clearance – ¾ of minimum clearance

This question was posed to me in an interview for job.

Query is from Tolerances in portion Limits, Fits and Gauges of Engineering Metrology

Answer 1

The correct option is (a) ½ of maximum clearance – ½ of minimum clearance

To elaborate: There are two approaches for deciding of tolerances and shafts i.e. statistical and complete interchangeable approach. There is no risk is taken about a single non-conforming assembly in complete interchangeable approach.