Question

What is important in testing a tapered job?

(a) Check the diameter at smaller end

(b) Change of diameter per unit mass

(c) Change in length per unit weight

(d) Change of diameter per unit length

I have been asked this question in examination.

Question is from Gauges for Tapers in section Limits, Fits and Gauges of Engineering Metrology

Answer 1

Right choice is (d) Change of diameter per unit length

To elaborate: Taper plug and ring gauges are used to test tapers. A taper has two ends, one of bigger diameter and other of smaller diameter. To test a tapered job it is important to check the bigger diameter and also the change of diameter per unit length.