Question

What is the condition for a positive upper deviation?

(a) Maximum limit of size > basic size

(b) Maximum limit of size is < basic size

(c) Minimum limit of size > basic size

(d) Maximum limit of size < basic size

The question was posed to me in an interview.

My question is from Terminology topic in chapter Limits, Fits and Gauges of Engineering Metrology

Answer 1

Right choice is (a) Maximum limit of size > basic size

The best I can explain: Upper deviation is positive when maximum limit of size > its basic size and negative when maximum limits size < basic size. For lowers deviations, it is a positive quantity when minimum limit size is more than its corresponding basic size.