Question

What is the maximum limit of TEI after which attention is required?

(a) 5% of the tolerance part

(b) 10% of the tolerance part

(c) 15% of the tolerance part

(d) 20% of the tolerance part

I had been asked this question at a job interview.

This interesting question is from Conditions of Comparison topic in portion Standards of Measurements of Engineering Metrology

Answer 1

Correct choice is (b) 10% of the tolerance part

To elaborate: If the TEI is > 10% of the part of tolerance, then attention is required. In close tolerance works, thermal effect is a single largest source of error. Efforts like applying correction and air conditioning doesn’t always solve the problem.