Question

Up to which comparator measurements, dial indicator of bench micrometer can be used?

(a) 1 micron

(b) 2 micron

(c) 3 micron

(d) 4 micron

This question was posed to me during a job interview.

Question is taken from Bench Micrometer in chapter Linear Measurements of Engineering Metrology

Answer 1

Correct answer is (a) 1 micron

To explain I would say: A super precision dial indicator is used for comparator measurement. Micrometer head is also highly précised with direct readings in 25 mm units.