Question

What is the accuracy range when Graduated scales are used with micrometer microscope?

(a) ±1 micron

(b) ±1/2 of a micron

(c) ±1/4^th of a micron

(d) ±3/4^th of a micron

The question was posed to me in an internship interview.

The doubt is from Graduated Scales topic in division Linear Measurements of Engineering Metrology

Answer 1

Correct answer is (c) ±1/4^th of a micron

To explain I would say: Use of microscope micrometer increases the accuracy of graduated scales. ±1/4^th of a micron is the accuracy range when Graduated scales are used with micrometer microscope.