Question

What is the accuracy deviation of dial comparator bench micrometer when setting with gauge block?

(a) ≤2 µm

(b) ≥2 µm

(c) ≤1 µm

(d) ≥1 µm

The question was asked during an interview.

The above asked question is from Bench Micrometer in division Linear Measurements of Engineering Metrology

Answer 1

Correct answer is (c) ≤1 µm

Easy explanation: Use of gauge block increase accuracy of bench micrometer and its accuracy deviation is less than or equal to 1 µm.