Question

Why rotatable bevels are used in dial indicators?

(a) Facilitate the work of machine setting

(b) Acts as an offset attachment

(c) Prevent shocks

(d) For making final zero setting

The question was posed to me in an interview.

My doubt stems from Working Mechanism of Dial Indicators topic in portion Dial Indicators and Indicating Gauges of Engineering Metrology

Answer 1

Correct answer is (d) For making final zero setting

Best explanation: Most of the dial indicators include a rotatable bezel. Rotatable bezel is used to make the final zero setting at any position in the full circle. A clamp is also provided for locking it in any position.