Question

The scale used in micrometer is _____________

(a) Plain scale

(b) Comparative scale

(c) Diagonal scale

(d) Circular vernier scale

I have been asked this question by my college director while I was bunking the class.

This intriguing question comes from Types of Scales in portion Scales of Engineering Drawing

Answer 1

The correct answer is (d) Circular vernier scale

To explain: The circular vernier uses the principle of the vernier. The circular vernier is used in surveying instruments to measure angle to the required accuracy. In the case of mechanical engineering, it is used in measuring instruments like a micrometer.