Question

What are the two parts of the Vernier scale?

(a) Primary scale and secondary scale

(b) Plain scale and comparative scale

(c) Vernier scale and secondary scale

(d) Primary scale and Vernier scale

This question was posed to me in an online quiz.

Question is from Types of Scales topic in division Scales of Engineering Drawing

Answer 1

Right choice is (d) Primary scale and Vernier scale

For explanation I would say: The Vernier scale consists of two parts. They are the primary scale and the Vernier scale. Vernier scale is used to read very small dimensions with great accuracy. The Vernier part of the scale is derived from the primary scale.