Question

We need a scale which has to show dm, cm and mm. Which scale do you prefer?

(a) Diagonal scale

(b) Plain scale

(c) Vernier scale

(d) Comparative scale

This question was posed to me in an interview for job.

This interesting question is from Types of Scales in section Scales of Engineering Drawing

Answer 1

Right choice is (a) Diagonal scale

To explain: Diagonal scale is meant for drawing scales which represents 3 units. A diagonal scale is used when very minute distances to be measured. Small divisions of short lines are obtained by the principle of the diagonal scale.