Question

What is the representative factor if the length of the drawing is 15mm and the actual length of the object is 3m?

(a) 1:2

(b) 1:0.2

(c) 1:200

(d) 1:20

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

This intriguing question originated from Representative Factor topic in section Scales of Engineering Drawing

Answer 1

Correct answer is (c) 1:200

Easy explanation: The representative factor is the ratio of a length of the drawing to the actual length of an object. Hence for the line of length 15mm and the actual length 3m, R.F. = 15 ÷ 3000 = 1:200. The units of both the quantities should be same.