Question

Which of the following is not a valid representative factor?

(a) 1:2

(b) 1:3

(c) 2:5

(d) 0:4

This question was posed to me in examination.

I want to ask this question from Representative Factor in section Scales of Engineering Drawing

Answer 1

Right option is (d) 0:4

To elaborate: The representative factor cannot be zero. As the length of the drawing cannot be zero, having a value zero means that there is no drawing made. Representative factors are used to scale down or up the drawing from the actual object.