Question

What is the length of the scale, the representative fraction is 1:50000 and the scale must measure up to 25 km?

(a) 5 x 10^-4 cm

(b) 50 cm

(c) 5 cm

(d) 0.5 cm

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

I need to ask this question from Types of Scales in section Scales of Engineering Drawing

Answer 1

Correct choice is (b) 50 cm

For explanation: The formula for calculating the length of the scale is given by, Length of the scale = R.F. x maximum length to be measured; Hence length of the scale = 1 ÷ 50000 x 25 x 1000 x 100 = 50 cm. It is very important to note the units while calculating.