Question

Which of the lines is a thin continuous line with the ends terminating in arrowheads and is enclosed by extension lines, outlines or centre lines?

(a) Dimension line

(b) Leader line

(c) Extension line

(d) Section line

I have been asked this question by my school teacher while I was bunking the class.

My enquiry is from Terminology of Dimensioning topic in section Lines, Lettering and Dimensioning of Engineering Drawing

Answer 1

The correct option is (a) Dimension line

The best explanation: The dimension line is a thin continuous line with the ends terminating in arrowheads and is enclosed by extension lines, outlines or centre lines. The dimension figures are written on the top of the dimension line or aligned at the centre of the dimension line according to the system of dimensioning.