Question

While dimensioning a cylinder in the view where the true shape of the cylinder is not visible, which symbol is used to denote that it is a cylinder?

(a) •

(b) φ

(c) ϴ

(d) ○

The question was posed to me in semester exam.

My doubt is from Basic Principles in Dimensioning -1 topic in division Lines, Lettering and Dimensioning of Engineering Drawing

Answer 1

Correct option is (b) φ

For explanation: Since the true shape of the cylinder is a circle from one view, we used the symbol φ followed by the dimension figure while dimensioning it in the view where it is seen as a rectangle. The cross-section of the rectangle is square then the symbol • followed by the dimension figure is used.