Question

The increase in hardness is shown by the value of the figure put in front of the letter H, 2H, 3H, and 4H etc.

(a) True

(b) False

The question was asked by my college professor while I was bunking the class.

I'd like to ask this question from Drawing Tools and their Uses in chapter Drawing Instruments, Sheet Layout & Free-Hand Sketching of Engineering Drawing

Answer 1

The correct option is (a) True

To explain I would say: Letters HB denote the medium grade where the increase in hardness is shown by the value of the figure put in front of the letter H, viz. 2H, 3H, and 4H etc. Similarly, the grade becomes softer according to letter B, 2B, 3B and 4B etc.