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Which grade of pencil is used for drawing arrowheads?(a) 2H(b) 2B(c) 7H(d) HThis question was addressed to me in homework.My doubt is from Lines, Lettering and Dimensioning topic in portion Lettering Practice, Scales & Curves of Civil Engineering Drawing

Answer»

Correct option is (a) 2H

Explanation: Arrowheads RESEMBLES the EXTENT of dimensions. It should be sharply DEFINED and uniform throughout the drawing. Generally, 3 MM in length is used. For such precision small diameter pencils are used, hence 2H is used as arrowheads.



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