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__________ is not an essential thing for free-hand sketching.

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__________ is not an essential thing for free-hand sketching.

(a) A soft-grade pencil

(b) French curves

(c) A soft rubber-eraser

(d) A paper in form of a sketch-book or a pad

I have been asked this question at a job interview.

My question is from Sheet layout, Types of Machine Drawing and Free-Hand Sketching topic in division Drawing Instruments, Sheet Layout & Free-Hand Sketching of Engineering Drawing

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Right choice is (b) French curves

Easiest explanation: French curves are used for drawing curves which cannot be drawn with a compass. Since we are just making a rough sketch of our drawing beforehand, for the actual drawing there is no need for French curves. The remaining are primary requirements to sketch any drawing.

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