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_________ is used to draw curves which are not circular.

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_________ is used to draw curves which are not circular.

(a) Compass

(b) Protractor

(c) French curves

(d) Pro circle

This question was addressed to me during an internship interview.

Origin of the question is Drawing Tools and their Uses in chapter Drawing Instruments, Sheet Layout & Free-Hand Sketching of Engineering Drawing

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Right choice is (c) French curves

For explanation: French curves are used for drawing curves which can’t be drawn with a compass. A faint freehand curve is first drawn through the known points. Longest possible curves exactly coinciding with the freehand curve are then found out from the French curve. Finally, a neat continues curve is drawn with the aid of the French curve.

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