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A line AB has its one say B end in horizontal plane and vertical plane then horizontal trace and vertical trace will coincide in __________line.

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A line AB has its one say B end in horizontal plane and vertical plane then horizontal trace and vertical trace will coincide in __________line.

(a) xy reference

(b) vertical reference

(c) above xy reference

(d) below xy reference

This question was addressed to me in an internship interview.

My question comes from Traces of a Line topic in division Projection of Lines of Engineering Drawing

1 Answer

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Best answer
Right choice is (a) xy reference

The best explanation: Vertical reference will be line formed by profile plane and vertical plane. And if trace is above or below the xy reference line it would meet vertical or horizontal plane at only once. So if single end is going to meet both planes it would definitely be on xy reference line.

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