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In ____________ the direction of viewing is such that two of the three axes of space appear equally foreshortened.(a) orthographic projection(b) trimetric projection(c) dimetric projection(d) isometric projectionThis question was addressed to me in semester exam.The question is from Projections on Auxiliary Planes topic in chapter Orthographic Projection, Projections of Lines, Planes and Solids of Civil Engineering Drawing

Answer»

Right option is (b) trimetric PROJECTION

To explain I would say: In dimetric projection, the direction of viewing is such that two of the THREE axes of SPACE appear equally foreshortened, of which the attendant scale and angles of presentation are determined ACCORDING to the angle of viewing; the scale of the third direction (vertical) is determined separately. Approximations are common in dimetric drawings.



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