Question

In _________a point of the object is represented by three coordinates, x, y and z.

(a) axonometric projection

(b) cavalier projection

(c) cabinet projection

(d) military projection

The question was posed to me during an interview.

This is a very interesting question from Oblique Projection in chapter Development of Surfaces, Isometric Projections, Perspective Projections & Transformation of Projections of Civil Engineering Drawing

Answer 1

Right option is (b) cavalier projection

The explanation is: In cavalier projection (sometimes cavalier perspective or high view point) a point of the object is represented by three coordinates, x, y and z. On the drawing, it is represented by only two coordinates, x″ and y″. On the flat drawing, two axes, x and z on the figure, are perpendicular and the length on these axes are drawn with a 1:1 scale; it is thus similar to the dimetric projections, although it is not an axonometric projection, as the third axis, here y, is drawn in diagonal, making an arbitrary angle with the x″ axis, usually 30 or 45°. The length of the third axis is not scaled.