Question

Which of the following is not true in case of Oblique Projections?
1. Parallel projection rays are not perpendicular to the viewing plane.
2. Parallel lines in space appear parallel on the final projected image.
3. Used exclusively for pictorial purposes rather than formal working drawings.
4. Projectors are always perpendicular to the plane of projection.

Answer 1

Correct Answer - Option 4 : Projectors are always perpendicular to the plane of projection.

The correct answer is option 4.

Statement I: TRUE
Parallel projection rays are not perpendicular to the viewing plane.
In an oblique projection, the parallel projection rays are not perpendicular to the viewing plane.
Statement II: TRUE
Parallel lines in space appear parallel on the final projected image.
In an oblique projection, Parallel lines in space appear parallel on the final projected image.
Statement III: TRUE
Used exclusively for pictorial purposes rather than formal working drawings.
In an oblique projection, Used exclusively for pictorial purposes rather than formal working drawings.
Statement IV: FALAE
Because in orthographic projection, the projectors are parallel to each other and also perpendicular to the plane but in oblique projection, the projectors are inclined to the plane of projection and projectors are parallel to each other.
∴ Hence the correct answer is Projectors are always perpendicular to the plane of projection.