3) When a line in perpendicular to a plane of projection its projection on that plan is?

4) In orthographic projection which view is drawn on the HP?

5) When a line is parallel to the plane of projection, the projection of the line on that plane will be.

6) When the projectors are parallel to each other and also perpendicular to the plane of projection, the projection is called

7) When straight lines which are drawn from various points on the contour of an object to meet a plane, those lines are called as