Question

The traces of plane are not intersecting at xy reference line then the plane is __________

(a) inclined to H.P and perpendicular to V.P

(b) parallel to H.P and perpendicular to V.P

(c) perpendicular to both reference planes

(d) inclined to V.P and perpendicular to H.P

I got this question by my college director while I was bunking the class.

The question is from Basics of Planes topic in section Projection of Planes of Engineering Drawing

Answer 1

Right choice is (b) parallel to H.P and perpendicular to V.P

The explanation is: When a plane has two traces, they, produced if necessary, intersect in xy except when both are parallel to xy reference line as in case of some oblique planes. And in those some specific are plane parallel to one reference and perpendicular to other.