Question

Which information is required to draw the perspective?

(a) Top View and Front View (or Side View of) the object

(b) Orientation and location of the object w.r.t the PPP

(c) Location of station point S w.r.t to PPP and GL

(d) Angle of projection

The question was asked during an internship interview.

I'm obligated to ask this question of Perspective Projection topic in division Development of Surfaces, Isometric Projections, Perspective Projections & Transformation of Projections of Civil Engineering Drawing

Answer 1

The correct answer is (d) Angle of projection

To elaborate: Top View and Front View (or Side View of) the object. Since the PPP lies between the observer and the object, third angle projection technique is used. Orientation and location of the object w.r.t the PPP. Location of station point S w.r.t to PPP and GL.

Normal practice for location of S is at the normal to the eye level for big objects like buildings and for small objects s is located at such a height that all the three dimensions of the objects are almost visible.