Engineering Graphics and Design (3110013)

BE | Semester-1   Winter-2019 | 09-01-2020

Q3) (a)

What is the difference between a First Angle and Third Angle projection ?

First Angle Projection Method Third Angle Projection Method
An object is kept in the first quadrant. An object is kept in the third quadrant.
The object lies between the observer and the plane of projection. plane f Projection o lies between the observer and the object.
The plane of projection is assumed to be non-transparent. The plane of projection is assumed to be transparent.
Front (Elevation) view is drawn above the XY line. The front (Elevation) view is drawn below the XY line.
The Top (Plan) view is drawn below the XY line. The Top (Plan) view is drawn above the XY line.
Left View is projected on the right plane and vice versa. Left View is projected on the left plane itself.
Followed in India and European countries. Followed in the USA.