The document provides steps to solve a problem involving projecting a 100mm line AB onto a horizontal and vertical plane. The front view of the line is inclined at 40 degrees to the horizontal plane. The problem is to draw the projections of the line, find the inclinations to the two planes, and locate the traces, given the end points A and B and a projector distance of 60mm between them. The steps involve drawing the projections of the end points, connecting them to form the projected line, measuring the inclinations, and drawing the traces.

1. Engineering Graphics
Unit 1: Projections of Line

2. Problem Statement (Phase I- 2013) :-
The end point A of 100 mm long line AB is in HP and
its another end point B is in VP. The front view of line
is inclined at an angle of 400 to HP. Draw the
projections of line , if the projector distance between
the end points of a line is 60 mm. Find the inclinations
made by the line with HP and VP. Locate the traces of
line.
Given Data:-
1. a’= on XY
2. b = on XY
3. TL= 100 mm
4. α = 400
5. Projector distance, PD = 60 mm

3. Draw XY line and locate projection of points a’Step 1

4. Take projector distance from point a’ = 60 mm and locate point b on XYStep 2

5. Draw a line a’b’ at an angle of α = 400
upto projector line b
Step 3

6. Draw a line from point b’ which is parallel to XY
From point a’ take a distance 100 mm which intersect locus of line b’
Step 4

7. Take a distance a’b’ and draw an arc on XY line which gets b2
Take a distance 100 mm put on point b2 and mark point a which
is located on the projector lines of a’
Step 5

8. Step 6 Join line ab = PL, and measure θ and ɸ

9. Step 7
Draw a traces :
HT extend a’b’on XY line from that draw projector which cuts ab
VT extend abon XY line from that draw projector which cuts a’b’