Engineering Graphics

2. X
Y
1ST Quad.
2nd Quad.
3rd Quad. 4th Quad.
X Y
VP
HP
Observer
THIS QUADRANT PATTERN,
IF OBSERVED ALONG X-Y LINE ( IN RED ARROW DIRECTION)
WILL EXACTLY APPEAR AS SHOWN ON RIGHT SIDE AND HENCE,
IT IS FURTHER USED TO UNDERSTAND ILLUSTRATION PROPERLLY.
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20. PROJECTION OF LINES
1. PARALLEL TO BOTH THE PLANES

23. 2. PROJECTION OF LINE PERPENDICULAR
TO H.P AND PARALLEL TO V.P

26. 3. PROJECTION OF LINE
PERPENDICULAR TO V.PAND PARALLEL
TO H.P

29. 3.PROJECTION OF LINE
INCLINED TO V.P AND
PARALLEL TO H.P

32. 4. PROJECTION OF LINE
INCLINED TO H.P AND
PARALLEL TO V.P

35. EX: LINE CONTAINED IN BOTH THE
PLANES

38. Engineering Graphics Lecture Notes
EXAMPLE PROBLEMS:-
I.DRAW THE PROJECTION OF A LINE PQ, 25 MM LONG IN
THE
FOLLOWING POSITIONS
1. Perpendicular to the H.P., 20 mm infront of V.P and its one end
15 mm above the H.P

40. EXAMPLE PROBLEMS:-
II. DRAW THE PROJECTION OF A LINE PQ, 25 MM
LONG IN THE FOLLOWING POSITIONS
1. Perpendicular to the V.P., 25 mm above the H.P and its
One end in the V.P

42. EXAMPLE PROBLEMS:-
III. Draw the projection of a 30 mm long AB,
straight line parallel to both H.P and V.P and 25
mm above H.P and 20 mm infront of V.P

44. EXAMPLE PROBLEMS:-
IV.Draw the projection of a 30 mm long AB,
straight line parallel to and 30 mm above H.P
and in the V.P

46. EXAMPLE PROBLEMS:-
5. Draw the projection of a straight line AB of 40 mm
length is parallel to the H.P and inclined at 30° to the
V.P. its end point A is 10 mm from the H.P and 15 mm
from the V.P