Engineering Graphics

Line Parallel to VP and Perpendicular to HP When the line is parallel to VP and perpendicular to HP, its front view is perpendicular to x-y and shows true length. Its top view is a point view (PV) Consider a line CD perpendicular to HP and parallel to VP as shown in Figure Its front view c’d’ will be perpendicular to x-y line with true length l. Its top view cd will be a point view.   Line Parallel to HP and Perpendicular to VP When the line is parallel to HP and perpendicular to VP, its front view is point view and top view is a line of true length perpendicular to x-y. Consider a line PQ of length l parallel to HP and perpendicular to VP as shown in Figure 4 ‑ 6 . Top view pq will be perpendicular to x-y with true length l. Front view p’q’ will be a point view. Examples A line CD of length 50 mm is perpendicular to HP and parallel to VP . Its end C is 10 mm above HP and 15 mm in front of VP . Draw the projec

When the line is parallel to both HP and VP, its front view and top view are parallel x-y and show true length.   Let us consider a line AB of length l , parallel to HP and VP as shown in Figure .   Let the distance of line from HP and VP is h and w respectively. As the line is situated in first quadrant, its front view will be above x-y and top view below it.   Line is parallel to both HP and VP, therefore both front view and top view will parallel to x-y with the length l (TL). Example A line AB of length 50 mm is parallel to both HP and VP. The line is 15 mm above HP and 20 mm in front of VP. Draw its projections.