top view and front view of line AB 70mm long measure 55mm and 60mm respectively.Draw its projection if end A is 15mm above HP and 20mm in front of DP determine it's inclination with HP and VP
Answers
Answer:
Top View = ab = 55 mm
Front View = a’b’ = 60 mm
TL = a’b1’ = ab2 = 70 mm
a’ (↑) = 15 mm
a (→) = 20 mm
Top View = Plan Length = ab1 = 55 mm
Front View = Elevation Length = a’b2’ = 60 mm
Follow the procedure given below step by step to draw the projection of line –
Draw XY line.
Mark a’ and a at 15 mm above XY line and 20 mm below XY line respectively.
Draw horizontal line (Locus of a’ and a) from a’ and a respectively.
Mark EL (a’b2’) at 60 mm from point a’ on the horizontal line passing through a’ (locus of a’).
Mark PL (ab1) at 55 mm from point a on the horizontal line passing through a (locus of a)
Take the projection of b2’ into TV (Draw a vertical line from point b2’).
Take the projection of b1 into FV (Draw a vertical line from point b1).
TL is given in the problem, taking TL (70 mm) as radius and a’ as centre cut the vertical line passing through b1, mark that point b1’.
Join a’b1’ (TL).
Draw the locus of b’ (Horizontal line passing through b1’).
Taking TL (70 mm) as radius and a as centre cut the vertical line passing through b2’, mark that point b2.
Join ab2 (TL).
Draw the locus of b (Horizontal line passing through b2).
Taking a’ as center and a’b2’ as radius draw an arc which will cut the horizontal line passing through b1’