Solved Numericals of Engineering Drawing – ED 22 Solved Questions

Q8: A tripod stand rests on H.P. One of its legs A.P. is 140 mm long and it makes an angle of 75⁰ with H.P. The other two legs BQ and CR are 150 mm and 160 mm long respectively. The upper ends of all the three legs A, B, and C are attached to a horizontal circular plate of 60 mm diameter. The attachment is done to the circumference of the circle dividing it equally.

In plan, three legs appear as radial lines 40⁰ apart with a plan of the legs appearing perpendicular to V.P. Draw the projections of the complete tripod stand and find an angle of the other two legs with H.P. Also find the height of the horizontal circular plate from H.P.

Solution:    AP = 140 mm

BQ = 150 mm

CR = 160 mm

Here, pa PA₁

cr = cr₁

bq = bq₁

By measurement

 h= 136 mm

Alpha = 66⁰

Beta = 58⁰