Technical Drawing 2, WASSCE (SC), 2021

Question 3

 

(a)        Construct an involute to circle R20, starting from the lowest point of
            the circle and in a clockwise direction.

(b)       Draw a tangent to the involute in 3(a) at point, P, which is located on the involute at 70 to the right of the vertical centre line.

 

Observation

 

Almost all candidates attempted this question. Their performance was very good.