Observation

This is a question involving drawing an auxiliary plan from two given views in a certain direction of view.

Many of the candidates attempted this question but very few got it right.

Candidates were expected to do the following:

AUXILIARY PLAN
A.        COPYING THE GIVEN VIEWS
(i)         draw the incomplete plan ;
(ii)        project from the plan to draw the front elevation;
(iii)       draw the front elevation (2 vertical, 2 horizontal, 1 slant);   
(iv)       ndicate the direction of view.

B.        CONSTRUCTION ON THE COMPLETE PLAN
(i)        complete the plan;
(ii)        divide the circle into 12 equal parts;
(iii)       draw horizontal lines from the divisional points on the circumference of the circle to draw vertical coordinates;
(iv)       hatch the cut surface on the plan.

C.        DRAWING THE AUXILIARY PLAN

(i)        project up lines from the circle in the plan to the front elevation;
(ii)        draw the auxiliary lines from the front elevation in the direction of arrow R;

(iii)       draw reference line OO1 perpendicular to the auxiliary lines;
(iv)       replicate the coordinates on the reference line in item iii;
(v)        transfer corresponding distances from the plan to locate the points for the auxiliary elevation.