Technical Drawing 3, WASSCE (SC), 2018

Question 5

 

Figure 3 shows the detail of a pulley bracket assembly.  Part R is held between the arms of the bracket by the pin S with the point of entry from right to the left.

Draw full size, in first angle projection, the following views of the assembled pulley bracket:

(a)        end view;

(b)        sectional view in the direction of X – X.

Show all hidden details on the front elevation only.

 

 

Observation

 

A detailed pulley bracket assembly was given and candidates were expected to draw full size, in first angle projection the end view, sectional view in the direction of X – X, showing hidden details on the front elevation only.

Very few candidates attempted this question.  However, the performance was okay.

Candidates were expected to:

END VIEW

i.          draw in first angle projection;            
ii          draw the outline;
iv.        draw (4) centre lines;
v.         draw part A in place;
vi.        draw part B in place;
vii.       draw part C in place;
viii.      draw the cutting plane;

ix.        draw the end of pin D;
x.         show  2 – hidden holes;
xi.        show the bottom of vee in hidden;
xii.       show the head of pin in hidden;
xiii.      show the bottom of groove in part A in hidden.

SECTION ON PLANE X - X

i.          draw in first angle projection;
ii          draw full size;
iii.        draw the outline;
iv.        draw (4) centre lines;
v.         draw part A (base);
vi.        draw part B  (pulley;)
vii.       draw part C (pin head);
viii.      draw part D (pin);
ix.        draw pin hole in hidden;
x.         show (2) holes in hidden;
xi.        section the bracket.