Technical Drawing 3, WASSCE (SC), 2019

Question 1

Figure 1 shows the third angle orthographic projection of a Vee-block. Make freehand isometric drawing of the block making X the lowest point.

 

Observation

Candidates were asked to make a freehand isometric drawing of a Vee block making
X, the lowest point from the orthographic projection views given.  Majority of the
candidates were able to sketch the block correctly but some could not draw the isometric
view correctly.

Candidates were expected to:

FREEHAND SKETCH
(i)         sketch the block in isometric;
(ii)        make X the lowest point ;
(iii)       draw to proportion;
(iv)       sketch all the visible faces;
(v)        sketch neatly.

 

 

The solution is shown below:

Freehand Sketch of the Block