Technical Drawing 3, WASSCE (PC 2ND), 2019

Question 1

 

       

 

Fig. 1 shows two views of a casting in first angle projection. Make a freehand isometric drawing of the casting making point S the lowest.

 

Observation

 

 

Candidates were given two views of a casting in first angle orthographic projection and were expected to draw it in freehand isometric sketch using pencil and eraser only.

Most of the candidates attempted this question and their performance was okay.

However some of the candidates did not make X the lowest point.


Candidates were expected to do the following:

 

Freehand Isometric drawing of the Casting

i. Sketch the casting in isometric;
ii Make S the lowest point;       
iii. Draw for resemblance;                                    
iv. Draw to proportion;                         
v. Sketch faces A, B, C, D, E, F, G, H& J;                                  
vi. Drasketch neatly;                                               

                                  

The solution is shown below:

                       

Freehand Sketch of the Block