Technical Drawing 2, WASSCE (PC 2ND), 2018

Question 3

 

        

 

Fig. 2 shows three views of a block. Draw the isometric view of the block making P the lowest point

 

Observation

 

 

Candidates were given three views of an object in 1st angle orthographic projection and were to convert the drawings into an isometric drawing while making a particular point the lowest point.  The essence of the lowest point is to make the drawing be presented in a particular form that would coincide with the given drawing.

 

Many candidates attempted this question and their performance was above average.

 

Strength: Candidates were able to:-

 

  1. use isometric axes;
  2. use correct isometric box;
  3. draw the faces A, B, C, D, E, F and I well.

 

Weakness:  Some of the candidates who attempted the question could not draw faces G, H and J properly.

Candidates were expected to do the following:

 

            ISOMETRIC VIEW

i. use isometric axes;
ii. make P the lowest point;
iii.use correct isometric box (L = 80, W = 80, H = 70);
iv. draw face A;  

 

  1. draw face B;
  2. draw face C;
  3. draw face D;

viii. draw face E;
ix. draw face F;
x. draw face G;
xi. draw face H;
xii. draw face I;
xiii .draw face J.

 

The solution is shown below: