KCSE 2011 Drawing and Design Paper 1 Questions with Marking Scheme

DRAWING AND DESIGN (449)

Drawing and Design Paper 1 (449/1)

SECTION A (40 marks)
Answer all the questions in this section on the answer sheets provided.

1.      
   1. State two requirements to be observed to avoid confusing the dimension lines with outlines in a drawing.(1 mark)
   2. Give two reasons why care must be taken when storing drawing instruments.(2 marks)
2.       
   1. State what an industrial training centre in Kenya is.(1 mark)
   2. State two factors to consider in order to produce quality drawing.(1 mark)
3.       
   1. State four ways through which design ideas are communicated.(2 marks)
   2. Sketch the convention for each of the following:
      1. circular tube;
      2. planed timber;
      3. switch;
      4. knurling.(2 marks)
4.            
   1. Give the composition of each of the following alloys:
      1. brass;
      2. Stainless steel.(2 marks)
   2. Figure 1 shows a machine component. (2 marks)
      
      Draw the section D-D.
5.            
   1.    
      1. Explain each of the following scales in relation to the size of the drawing and the actual object.
         1. 20:1
         2. 1:20
      2. Give a common example where each of the above scales would be used.(3 marks)
   2. For the template shown in Figure 2.
      
      Measure and dimension the following:
      1. the semi circle;
      2. the angle at point X.(2 marks)
6. Use labelled sketches to differentiate between one-point and two-point perspective drawings.(2 marks)
7. Figure 3 shows two views of a block drawn in first angle projection.
   
   Sketch in good proportion, the oblique view of the block.(3 marks)
8. Construct a triangle whose perimeter is 240 mm and the sides are in the ratios 4.5:6.0:7.5 measure the smallest angle.(4 marks) 
9.           
   1. Figure 4 shows two views of a machined bracket drawn in first angle projection.
      
      Sketch in good proportion, the isometric view of the block taking X as the lowest point.(3 marks
   2. Figure 5 shows a truncated triangular prism drawn in first angle projection.
      
      Draw the end elevation.(4 marks)
10. Sketch in third angle projection the three orthographic views of the block shown in Figure 6.(6 marks)
    

SECTION B (30 marks)
(COMPULSORY)
Candidates are advised to spend not more than one hour on this question.

11. Figure 7 shows part of a coupling bracket drawn in first angle projection.
    Assemble the parts and draw FULL SIZE, the following:
    1. Sectional front elevation along the cutting plane A-A.
    2. End elevation in the direction of arrow B.
       Do not show the hidden details.
       
       

SECTION C (30 marks)
Answer any two questions from this section.

12. Figure 8 shows two views of a funnel drawn in third angle projection. The body of the funnel is conical with a wired edge and a cylindrical spout.
    
    Draw the development of:
    1. the body with a 3 mm wire edge;
    2. the spout (allow 5 mm seam and ignore the thickness of the material).(15 marks)
13. Figure 9 shows a pictorial view of a machined block.
    
    Draw FULL SIZE in third angle projection, the three orthographic views of the block.(15 marks)
14. Figure 10 shows a plan of a guard house.
    
    Draw section X-X to a scale of 1:50.(15 marks)
15. Specifications
    • Foundation:
      • Concrete strip 600 x 200
    • Walling:
      • 200 mm blockwork
    • Flooring
      • Ring beam 300 x 200
    • Flooring:
      • Concrete on hardcore
      • Screed on 100 mm concrete
    • Roof:
      • Pitch 30° covered with concrete tiles on 50 x 25 battens on 100 x 50 rafters.
    • Doors:
      • D1 steel casement 2000 x 900
      • D2 and D3 framed timber 2000 x 900
    • Windows:
      • W1 steel casement 1600 x 1000
      • W2, W3 and W4 1000 x 500

MARKING SCHEME

1.      
   1. Requirements
      1. Correct thickness of the lines must be maintained.
      2. Care must be taken in positioning.
      3. Dimension lines should always have arrow heads.
         (any 2 x 1/2) = 1 mark
   2. Reasons
      1. To ensure that they maintain their accuracy.
      2. To avoid physical damage.
         (1 mark)
2.         
   1. Industrial Training Centres
      Are government or NGO institutions which offer marketable skills at artisan and/or craft levels.
      (1 mark)
   2. Factors to Consider
      1. Cleanliness
      2. Accuracy
      3. Technique
         (any 2 x 1/2) = 1 mark 
3.           
   1. Communicating Design ideas
      1. Words
      2. Sketches/ drawings
      3. Models
      4. Mock-up/ realia
      5. Pictures/ photos 
         (any 4 x 1/2) - 2 marks)
   2. Conventions
      1.     
         
      2.     
         
      3.     
         
      4.     
         
4.       
   1. Composition
      1. Brass - copper and zinc
      2. Stainless steel - Iron and chromium
         (4 x 1/2 )= 2 marks
   2. 
         
      Correct view - 1
      Hatching - 1
      (2 marks)
5.              
   1.          
      1.    
         1. 20:1 means twenty units on the drawing paper represents one unit of the actual object.
         2. 1:20 means that one unit on the drawing represents twenty units on the actual object.(2 x 1) = 2 marks
      2.        
         1. Is applied in magnification e.g tiny parts like radio and clocks.
         2. Is applied in reduction e.g. house plans, maps e.t.c.(2 x 1/2) = 1 mark
   2.         
        
      Dimension of 135º - 1mark
      220o - 1mark = 2 marks
6.     
   
7.      
   
8.     
   
9.              
   1.  
      
   2.    
      
10.        
    
11.       
    
12.       
    
13. Plan = 9 faces (9 x ¹/₂) = 4143
    Curve = 1
    Front = 2 faces (2 x ¹/₂) = 2
    Elev. Connect groove - 1
    Smooth curve = 1
    End
    Elevation = face (1 x1)= 1
    Groove = 1
    Hidden details = 1
    Third angle = 1
    projection = 1
    Scale= 1
    Neatness = ¹/₂
    =15 marks
    
14.    
    
    Tiles = 1
    Battens = 1
    Rafters = 1
    Ring beam  = 1
    Wall = 1
    Concrete floor = 1
    Hard core = 1
    Foundation (2x1) = 2
    Ground level = 1
    Door opening (2x1) = 2
    Scale 
    height = 1
    width = 1
    pitch = 1
    TOTAL = 15 MARKS
    (2 x 1) = 2 marks