Drawing and Design Paper 1 Questions and Answers - KCSE 2022 Mock Exams Set 2

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INSTRUCTIONS TO CANDIDATES.

  • You should have the following for this examination:
    • Drawing instruments
    • 3 sheet of drawing paper size A3
    • Scale rule
  • This paper consists of THREE sections A, B and C.
  • Answer ALL the questions in section A and B and any TWO questions from section C.
  • Questions in section A must be answered on the answer sheets provided.
  • Questions in section B and C should be answered on the A3 drawing papers provided.
  • All dimensions are in millimeters unless otherwise stated.
  • Candidates may be penalized for not following the instructions given in this paper.

SECTION A (50 marks)
Answer ALL the questions in this section.

  1.        
    1. Distinguish between the roles of an architect and a draughtsman. (2 marks)
    2. State two precautions to be observed when storing a T-square, (2 marks)
  2.  
    1. Give two reasons why e dimensioning symbols used? (2 mark)
    2. Define the following as used in engineering
      1. Orthographic projections.
      2. Detailed drawings
    3. Demonstrate using sketches how to dimension blind hole.
  3.  
    1. With reference to engineering design, define the following terms:((2 marks)
      1. restriction…
      2. prototype.
    2. Figure 2 shows a longitudinal section of an ISO metric thread. Show the following:
      1. pitch
      2. crest
      3. root
      4. major diameter. (2 marks)
        Drawcsp1q3biv
  4. Figure 3 shows the elevation of a cam profile
    Construct the profile (3marks)
    Drawcsp1q4
  5.  
    1. Give two major elements in each of the following materials: ( 3 marks)
      1. bronze…………………………………………………………………………………...
      2. soft solder……………………………………………………………………………….
      3. brass………………………………………………………………………………………..
    2. Figure 4 shows two views of a block. Sketch the oblique views of the block with A-A being the lowest point. (3 marks)
      Drawcsp1q5iii
  6. Sketch free hand exploded pictorial views for each of the following wood joints (4 marks)
    1. double mortise and tenon joint
    2. stopped housing joint.
  7. Construct a plain scale of 1:5 to measure to an accuracy of 10mm and to a maximum length of 600mm. Show a reading oi’380rnm. (3 marks)
  8.              
    1. Figure 5 shows a plan of a machine part drawn to a scale twice full size. Measure and dimension correctly the arc, tapped hole and bevel. (3 marks)
      Drawcsp1q8a
    2. Draw an oblique square based pyramid whose vertical height is equal to the base Length 40mm . Retain the construction lines. (2 marks)
  9. Figure 6 shows a cube drawn in perspective. Name the labelled areas A, B, C and D. (2 marks)
  10. Figure 7 shows an isometric drawing of a block. Draw:
    1. Sectional front elevation along plane A — A.
    2. End elevation.
    3. Plan. (6marks)
      Drawcsp1q10c

SECTION B (20 marks)
This question is compulsory. Candidates are advised to spend not more than one hour on this question.

  1. Figure 7 shows parts of aretort and stand clamp drawn in first angle projection. Assemble the parts and draw FULL SIZE, the following views of the vice in third angle projection:
    1. A sectional front elevation along the cutting plane P-P
    2. End elevation in the direction of arrow X
    3. Plan
      Insert three leading dimensions and do not show hidden details
      Drawcsp1q11

SECTION C (30 MARKS)
Answer any two questions in this section.

  1. The figure below shows two-piece elbow pipes intersecting.
    Draw the surface developments of pipes X and Y. (15 marks)
    Drawcsp1q12
  2. Figure below shows a pentagonal pyramid truncated by a cutting plane tilted at 300 copy the view and draw the following:
    1. Complete plan
    2. True shape and auxiliary view at 45°
      Drawcsp1q13
  3. A cylinder, whose internal diameter is 50mm, has a 5mm thick wall and 130mm length. Two points, one outside and other inside the cylinder, start moving along and round the cylinder at a constant velocity.
    Draw the loci of the two points as they move from the base to the top of the cylinder by completing two revolutions. Name the curve traced by one of the points. (15 marks)

Marking Scheme

  1.          
    1. Architect He produces designs in form of sketches. He is a client representative on site
      Draughtsman he produces accurate working drainage to be used. He works on sketches produced in a designer
    2.      
      1. BLADE: should not be in contacts with heavy objects suspend it and work with cloth.
      2. STOCK –Take care not to have a loose stock tighten the screw or assemble it to form 900
  2.   
    1. LOCATING CENTRES OF (i) Dividing drawing into equal or symmetrical parts.
      1. indicating Arcs.
    2.  
      Drawcsp1qa2b  
  3.          
    1. Restriction is a factor which limits the freedom of choice e.g. of materials methods sizes e.t.v
      Prototype a scaled model which reveals design problems not anticipated or forseen during the stages
  4.        
  5.    
    1.      
      1. bronze - In and copper and will quantities of zinc  
      2. Soft solder - Tin and lead
      3. Brass  -copper and zinc
    2.      
      Drawcsp1qa5b
  6.                
    1. Drawcsp1qa6 
  7. Plain scale 
    Drawcsp1qa7

  8.                 Drawcsp1qa8  

  9.       
    Drawcsp1q9
  10.    
    Drawcsp1qa10
  11.   
    Drawcsp1qa11
  12.   
    Drawcsp1qa12
  13.    
    Drawcsp1qa13
  14.    
    Drawcsp1qa14

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