Drawing and Design Paper 1 Questions and Answers - Lainaku II Joint Mock Examination 2023

INSTRUCTIONS TO CANDIDATES

1. You should have the following for this examination
   • 4sheets of drawing paper size A3
   • Drawing instruments
2. This paper has section A,B and C
3. Candidates are advised not to spend more than one hour on section B
4. The candidates are advised to answer the questions on the A3 drawing papers provided
5. Candidates should answer the questions in English

SECTION A (50 Marks)

Answer all the questions in this section on the answer sheet provided.

1.  
   1. Write the following is full as applied in industrial training:  (3 marks)
      1. TVET;
      2. NITA;
      3. T.T.I.
   2. State two uses of a beam compass   (1 mark)
2.  
   1. Define the folloing terms as used in design process:  (4 marks)
      1. primary objective;
      2. secondary objective
      3. design brief
      4. prototype;
   2. With the aid of sketches describe three types of dimensions in technical drawing (3 marks)
3. State one use of each of the following computer components:   (2 marks)
   1. keyboard
   2. mouse
   3. monitor
   4. hard disk
4. Construct a triangle of perimeter 165mm whose sides are in the ratio of 3:5:6.
5.  
   1. List four factors to consider when lettering
   2. State three effects of poor disposal of engineering materials to the environment
6. Figure 1. shows a block drawn in a isometric projection. Sketch in good proportion the orthographic views of the block in the first angle projection. (7 marks)
      
7. Figure 2. shows three views of a block drawn in third angle projection.
   
   On the same isometric grid paper provided, sketch the pictorial view of the block taking ''Y'' as the lowest point. (6 marks)
8. Construct a scale of 10:9 and draw figure 3 using the scale.
   
9. An equilateral triangular prism is intersected by a cylinder at right angles as shown in figure 4.
   
   Figure 4.
   Draw the line of intersection. (5marks)
10. Figure 5. shows views of two part of a block drawn in first angle projection.
    
    Assemble the parts and sketch in good proportion the oblique projection of the block. (5 marks)

SECTION B (20 Marks)
(compulsory)
Candidates are advised to spend not more than one hour on this question

1. 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 elecation in the direction of arrow B.
      Do not show the hidden details.
      

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

1. Figure 7. shows the front elevation of a truncated hexagonal prism tilting at an angel of 30°.
   Cop the given view and draw the following in third angle projection:
   1. End elevation in the direction of arrow E;
   2. The plan.            (15 marks)
      
2. Figure 8 shows the plan of an object. A string attache dto its circumference is wound tight. Trace the path followed by a mark P on the string as it unwinds through one revolution.  (15 marks)
   
3. Figure 9 shows a pictorial view of a machined block.
   
   Draw a FULL SIZE  in third angle projection, the three orthographic view of the block. (15 marks)

MARKING SCHEME

1.  
   1.  
      • TIVET - Technical Vocational Education Training.
      • NITA - National Industrial Training Authority.
      • TTI - Technical Training Institute.      (3 x 1 = 3 marks)
   2. Uses of a beam compass:
      • Drawing circles and arcs of very large radii.
      • Stepping off large distances.     (2 x 1 = 2 marks)
2.  
   1. Terms in the design process:
      • Primary objective is the functionality of a design solution or a workable solution.
      • Secondary objective refers to value addition, eg. comfort, aesthetics etc.
      • Design brief refers to the narration of the problem solution.  (4 x 1 = 4 marks)
   2. Types of dimensions
      
                                                                                       (3 x 1 = 3 marks)
3.  
   1. Uses of:
      • Key board - for typing/keying in information and giving commands.
      • Mouse - For giving commands.
      • Monitor - To display whatever is going on or taking place in the computer.
      • Hard disk - For storage of information i.e. primary storage media.
        (4 x ¹/₂ marks) = 2
4.  
   
5.  
   1. Factors to consider when lettering:
      • Use of guidelines to give uniformity.
      • Proportional and equal spacing of letters and numerical.
      • Uniform strength/outline of letters and numerical.
      • Consistency in style i.e. italic or gothic.
      • Ascending and descending for lower case letters.
      • Proportionality with the paper size.    (Any 4 x ½ = 2 marks)
   2. Effects of poor disposal of eng. materials.
      • Global warming.
      • Harmful to the soil.
      • Harmful to the aquatic life.
      • Unsightly environment.    (Any 3 x 1 = 3 marks)
6.   
   
7.  
   
8.  
   
9.  
   
   Front Elevation
   Construction of circle or semi-circle1 mark
   Correct projection to the prism ½ mark
   Plotting the points on the prism  1 mark
   Smooth curve   3½
   Plan
   Construction of circle or semi-circle 1 mark  ½mark
   Correct projection the prism       1 ½  marks                           Total
                                                                                                   5 marks
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