Drawing And Design Paper 1 Questions and Answers - Nginda Girls Mock Examination 2023

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Drawing And Design Paper 2 Questions and Answers - Nginda Girls Mock Examination 2023

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Instructions

You should have the following for this examination:
Sufficient A4 drawing papers (to be used as answer sheet for section A)
Drawing instruments;
3 sheets of drawing paper size A3;
This paper consists of three sections: A, B and C.
Answer all the questions in sections A and B and any other two questions from section C.
Questions in section A must be answered on the A4 papers provided. The work must be arranged in an orderly manner.
Questions in section B and C should be answered on A3 sheets of drawing paper provided.
All dimensions are in millimetres unless otherwise stated.
NUMBER your work clearly.
Candidates may be penalized for not following the instructions given in this paper.
This paper consists of 11 printed pages.
Candidates should check the question paper to ascertain that all the pages are printed as
indicated and that no questions are missing.
Candidates should answer the questions in English.

QUESTIONS

Section A (50 marks)

1. Give two advantages of technical drawing in the field of engineering
  (2 marks)
2. State four parts of a computer that are needed in order to make any drawing using a computer. State one purpose of each part. (2 marks)
1. 1. State the method of sharpening a pencil suitable when you want to perform the following (2 marks)
    1. Drawing fine and thick line
    2. Drawing accurate lines
    3. Sketching and lettering
    4. Drawing a circle
  2. Outline how a pencil should be positioned when used with knee joint pair of
    compasses (1 mark)
2. Sketch the symbols used for the following conventions in drawing:
  1. Screwed joint.
  2. External screw thread (3 marks)
1. Give four reasons why metals are preferred in design of heavy machines and objects. (2 marks)
2. List four components of a business plan (2 marks)
Define each of the following terms as used in the design process; (2 marks)
1. Primary objective
2. Aesthetics
Construct the involute of a pentagon of sides 20 mm (5 marks)
Figure 1 shows a block drawn in isometric projection. Draw in good proportion the following views in third angle projection: (7 marks)
1. The front elevation
2. The plan.
  
  Figure 1
Figure 2 shows an elevation and an incomplete plan of a truncated rectangular pyramid drawn in first angle projection. (4 marks)
1. Copy the elevation
2. Complete the plan
  
  Figure 2
Figure 3 shows three views of a shaped block drawn in third angle projection. Draw the block in isometric projection taking X as the lowest point. (6 marks)

Figure 3
Illustrate methods of dimensioning each of the following features: (6 marks)
1. Small circles
2. Reflex angles
3. Arcs
4. Small gaps
Figure 4 shows an exploded view of a joint. Assemble the parts and draw full size the three orthographic views of the joint in third angle projection. (6 marks)

Figure 4

SECTION B (20 marks)
This question is compulsory
It should be answered on the A3 paper provided.
Candidates are advised to spend not more than 1 hour on this question.

Figure 5 shows the parts of a pulley wheel system drawn in first angle projection. Assemble the parts and draw Full Size the following:
1. A sectional end elevation.
2. The front elevation (20 marks)
  
  Figure 5

SECTION C (30 marks)
Answer any two questions from this section on the A3 paper provided.

Figure 6 shows a cone truncated at the top and bottom. Copy the figure and draw the surface development of the cone. (15 marks)

Figure 6
Figure 7 shows the front view of a house. Construct a diagonal scale in which 20 mm represent 1 m to read up to 8 m.
Use the scale to draw the view of the house. (15 marks)

Figure 7
Figure 8 shows three orthographic views of a block drawn in first angle orthographic projection.

Figure 8
Draw the isometric view of the block. Include hidden details. (15 marks)

MARLING SCHEME

Section A (50 marks)

1. Give two advantages of technical drawing in the field of engineering (2 marks)
  - It enables engineers to be more accurate.
  - It enables engineers to know the actual size and shape of the object.
  - It enables engineers to plan their work on papers hence improve their speed.
  - It equips engineers with variety of techniques which are needed to solve a particular problem. Any two correct answers 1 each=2
2. State four parts of a computer that are needed in order to make any drawing using a computer. State one purpose of each part. (2 marks)
  - Monitor- for display
  - Mouse- for moving the cursor to desired positions.
  - Central Processing Unit- it processes instructions and handles calculations and other logical operations of the computer.
  - Keyboard- it is used for putting information including letters, words and numbers into a computer. 4x½= 2
1. 1. State the method of sharpening a pencil suitable when you want to perform the following (2 marks)
    1. Drawing fine and thick line – Chisel shape
    2. Drawing accurate lines- conical point
    3. Sketching and lettering- conical point
    4. Drawing a circle- chisel shape each method x½=2
  2. Outline how a pencil should be positioned when using a knee joint pair of compasses. (1 mark)
    - The pencil and needle should be kept perpendicular to the paper.√1
2. Sketch the symbols used for the following conventions in drawing:
  1. Screwed joint.
    
    Correct symbol =1½
  2. External screw thread (3 marks)
    
    Correct symbol=1½
1. Give four reasons why metals are preferred in design of heavy machines and objects. (2 marks)
  - They are resistant to extreme temperatures e.g carbon alloys.
  - They are resistant corrosion e.g copper
  - They conduct heat and electricity e.g aluminium and copper
  - They have high tensile strength e.g steel 4 reasons x½=2
2. List four components of a business plan (2 marks)
  - Name of the business
  - The product or services to be offered.
  - Human resources needed
  - The market to serve
  - Summary of the plan. 4 components x½=2
Define each of the following terms as used in the design process; (2 marks)
1. Primary objective
  It is an objective of a design that solves the problem it is intended for. √1
2. Aesthetics
  This refers to the appearance of the final object.√1
Construct the involute of a pentagon of sides 20 mm (5 marks)

Pentagon=1½
Linework=2
Path forming an invoute=1½
Figure 1 shows a block drawn in isometric projection. Draw in good proportion the following views in third angle projection: (7 marks)
1. The front elevation
2. The plan.
  
  3rd angle projection=½
  Proportional=½
  3 faces on front elevation=1½
  Hidden details=1½
  6 faces on the plan=3
Figure 2 shows an elevation and an incomplete plan of a truncated rectangular pyramid drawn in first angle projection. (4 marks)
1. Copy the elevation
2. Complete the plan
  Copying the elevation=1
  Linework=2
  Completing the plan=1
Figure 3 shows three views of a shaped block drawn in third angle projection. Draw the block in isometric projection taking X as the lowest point. (6 marks)

Isometric=½
Point X as the lowest point=½
5 faces on the object=2½
Dimensioning=2
Neatness=½
Illustrate methods of dimensioning each of the following features: (6 marks)
1. Small circles
2. Reflex angles
3. Arcs
4. Small gaps
  
  Small circle=1½
  Reflex angle=1½
  Arcs=1½
  Small gaps=1½
Figure 4 shows an exploded view of a joint. Assemble the parts and draw full size the three orthographic views of the joint in third angle projection. (6 marks)

3rd angle projection=½
Direction=½
3 faces on front view=1½
3 faces on end view=1½
Plan=1
Hidden details=1

SECTION B (20 marks)
This question is compulsory
It should be answered on the A3 paper provided.
Candidates are advised to spend not more than 1 hour on this question.

Figure 5 shows the parts of a pulley wheel system drawn in first angle projection. Assemble the parts and draw Full Size the following:
1. A sectional end elevation.
2. The front elevation (20 marks)
  
  Sectional front view End view
  Assembling three parts 3x2=6 Overall dimensions=2 copying=3
  Hatching wheel and frame=2 Hidden details not shown=1 Wheel shown on frame=2
  Pin not hatched=1 Head of pin shown=1
  Locking pin using pin=1 Neatness=1

SECTION C (30 marks)
Answer any two questions from this section on the A3 paper provided.

Figure 6 shows a cone truncated at the top and bottom. Copy the figure and draw the surface development of the cone. (15 marks)

Copying=2
Drawing and dividing circle=1
Linework=7
Development=3
Neatness=2
Figure 7 shows the front view of a house. Construct a diagonal scale in which 20 mm represent 1 m to read up to 8 m.
Use the scale to draw the view of the house. (15 marks)

Actual length=1
Major scale=2
Diagonal scale=2
Should be drawn using reading from diagonal scale. Construction arc must be available
Frame=1½
Door=2½
Two windows=4
Neatness=2
Figure 8 shows three orthographic views of a block drawn in first angle orthographic projection.

Isometric=½
6 faces 6x½=3
Circular features=6
Dimensioning=2½
Hidden details included=2
Neatness=1
Draw the isometric view of the block. Include hidden details. (15 marks)