By the end of this chapter, you will be able to:
Mastering these skills will help you produce professional, precise technical drawings that are essential for success in any technical trade.
Technical drawings are essential in biomedical engineering for accurately representing medical devices, diagnostic equipment, and complex system components. Precision and clarity in drawings ensure effective communication between engineers, manufacturers, and healthcare professionals in Kenya’s growing biomedical sector. This chapter focuses on preparing the necessary drawing equipment and materials, a fundamental step that guarantees quality and efficiency in producing technical drawings.
Proper identification and maintenance of drawing equipment are critical in biomedical engineering environments, where precision and reliability impact device safety and functionality. Biomedical engineers in hospitals, research labs, and medical equipment manufacturing firms in Kenya must select tools that meet industry standards and maintain them to avoid errors and delays.
Drawing boards provide a stable and flat surface for producing technical drawings. In biomedical engineering, where detailed schematics of devices such as prosthetics or diagnostic machines are required, a reliable drawing board ensures precision.
| Name | Specification | Use |
|---|---|---|
| Drawing Board | Smooth, rigid surface measuring 900mm x 600mm-made of wood or plastic laminate | Provides a flat, stable surface for drawing biomedical device schematics |
T-squares and set squares are essential for drawing precise horizontal, vertical, and angled lines, which are fundamental in biomedical equipment design for accurate component alignment.
| Name | Specification | Use |
|---|---|---|
| T-square | 600mm length, transparent plastic or wood with a rigid head | Used to draw straight horizontal lines and align paper on the drawing board |
| Set squares | 45°-45°-90° and 30°-60°-90° triangles, transparent plastic | Used to draw vertical and angled lines for biomedical component layouts |
A drawing set includes compasses, dividers, French curves, pencils, erasers, and other tools that enable the creation of curves, circles, and detailed annotations critical in biomedical equipment drawings.
| Name | Specification | Use |
|---|---|---|
| Compass | Metal with adjustable legs, 150mm length | Draws precise circles and arcs for components like catheter cross-sections |
| Divider | Metal with sharp points, 150mm length | Measures and transfers distances accurately on drawings |
| French curve | Plastic, various curve shapes | Draws smooth, non-circular curves for ergonomic medical device outlines |
| Mechanical pencils | 0.5mm and 0.7mm lead sizes | Provides consistent fine lines essential for detailed biomedical schematics |
| Erasers | Soft rubber and kneaded type | Removes pencil marks cleanly without damaging paper |
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Create a free accountThis chapter focused on the identification and proper care of essential drawing equipment including drawing boards, T squares, set squares, and complete drawing sets to ensure their longevity and accuracy in use. It also covered the identification and maintenance of drawing materials such as various types of drawing papers, pencils, erasers, and masking tapes, emphasizing the importance of preserving their quality for precise technical drawings. Guidance was provided on following manufacturer’s instructions and adhering to workplace procedures for the correct use and upkeep of all drawing tools and materials. The chapter highlighted the importance of complying with relevant environmental legislation to minimize negative impacts during drawing activities. Finally, it addressed the proper disposal of waste materials generated during drawing processes to maintain a safe and sustainable working environment.
Type: Individual
| Tools & Equipment | Materials |
|---|---|
| Soft-bristle brush | Drawing boards (wooden and plastic types) |
| Lint-free cleaning cloths | Mild detergent solution |
| Masking tape | Gloves |
| Dust coat/apron | |
| Writing material |
| S/N | Item | Quantity |
|---|---|---|
| 1 | Drawing boards (wooden and plastic types) | 1 Pc per Candidate |
| 2 | Lint-free cleaning cloths | 2 Pcs per Candidate |
| 3 | Mild detergent solution (100 ml) | 100 ml per Candidate |
| 4 | Soft-bristle brush | 1 Pc per Candidate |
| 5 | Storage racks for drawing boards | 1 per 5 Candidates |
| 6 | Gloves (latex or nitrile) | 1 Pair per Candidate |
| 7 | Dust coat/apron | 1 Pc per Candidate |
| 8 | Masking tape (white roll) | 1 Roll per 10 Candidates |
| 9 | Writing material (foolscap sheets) | 2 Sheets per Candidate |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: PREPARE AND INSPECT DRAWING BOARDS | |||
| Wore required PPE correctly (gloves, dust coat/apron) (Award 1 mark each for gloves and dust coat/apron worn correctly) | 2 | ||
| Assembled required cleaning tools and materials before starting (Award 1 mark for correct assembly and readiness) | 1 | ||
| Inspected two different types of drawing boards and correctly identified their materials (wooden and plastic) (Award 1.5 marks each for correct identification and description) | 3 | ||
| Checked boards for damages such as warping, cracks, or surface irregularities (Award 2 marks for thorough inspection and reporting) | 2 | ||
| Used mild detergent solution and lint-free cloth to clean drawing board surfaces properly (Award 3 marks for correct cleaning technique and no damage caused) | 3 | ||
| Used soft-bristle brush to remove dust and debris from edges and corners (Award 2 marks for effective brushing technique) | 2 | ||
| Applied masking tape appropriately to label boards without causing damage (Award 1 mark for proper labeling technique) | 1 | ||
| Demonstrated proper storage by placing drawing boards upright on storage racks to avoid warping (Award 3 marks for correct storage handling and placement) | 3 | ||
| Cleaned and tidied the work area after task completion (Award 1 mark for maintaining a clean workspace) | 1 | ||
| Sub-Total | 18 | ||
| PRODUCT CHECKLIST | |||
| Drawing boards are clean, free of dust, stains, and debris (Award 4 marks for visibly clean and well-maintained boards) | 4 | ||
| Boards correctly identified by type with accurate labeling (Award 3 marks for correct labeling and identification) | 3 | ||
| Boards stored upright on racks without leaning or stacking (Award 3 marks for proper storage to prevent damage) | 3 | ||
| No damage caused to boards during cleaning and handling (Award 2 marks if boards remain undamaged) | 2 | ||
| Work area left clean and organized after task (Award 2 marks for cleanliness and organization) | 2 | ||
| Sub-Total | 14 | ||
| GRAND TOTAL | 32 | ||
Type: Individual
| Tools & Equipment | Materials |
|---|---|
| T square | Drawing paper (A3 size) |
| Set squares (45° and 60°) | Pencil 2H |
| Drawing board | Eraser |
| Ruler 300 mm | Cleaning cloth |
| Masking tape | Mild detergent solution |
| S/N | Item | Quantity |
|---|---|---|
| 1 | T square | 1 Pc per Candidate |
| 2 | Set squares (45° and 60° triangles) | 2 Pcs per Candidate |
| 3 | Drawing board | 1 Pc per Candidate |
| 4 | Drawing paper (A3 size) | 2 Sheets per Candidate |
| 5 | Pencil 2H | 1 Pc per Candidate |
| 6 | Eraser | 1 Pc per Candidate |
| 7 | Cleaning cloth (lint free) | 1 Pc per Candidate |
| 8 | Mild detergent solution | 100 ml per 5 Candidates |
| 9 | Ruler 300 mm | 1 Pc per Candidate |
| 10 | Masking tape | 1 Roll per 10 Candidates |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: USE OF T AND SET SQUARES TO DRAW A RECTANGLE | |||
| Wore required PPE (apron/dust coat, gloves if applicable) (Award 1 mark for correct PPE worn or 0) | 1 | ||
| Assembled drawing board, paper, T square, set squares and pencil correctly (Award 1 mark for correct assembly or 0) | 1 | ||
| Placed drawing paper correctly on the drawing board and secured with masking tape (Award 2 marks for neat and secure placement or 0) | 2 | ||
| Used T square to draw a horizontal base line 200 mm long accurately (Award 3 marks for correct use and accuracy or 0) | 3 | ||
| Used set squares to draw perpendicular and angled lines forming a 200 mm by 100 mm rectangle (Award 5 marks for correct use of 45° and 60° set squares and accuracy or 0) | 5 | ||
| Checked lines for straightness, neatness, and correct dimensions (Award 2 marks for neat, straight lines and dimension correctness or 0) | 2 | ||
| Sub-Total | 14 | ||
| TASK 2: MAINTENANCE AND CARE OF T AND SET SQUARES | |||
| Cleaned T square and set squares using mild detergent solution and lint-free cloth (Award 3 marks for correct cleaning procedure or 0) | 3 | ||
| Dried the equipment thoroughly after cleaning (Award 1 mark for correct drying or 0) | 1 | ||
| Stored the T square and set squares properly to avoid damage (Award 2 marks for proper storage or 0) | 2 | ||
| Sub-Total | 6 | ||
| PRODUCT CHECKLIST | |||
| Rectangle drawn measures 200 mm x 100 mm within ±1 mm tolerance (Award 3 marks for correct dimensions or 0) | 3 | ||
| Lines are straight, clear, and without smudges (Award 3 marks for neatness and clarity or 0) | 3 | ||
| Lines are perpendicular and angles correctly formed using set squares (Award 4 marks for correct angles and use of set squares or 0) | 4 | ||
| Sub-Total | 10 | ||
| GRAND TOTAL | 30 | ||
At the start of this chapter we promised you would be able to:
Tick each one you can genuinely do.
So, are you there yet?
You're competent when you can confidently do 50% or more of what this chapter promised.
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