Drawing Techniques
Overview
Drawing is the designer's main language. Before a product can be made, discussed or sold, it has to be drawn, and the type of drawing chosen depends on the job it must do. A quick freehand sketch explores an idea in seconds; a precise orthographic drawing tells a maker exactly how big every part is; an exploded view shows how the pieces fit together. Choosing the right drawing technique, and producing it cleanly, is a core skill of design and technology.
This note covers the 0445 drawing-technique objectives: using freehand sketching and annotation to communicate ideas; understanding orthographic, isometric, exploded drawings and developments (nets); using flowcharts, Gantt charts and materials lists to plan making; and knowing where computer-aided design (CAD) adds value. Each technique is explained with concrete examples so you know not just how to draw it but when to reach for it.
Objectives
- use freehand sketching and annotations to communicate design ideas
- understand the use of orthographic, isometric, exploded drawings and developments (nets)
- understand the use of flowcharts, Gantt charts and materials lists in planning for making
- understand the use of computer-aided design (CAD) where appropriate.
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Lesson Evaluation
Congratulations on completing the lesson on Drawing Techniques. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- What is the main purpose of annotation on a freehand sketch? A. To make the sketch look more colourful B. To explain the thinking the drawing alone cannot show, such as materials and how it works C. To replace the need for any drawing D. To fill empty space on the page Answer: B
- In an isometric drawing, at what angle to the horizontal are the two sets of horizontal edges drawn? A. 15 degrees B. 30 degrees C. 45 degrees D. 60 degrees Answer: B
- Which drawing technique is best for showing how the separate parts of an assembly fit together? A. Orthographic projection B. A development (net) C. An exploded drawing D. A Gantt chart Answer: C
- A development (net) is best described as: A. A list of the materials needed to make a product B. The flat shape that folds up to form a three-dimensional object C. A drawing using vanishing points D. A schedule of when each making stage happens Answer: B
- Which planning tool shows when each stage of making happens and for how long? A. Flowchart B. Materials list C. Gantt chart D. Orthographic drawing Answer: C
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