Question 1: Describe the main characteristics of an isometric drawing. Why is it useful in design and engineering?

Answer: An isometric drawing shows three dimensions of an object on a single plane with axes at 120° angles. It allows accurate representation of complex objects, making it useful for visualising designs clearly without perspective distortion.

Question 2: Explain the difference between an orthographic projection and an isometric drawing.

Answer: Orthographic projection uses multiple views (front, side, top) to represent an object, each in 2D. Isometric drawing presents a 3D view of the object in a single image, with axes at equal angles, giving a sense of depth.

Question 3: In your own words, describe what makes an isometric grid different from a standard square grid.

Answer: An isometric grid consists of equilateral triangles forming a pattern of 30° and 150° angles, providing guidance for drawing in three dimensions. A square grid has right angles and is used for 2D drawings.

Question 4: Draw a simple cube using isometric projection. Make sure the edges are aligned with the isometric axes.

Answer: A correct sketch would show a cube with three visible faces, with edges drawn along the three axes at 120° angles, forming a neat, proportional 3D shape.

Question 5: Sketch an isometric view of a rectangular box with a lid, showing the front, top, and side faces.

Answer: The student should draw a rectangular box in isometric view, with the front face as a rectangle, the top as a parallelogram, and the side face in proper proportion, all aligned with isometric axes.

Question 6: Identify and describe two advantages of using isometric drawings in technical design.

Answer: Advantages include: 1) They provide a clear 3D view of objects, making complex shapes easier to understand; 2) They allow for accurate measurements and easy communication of design ideas.

Question 7: Sketch a simple mechanical part, such as a gear, in isometric view. Include the main features and ensure correct proportions.

Answer: A correct sketch should depict the gear as a cylinder with teeth, aligned along the isometric axes, with visible circles showing the gear's face and teeth in proper proportion.

Question 8: Explain why isometric drawings do not use perspective, and how this impacts the accuracy of technical drawings.

Answer: Isometric drawings do not use perspective, meaning parallel lines remain parallel and do not converge. This maintains measurement accuracy, essential for technical and engineering drawings.

Question 9: Design a simple piece of furniture, such as a stool or small table, using isometric drawing techniques. Sketch it in the space provided.

Answer: The sketch should show a basic furniture shape with correct isometric angles, with visible front, top, and side features, demonstrating understanding of isometric projection.

Question 10: Draw a small product prototype, such as a smartphone holder, in isometric view. Include the main structural features.

Answer: A proper sketch would portray the holder with a base and support arms, all aligned along isometric axes, with clear proportions and angles, illustrating a 3D view of the product.