Question 1: Describe the main differences between 2D and 3D drawings in terms of visual representation and depth.

Answer: A 2D drawing shows flat images with height and width only, lacking depth, while a 3D drawing provides a sense of depth and volume, often using perspective or shading to illustrate form.

Question 2: Explain what is meant by 'isometric projection' and how it differs from standard perspective drawing.

Answer: Isometric projection is a method of drawing 3D objects where the three axes are equally foreshortened at 120 degrees, allowing all dimensions to be scaled equally without convergence. Unlike perspective, it does not show vanishing points and maintains consistent proportions.

Question 3: List three key features of an isometric drawing that distinguish it from other drawing methods.

Answer: Equal scale along all axes, 120-degree angles between axes, and a clear depiction of three dimensions without perspective distortion.

Question 4: Identify the angles between the axes in an isometric grid and explain why these angles are used.

Answer: The angles between axes are all 120 degrees. These angles are used to create a consistent and accurate 3D representation where measurements along axes are proportionally scaled.

Question 5: Describe the typical steps you would follow to draw a simple rectangular box in isometric projection.

Answer: Start by drawing a horizontal line for the front edge, then draw two vertical lines at 30 degrees to form the sides, connect the top edges with parallel lines at 30 degrees, then complete the back edges to form the box.

Question 6: Sketch an isometric view of a basic cube. Label the three axes and ensure the edges are drawn at 30 degrees to the horizontal.

Answer: A correct sketch includes a cube with all edges aligned to the three axes at 30 degrees, clearly showing the three-dimensional form without perspective distortion.

Question 7: Draw a simple isometric view of a triangular-based prism. Include the base and the height, and ensure the edges follow isometric guidelines.

Answer: A proper drawing shows a triangular base with sides drawn at 30 degrees, connecting to the top face with vertical and slanting lines, maintaining isometric proportion.

Question 8: What are some common mistakes made when drawing in isometric projection, and how can they be avoided?

Answer: Common mistakes include drawing axes at incorrect angles, inconsistent line lengths, and forgetting to keep all axes at 120 degrees. These can be avoided by using a proper isometric grid or guidelines and double-checking angles.

Question 9: Explain how you would convert a simple 2D front view of an object into an isometric drawing.

Answer: Identify the main dimensions in the 2D view, then project those dimensions along the isometric axes at 30 degrees, reconstructing the object in three dimensions while maintaining proportional measurements.

Question 10: Design a small, functional keychain using basic geometric shapes. Sketch your design in isometric view, considering how the shapes connect and form a 3D object.

Answer: A correct sketch would include basic shapes like cylinders, rectangles, or spheres assembled to form a keychain, with all components drawn at 30-degree angles to reflect isometric projection, showing depth and connection points.