Question 1: Describe the key features of an isometric grid and explain how it helps in creating 3D drawings.

Answer: An isometric grid consists of a series of equally spaced parallel lines at 30 degrees to the horizontal, forming a pattern of equilateral triangles. It helps in creating 3D drawings by providing a consistent angle for drawing three axes (height, width, depth), allowing objects to be represented in three dimensions without perspective distortion.

Question 2: Sketch a simple cube using isometric projection in the space provided. Ensure all edges are aligned correctly with the isometric axes.

Answer: A correct sketch would show a cube with all sides of equal length, with the front, top, and side faces drawn as parallelograms aligned along the isometric axes at 30 degrees. The lines should be straight and connect to form a clear 3D cube shape.

Question 3: Explain why isometric drawings do not have perspective distortion, unlike traditional perspective drawings.

Answer: Isometric drawings do not have perspective distortion because they use parallel projection rather than converging lines. All dimensions along the axes are scaled equally, and the scale remains consistent throughout, resulting in a true representation of the object's proportions.

Question 4: Describe the steps you would take to draw an isometric view of a rectangular prism.

Answer: First, draw an isometric grid or set guidelines at 30 degrees. Then, sketch the front face as a parallelogram, ensuring sides are aligned with the axes. Next, extend lines back along the depth axis to create the side face, and then connect the vertices to complete the prism, making sure all edges are parallel to the isometric axes.

Question 5: Identify three common errors students make when drawing in isometric projection and suggest how to avoid them.

Answer: Common errors include: 1) Incorrectly angling lines away from the axes, which can be avoided by using a proper isometric grid or guide. 2) Unequal line lengths, which can be fixed by measuring consistently. 3) Failing to keep lines parallel along the axes; this can be prevented by careful use of rulers and guidelines.

Question 6: Sketch a simple isometric view of a triangular-based pyramid. Use the space provided, and ensure the pyramid's edges are aligned correctly with the isometric axes.

Answer: A proper sketch would show a pyramid with a triangular base, with all edges aligned along the isometric axes. The base triangle should be drawn as a parallelogram or triangle, and the apex should be connected to each corner of the base with straight lines, maintaining consistent angles.

Question 7: Draw a side view of an isometric drawing of a cylinder standing upright, including the top and side outlines.

Answer: The sketch should depict the cylinder's circular top as an ellipse aligned with the isometric axes, with the side view showing the height as a straight vertical line and the sides as parallel lines. The ellipse should be symmetrical and fit within the isometric perspective.

Question 8: Explain how you would convert a 2D orthogonal drawing of an object into an isometric view.

Answer: To convert, identify the key features and dimensions of the orthogonal drawing. Then, draw the object on an isometric grid or use guidelines at 30 degrees. Transfer the dimensions along the axes, maintaining parallel lines, and connect the points to form the 3D shape, ensuring all edges are aligned with the isometric axes.

Question 9: Design and sketch an ergonomic handle for a tool using isometric projection in the space provided. Consider comfort and grip in your design.

Answer: A correct sketch would show a handle with smooth, ergonomic curves, aligned along the isometric axes. The drawing should include the profile view and possibly a 3D perspective, with attention to the grip area, finger rests, and the connection to the tool's main body, all drawn with correct isometric lines.

Question 10: List three advantages of using isometric drawing in product design and engineering.

Answer: 1) It provides a clear representation of the object's dimensions without perspective distortion. 2) It allows for easy measurement and modification of parts. 3) It helps in visualising complex 3D objects quickly and accurately for manufacturing and assembly purposes.