Question 1: Explain the purpose of using isometric projection in technical drawing. Include two advantages in your answer.

Answer: Isometric projection allows for a three-dimensional representation on a two-dimensional surface, making it easier to visualize objects. Advantages include maintaining consistent scale along axes and providing clear visualization of complex shapes.

Question 2: Describe the differences between orthographic projection and isometric projection.

Answer: Orthographic projection uses multiple flat views (front, side, top) to represent an object, while isometric projection shows a single view where the object is rotated so that all three axes are equally foreshortened, providing a 3D appearance.

Question 3: Sketch a simple cube in isometric projection in the space provided. Ensure all edges are correctly aligned and proportioned.

Answer: A correct sketch would show a cube with all edges of equal length, with the top face appearing as a hexagon and the sides connecting at 30° angles, forming a symmetrical 3D shape.

Question 4: Draw a basic rectangular prism in isometric view. Label the height, width, and depth.

Answer: A correct sketch would show a 3D rectangular box with clear isometric lines, with the dimensions labeled accordingly. The shape should have parallel edges and consistent proportions.

Question 5: Identify and explain two common mistakes made when drawing in isometric projection.

Answer: One mistake is not maintaining the 30° angles for the axes, which distorts the shape. Another is uneven scaling, making some edges longer or shorter than others, which affects the accuracy.

Question 6: Describe how you would construct an isometric grid and explain its importance in drawing isometric objects.

Answer: An isometric grid consists of equally spaced horizontal and diagonal lines at 30°, forming a pattern of equilateral triangles. It helps maintain correct proportions and angles when drawing in isometric view.

Question 7: Design a simple isometric view of a small house with a pitched roof. Include basic features such as windows and a door.

Answer: A correct sketch would show a rectangular base with a triangular pitched roof, windows on the sides or front, and a door on the front face. Lines should follow isometric angles, with proper proportion and alignment.

Question 8: List three common uses of isometric drawings in industry or engineering.

Answer: Isometric drawings are used in technical blueprints, 3D modeling for product design, and in architectural visualizations to illustrate structures clearly.

Question 9: Explain why isometric drawings are often preferred over perspective drawings for technical purposes.

Answer: Because isometric drawings maintain scale and proportions across all axes without distortion, making measurements accurate and easier to interpret for manufacturing and engineering.

Question 10: Sketch a simple mechanical part, such as a gear or pulley, in isometric view, focusing on showing its main features.

Answer: A correct sketch would clearly depict the shape and features of the part, such as teeth on a gear or the grooves of a pulley, with all lines following isometric angles and proportions.

Question 11: Describe the process of converting a 2D orthographic drawing into an isometric view.

Answer: First, identify the main dimensions from the orthographic views. Then, rotate the object in 3D space, aligning it so that the three axes are at 30° to the horizontal, and draw the object following isometric lines to create a 3D representation.