Question 1: Describe the key features that distinguish an isometric drawing from other types of technical drawings.

Answer: An isometric drawing shows three dimensions of an object with all axes drawn at 120° angles to each other, allowing the viewer to see multiple sides simultaneously without perspective distortion.

Question 2: Explain why isometric drawings are useful in engineering and product design.

Answer: They enable clear visualization of complex objects in three dimensions, making measurements and assembly easier without perspective distortion.

Question 3: Identify the three main axes in an isometric drawing and specify their relative orientations.

Answer: The three axes are equally spaced at 120° angles: one vertical axis, and two axes slanting downwards at 30° from the horizontal, spaced 120° apart around the vertical.

Question 4: Draw a simple cube in isometric projection in the space provided. Ensure all edges are correctly aligned at 30°, 120°, and 90° angles.

Answer: A correct sketch would show a cube with all its edges aligned along the three axes at 30°, 30°, and 90°, forming a perfect isometric view of a cube.

Question 5: Sketch a basic rectangular box with an open top, viewed in isometric projection in the space provided.

Answer: The sketch should depict a rectangular prism with visible top, front, and side faces, with all edges aligned along the isometric axes, and the top face open (not shaded).

Question 6: Describe the steps you would take to draw a cylindrical object in isometric view.

Answer: Start by drawing two concentric circles in the isometric plane for the top and bottom edges, then connect the corresponding points with straight lines along the axes, ensuring the sides are angled at 30°.

Question 7: Sketch the outline of a simple chair in isometric projection in the space provided.

Answer: The drawing should include the seat, four legs, and the backrest, all aligned along the isometric axes, with correct proportions and angles to convey a three-dimensional form.

Question 8: Explain how the use of isometric grids can assist in creating accurate drawings.

Answer: Isometric grids provide a framework of lines at 30° angles that help maintain consistent proportions and angles, making it easier to draw accurate 3D objects.

Question 9: Design a simple keychain in isometric projection in the space provided.

Answer: A correct sketch would show a small rectangular or oval-shaped keychain with details such as a hole or logo, aligned along the isometric axes for a 3D appearance.

Question 10: List common mistakes to avoid when creating isometric drawings.

Answer: Common mistakes include not maintaining consistent angles for axes, failing to keep edges parallel along axes, and misaligning the proportions of different faces.

Question 11: Sketch a simple wedge shape in isometric projection in the space provided.

Answer: The sketch should depict a shape with a sloped edge on one side, with all faces aligned along the isometric axes, clearly showing the tapering form.