Question 1: Draw a front view of a simple rectangular box with a height of 50mm and a width of 80mm. The box should have a small circular hole of 10mm diameter on the front face, positioned 20mm from the top and centered horizontally.

Answer: A rectangular front view measuring 80mm wide and 50mm high, with a centered 10mm diameter circle 20mm from the top edge.

Question 2: Sketch the side view of a cylindrical drinking glass that has a diameter of 60mm and a height of 120mm. The side view should show the circular profile of the top and the straight vertical lines representing the sides.

Answer: A vertical rectangle representing the side profile, with the top and bottom edges curved to depict the circular cross-section, dimensions clearly indicated.

Question 3: Describe how you would draw a simple orthographic projection of a cube measuring 40mm on each side. Include the three main views (front, top, side) in your explanation.

Answer: The front view shows a square of 40mm x 40mm. The top view is a square of the same size placed directly above the front view. The side view is also a 40mm square placed to the right of the front view. All views are aligned along a common edge.

Question 4: Draw a top view of a rectangular object measuring 100mm in length and 50mm in width with a small rectangular cutout of 20mm by 10mm located 15mm from the front edge and centered along the width.

Answer: A rectangle 100mm long and 50mm wide with a smaller rectangle (cutout) positioned 15mm from the front edge, centered horizontally at 20mm from each side.

Question 5: Sketch the outline of a simple L-shaped bracket in orthographic projection, showing the front view and top view on the same sheet. The bracket is 60mm tall, 40mm wide, and has a 10mm thick arm extending from the main body.

Answer: The front view shows an L shape with vertical and horizontal parts, dimensions 60mm and 40mm respectively, with the arm extending 10mm in thickness. The top view should show the L shape with the arm extending, matching the front view dimensions.

Question 6: Explain the importance of using orthographic projection in technical drawing and how it helps in visualising complex objects.

Answer: Orthographic projection allows accurate representation of objects from different viewpoints, providing detailed and precise views that help in understanding the shape and dimensions. It helps in visualising complex objects by breaking them down into simpler 2D views.

Question 7: Draw a simple box with a lid, shown in three views: front, top, and side. The box measures 70mm long, 50mm wide, and 40mm high. The lid is slightly larger, 72mm by 52mm, to fit over the box.

Answer: The front view shows the box with a height of 40mm; the top view shows the box as a rectangle 70mm by 50mm with the lid slightly larger (72mm by 52mm) drawn over it; the side view shows the depth of 70mm and height of 40mm.

Question 8: Sketch a detailed isometric view of a small cube with a side length of 30mm. Include visible edges and suggest shading for a realistic effect.

Answer: A 30mm cube shown in isometric projection with all visible edges, with some edges shaded to suggest depth and light source, demonstrating understanding of 3D form.

Question 9: Describe the steps you would take to create an orthographic projection of a complex object such as a key-shaped tool, including the views you would produce.

Answer: Identify the main features of the object, start with the front view showing the profile, then draw the top view to show the length and width, and side view for the thickness. Ensure all views are aligned and accurately scaled.

Question 10: Sketch a simple triangular prism with a base length of 60mm, height of 40mm, and side length of 50mm. Show the front, top, and side views on your sheet, correctly aligned.

Answer: The front view shows a triangle with a base of 60mm and height of 40mm; the top view shows a rectangle of 60mm by 50mm; the side view shows the length of 50mm with the triangular profile. All views are aligned along a common edge.

Question 11: Draw an orthographic projection of a rectangular box with a diagonal cut on one corner. The box measures 80mm long, 50mm wide, and 40mm high. Indicate the cut in the views clearly.

Answer: The front view shows the rectangle with a diagonal cut on one corner, the top view shows the shape with the cut indicated, and the side view reflects the cut's position. All views should be proportionate and properly aligned.