Question 1: Describe the steps you would take to draw the front view of a simple rectangular box with a circular hole on one face. Include considerations for hidden lines.

Answer: Begin by drawing the front face as a rectangle. Mark the position of the circular hole within the rectangle. Indicate hidden lines for any features not visible from the front. Ensure all lines are straight and proportionate.

Question 2: Sketch a side view of a T-shaped bracket that has a horizontal top part and a vertical support. The top is a flat rectangle, and the support is a narrow rectangle extending downward.

Answer: A vertical rectangle representing the support, with a horizontal rectangle at the top centered. The sketch should show the support extending downward and the top view as a wide, flat rectangle. Use proper proportion and clearly indicate edges.

Question 3: Sketch a simple object that is a rectangular prism with a sloped top surface. Label the front, top, and side views clearly.

Answer: The student should draw a rectangular prism with a diagonal line on the top face indicating the slope. The front view shows the height, the top view shows the rectangular shape with a slope, and the side view shows the height and depth. Proper alignment and proportion are essential.

Question 4: Explain how you would project the top view of a cube onto an orthographic drawing sheet. Describe the process step-by-step.

Answer: Start by drawing the front view as a square. From the corners of the front view, project vertical and horizontal lines to locate the top view. Draw the top face as a square aligned with the front view, maintaining the same dimensions. Use projection lines to ensure accuracy.

Question 5: Draw the plan (top view) of a L-shaped object, indicating the outline and any cutouts or holes.

Answer: The student should sketch an L-shaped outline, showing the walls and any internal cutouts as appropriate. Use solid lines for visible edges and dashed lines for hidden features. Keep the proportions accurate.

Question 6: Identify and describe two common errors you might make when drawing orthographic projections and how to avoid them.

Answer: Common errors include incorrect line types (e.g., using dashed lines for visible edges), and inconsistent or inaccurate proportions. To avoid these, use a scale and adhere to standard line conventions for visible, hidden, and center lines.

Question 7: Draw a side view of a gear with 12 teeth, showing the teeth profile and the main body of the gear.

Answer: The gear should be a circle with evenly spaced teeth around the perimeter. The teeth profile should be rounded or angled, and the main body should be shaded or marked as the central hub. Proper spacing and symmetry are important.

Question 8: Describe how the different views in an orthographic drawing relate to each other for a simple object like a box with a protruding handle.

Answer: The front view shows the height and width, the top view shows the length and width, and the side view shows the height and depth. The handle's position and shape should be consistent across views, with projections aligning correctly.

Question 9: Sketch a cross-sectional view of a hollow cylinder, showing the inner and outer walls.

Answer: Draw a circle representing the outer wall, then draw a smaller concentric circle inside to indicate the hollow part. Use hidden lines if necessary to show the section cut. Ensure symmetry and proper proportion.

Question 10: Explain the importance of using a consistent scale in orthographic drawings and how it affects the final representation.

Answer: Using a consistent scale ensures that all views are proportionate and accurately represent the object. It makes it easier to compare views and ensures clarity and precision in communication.