Question 1: Describe the three main views used in orthographic projection and explain what each view shows about an object.

Answer: The three main views are the front view, top view, and side view. The front view shows the height and width of the object, the top view shows the depth and width, and the side view shows the height and depth.

Question 2: Sketch a simple cube in orthographic projection showing the front, top, and side views on separate sections of your page.

Answer: A correct sketch will include three separate views: the front view showing a square, the top view showing a square directly above, and the side view also showing a square, all aligned to indicate the same object.

Question 3: Explain why orthographic drawings are useful in technical design and manufacturing.

Answer: Orthographic drawings provide accurate, scaled representations of objects from multiple angles, allowing precise communication of dimensions and shape for manufacturing and construction.

Question 4: Draw the front and side views of a rectangular box that measures 100mm in width, 50mm in height, and 75mm in depth.

Answer: The front view should be a rectangle 100mm wide and 50mm high; the side view should be a rectangle 75mm wide and 50mm high, aligned to show the same height.

Question 5: Describe the difference between an outline view and a sectional view in orthographic drawing.

Answer: An outline view shows the external shape of an object, while a sectional view shows the interior features by cutting through the object to reveal internal details.

Question 6: Sketch a simple L-shaped bracket in orthographic projection, including the front, top, and side views. Label each view.

Answer: The front view should show an L-shape with the vertical and horizontal parts; the top view shows the horizontal part as a rectangle, and the side view shows the vertical part as a rectangle. All views should be aligned to indicate the same object.

Question 7: Explain how you can determine the depth of an object from its orthographic views.

Answer: The depth of the object is shown in the top view or side view, depending on the orientation, and is measured as the distance between the front and back edges in the view.

Question 8: Sketch a simple cylindrical object in orthographic projection, showing the front, top, and side views in large, clear sections of your page.

Answer: The front view should be a rectangle representing the height and the diameter of the cylinder, the top view should be a circle indicating the cylinder's top, and the side view should be identical to the front, showing the same height and diameter.

Question 9: What are the advantages of using orthographic drawings over pictorial drawings in engineering design?

Answer: Orthographic drawings provide precise, measurable views that help in manufacturing, allow easy interpretation of dimensions, and reduce ambiguity compared to pictorial drawings.

Question 10: Sketch a detailed view of a small gear, showing the teeth profile, in orthographic projection. Include the front and top views in your sketch.

Answer: The front view should depict the gear's face with teeth profile visible, while the top view shows the circle of the gear with teeth outlines. Both views should be aligned to show the relationship between the face and the circumference.

Question 11: Describe the purpose of using different line types (e.g., solid, dashed) in orthographic drawings.

Answer: Solid lines are used for visible edges and outlines, dashed lines represent hidden features not visible from the view, and center lines indicate axes of symmetry or rotation.