Regarding orthographic projection, which statement is true?

Regarding orthographic projection, which statement is true?

• A. It always shows at least two views
• B. It could show as many as eight views
• C. It is not used in aircraft drawings
• D. One-view, two-view, and three-view drawings are the most common

Answer: (D)

Orthographic projection conveys a 3D shape by projecting its features onto flat planes that are perpendicular to one another, so you can read size and shape without perspective distortion. The most common practice uses one view for very simple parts, two views for moderate detail, and especially three views (front, top, and a side view) for a complete, unambiguous description of the geometry. This is why the statement that one-view, two-view, and three-view drawings are the most common reflects how engineers typically represent parts: it covers the simple cases and the standard multi-view approach used for clarity and accuracy. The other options aren’t as reliable: a single view isn’t always sufficient, you can imagine more than eight views for very complex objects but that isn’t the standard practice, and orthographic projection is widely used in aircraft drawings, not avoided.

Orthographic projection conveys a 3D shape by projecting its features onto flat planes that are perpendicular to one another, so you can read size and shape without perspective distortion. The most common practice uses one view for very simple parts, two views for moderate detail, and especially three views (front, top, and a side view) for a complete, unambiguous description of the geometry. This is why the statement that one-view, two-view, and three-view drawings are the most common reflects how engineers typically represent parts: it covers the simple cases and the standard multi-view approach used for clarity and accuracy. The other options aren’t as reliable: a single view isn’t always sufficient, you can imagine more than eight views for very complex objects but that isn’t the standard practice, and orthographic projection is widely used in aircraft drawings, not avoided.