In orthographic projection, how many views are typically used to represent most objects?

• A. Three.
• B. Six.
• C. Two.
• D. Four.

Answer: (A)

Orthographic projection uses perpendicular views to show an object's size and shape without perspective distortion. For most objects, three principal views are enough: a front view to convey height and width, a top view to convey width and depth, and a side view to convey height and depth. With these three views, all three dimensions are captured unambiguously, so you can fully describe the geometry and dimensions. While more views are used for unusually complex parts (auxiliary or sectional views, for example), the standard set that covers the common cases is three.