Regarding orthographic projection, which statement is true?

• A. Three-view drawings are rare
• B. One-view, two-view, and three-view drawings are most common
• C. Four-view projections are standard
• D. Two views are never used

Answer: (B)

Orthographic projection communicates a part’s shape by representing it in multiple views from perpendicular directions. In aviation maintenance drawings, the standard practice is to provide front, top, and side views. This trio covers height, width, and depth, allowing you to fully define the geometry and dimension relationships without ambiguity. A single view can’t show depth, and while two views can capture two dimensions, some features still require a third perspective to be clear. Four-view projections aren’t the norm in most manuals; when more detail is needed, auxiliary views or other projection methods are used in addition to the primary three. Two views are common for simpler parts, but it isn’t universal or sufficient for every case. So the statement that one-, two-, and three-view drawings are the most common is the accurate reflection of typical practice.