What type of projection is used to show multiple views of a part?

What type of projection is used to show multiple views of a part?

• A. Orthographic projection
• B. Isometric projection
• C. Perspective projection
• D. Axonometric projection

Answer: (A)

Orthographic projection is used to show multiple views of a part because it renders each view with true size and shape, free from perspective distortion. By projecting features perpendicular to each viewing plane, front, top, and side views line up precisely and carry accurate dimensions for manufacturing. This keeps measurements consistent across views, which is essential for specifying tolerances and ensuring the part is machined correctly. Pictorial methods like isometric or axonometric projections show a 3D appearance but distort proportions to convey depth, making precise measurements harder. Perspective projection also distorts sizes with distance and isn’t used for engineering drawings intended for fabrication. So, for clear, dimensionally accurate multiple views, orthographic projection is the right choice.

Orthographic projection is used to show multiple views of a part because it renders each view with true size and shape, free from perspective distortion. By projecting features perpendicular to each viewing plane, front, top, and side views line up precisely and carry accurate dimensions for manufacturing. This keeps measurements consistent across views, which is essential for specifying tolerances and ensuring the part is machined correctly. Pictorial methods like isometric or axonometric projections show a 3D appearance but distort proportions to convey depth, making precise measurements harder. Perspective projection also distorts sizes with distance and isn’t used for engineering drawings intended for fabrication. So, for clear, dimensionally accurate multiple views, orthographic projection is the right choice.