Multiple choice general knowledge

Surface roughness on a drawing is represented by

  1. Circles

  2. Triangles

  3. Squares

  4. Rectangles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In engineering drawing, surface roughness is represented by triangular symbols (check marks). The number of triangles and their orientation indicate the roughness grade - a single triangle for basic roughness, two triangles for finer, three for very fine, and four for super-finishing.

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