The GATE Grind

GATE 2026 ME – Question 31

Additive Manufacturing · Additive manufacturing processes · 1 mark · Multiple choice

Which one of the following options is NOT an error associated with STereoLithography (STL) file in additive manufacturing?

  1. Staircase effect
  2. Missing facet
  3. Non-manifold topology conditions
  4. Degenerate facets

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Show answer and explanation

Correct answer: (A) Staircase effect

Explanation

Missing facets, non-manifold topology and degenerate facets are all faults in the STL file itself, which is a mesh of triangles. The staircase effect is a surface finish problem that comes from building the part in layers, not an error in the file.