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GATE 2023 BM – Question 25

Biomaterials and Tissue Engineering · Biomaterial Properties · 1 mark · Multiple choice

Which sequence lists the materials in decreasing tensile strength?

  1. Bone > PMMA > Polyurethane foam > Graphite
  2. Bone > Graphite > PMMA > Polyurethane foam
  3. Graphite > Bone > PMMA > Polyurethane foam
  4. PMMA > Bone > Polyurethane foam > Graphite

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Correct answer: (C) Graphite > Bone > PMMA > Polyurethane foam

Explanation

The material ranking intended by the source is graphite, then bone, then PMMA, then low-density polyurethane foam, C. Foam’s porous structure makes its tensile strength especially low. Actual graphite and bone strengths depend strongly on grade, porosity and loading direction; the official ranking assumes the representative material forms used by this question.

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