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04-BS-11: December 2014

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 BCC Molybdenum — Atomic Radius, Density, and Plane Spacing
  2. Question 2 7075-T5 Aluminum — Full Tensile-Test Workup
  3. Question 3 Pb–Sn Lever Rule; Precipitate Coherency; Age-Hardening Candidates
  4. Question 4 PVC/PE Copolymer; Polymer Processing; Rubber Vulcanization
  5. Question 5 1080 Steel Statements; Weld Decay in 304 Stainless Steel
  6. Question 6 Glass-Fibre Load Sharing in Nylon; Minimum Radius Ratio for CN=4
  7. Question 7 Casting Solidification Defects; Chvorinov's Rule

Start with Question 1 →

National Exam 04-BS-11, Properties of Materials — December 2014. 3 hours, closed-book examination (approved Casio or Sharp calculator only). Any five questions constitute a complete paper; only the first five questions as they appear in the answer book are marked. All seven questions are solved below for completeness.

Reference texts: Callister & Rethwisch, Materials Science and Engineering: An Introduction, 9th ed. (crystal structure, mechanical behaviour, phase diagrams, polymers, corrosion, ceramics, casting).