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04-BS-11: December 2015

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

  1. Question 1 Cold-Drawn Copper Wire Design; Dislocations in Cold Rolling
  2. Question 2 Substitutional Solid Solutions; ASTM Grain Size; Fatigue Failure
  3. Question 3 Full Tensile-Test Workup
  4. Question 4 Ti BCC→HCP Volume Change; the Charpy Impact Test
  5. Question 5 TTT Diagram Reading & Isothermal Anneal Design; Critical Crack Size
  6. Question 6 Polyacrylonitrile Molecular Weight & Degree of Polymerization
  7. Question 7 Corrosion Statements; Galvanized Steel; Weld-Zone Attack on Stainless Steel
  8. Question 8 Al-Si Casting Alloy Phase Diagram; Polymer Modulus vs. Temperature

Start with Question 1 →

National Exam 04-BS-11, Properties of Materials — December 2015. 3 hours, closed-book examination (approved Casio or Sharp calculator only). Candidates attempt five, and only five, questions for a full paper: two from Section A, two from Section B, and the fifth from either section. All eight questions are solved below for completeness.

Reference texts: Callister & Rethwisch, Materials Science and Engineering: An Introduction, 9th ed. (crystal structure, mechanical behaviour, diffusion, polymers, phase transformations, corrosion, nondestructive testing).