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04-BS-11: May 2016

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

  1. Question 1 Full Tensile-Test Workup, Aluminum Alloy Bar
  2. Question 2 Modulus of Semicrystalline Nylon; Porosity of an Oil-Impregnated Bearing
  3. Question 3 Critical Radius Ratio for 4-Fold Coordination; FCC Lead Lattice Constant and Atomic Densities
  4. Question 4 Pb-Sn Eutectic Phase Diagram — Lever-Rule Analysis of a 30% Sn and an 80% Sn Alloy
  5. Question 5 Carbon Diffusion Flux in FCC Iron; Creep and Diffusion
  6. Question 6 Corrosion-Rate Reasoning; Weld Sensitization; Concentration Cells
  7. Question 7 1080 Steel Misconceptions; X-ray Inspection Limits; Fracture Diagnosis; Age-Hardened Rivet Design

Start with Question 1 →

National Exam 04-BS-11, Properties of Materials — May 2016. 3 hours, closed-book examination (approved Casio or Sharp calculator only). Candidates attempt any five of the seven questions for a complete paper, all questions of equal value. All seven questions are solved below for completeness.

Reference texts: Callister & Rethwisch, Materials Science and Engineering: An Introduction, 9th ed. (mechanical behaviour, powder-metallurgy porosity, crystal structure, phase diagrams, diffusion, creep, corrosion, failure analysis).