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04-BS-11: December 2018

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

  1. Question 1 BCC Vanadium Lattice Constant and Density; Grain-Boundary Types
  2. Question 2 PVC–PE Copolymer, Plastic Processing Methods, and Chloroprene Rubber Crosslinking
  3. Question 3 Tensile Test of a Magnesium-Alloy Bar — Full Mechanical-Property Workup
  4. Question 4 Heat-Treated Microstructures in 0.45%C Steel; Season Cracking and Dezincification in Brass; Weld Decay
  5. Question 5 CaO Coordination Number; Porosity/Grain Size in Ceramics; Weibull Statistics
  6. Question 6 NDT for Welded Pipe Cracks; Headlight Filament Forensics; Worn Carburized Gear
  7. Question 7 Reading the Diffusivity–Temperature Chart; Phosphorus Diffusion into a Silicon Wafer

Start with Question 1 →

National Exam 04-BS-11, Properties of Materials — December 2018. 3 hours, closed-book examination (approved Casio or Sharp calculator only). Notes on the paper state that any five questions constitute a complete paper and only the first five questions appearing in the answer book are marked, with 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. (crystal structure and density, polymers and vulcanization, mechanical properties/tensile testing, phase transformations and heat treatment, corrosion, ceramics and the Weibull distribution, diffusion).