Paper format. National Examination 16-Mec-A4, Design and Manufacture of Machine Elements, May 2018. Three hours, open book, non-communicating calculator permitted. Six questions in two parts: Part A (Q1-Q3, manufacturing processes) and Part B (Q4-Q6, machine-element design). Candidates answer two questions from each part; four questions constitute a complete paper and all questions carry equal value (25 % each). All six questions are worked here.
Reference texts for this subject.
- S. Kalpakjian and S. R. Schmid, Manufacturing Engineering and Technology, 8th ed. (polymer processing: thermoforming, compression and transfer moulding, extrusion and die swell).
- M. P. Groover, Fundamentals of Modern Manufacturing: Materials, Processes and Systems, 7th ed. (shaping processes for plastics).
- R. G. Budynas and J. K. Nisbett, Shigley's Mechanical Engineering Design, 10th ed. (Ch. 5 failure prevention, Ch. 9 welded joints, Ch. 16 brakes and clutches).
- R. C. Hibbeler, Mechanics of Materials, 10th ed. (combined loading, transverse shear).
- CSA S16 / CSA G40.21 for Canadian structural steel grades; ASTM A36 is quoted in Q4 as printed on the paper, and the Canadian equivalent 300W is noted where it matters.
Check: Part B is figure-driven; every dimension used below was read from the printed figures. Where a figure is not dimensionally self-consistent (Q5, the drum is drawn oversized relative to the lever dimensions) the reading adopted and its effect on the answer are stated explicitly in that question.
