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22-Mec-A4 Design and Manufacture of Machine Elements: Undated paper

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

  1. Question 1 Grinding wheel grade, workpiece burning, and acting hardness
  2. Question 2 Press-formed part failing in stretching — forming-limit diagnosis
  3. Question 3 Springback control on a precision bent lever
  4. Question 4 Hollow input shaft of a crane gear box — fatigue, slopes and key stresses
  5. Question 5 External symmetric pivoted-shoe brake
  6. Question 6 Stress element and Mohr circle for a cantilever I-beam

Start with Question 1 →



Paper format. National Examinations, May 2019 — 16-Mec-A4 Design and Manufacture of Machine Elements. Three hours, open book, any non-communicating calculator. Six questions in two parts: Part A (Q1–Q3, manufacturing processes) and Part B (Q4–Q6, machine-element analysis). The rubric asks for two questions from each part; all six are solved here. All questions carry equal value (25 %).

Reference texts. S. Kalpakjian and S. Schmid, Manufacturing Engineering and Technology, 7th ed. (Part A: Ch. 16 sheet-metal forming, Ch. 26 grinding); M. Groover, Fundamentals of Modern Manufacturing, 6th ed. (Ch. 20, 25); R. Budynas and K. Nisbett, Shigley's Mechanical Engineering Design, 10th ed. (Ch. 3 stress, Ch. 6 fatigue, Ch. 7 shafts and keys, Ch. 16 brakes); R. Hibbeler, Mechanics of Materials, 10th ed. (Ch. 6, 7, 9 transverse shear and stress transformation).