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25-Nav-B1 Applied Thermodynamics and Heat Transfer (25-Mec-A1): December 2013

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

  1. Question 1 Short-Answer Concepts
  2. Question 2 Stepped Shaft — Deflection and Critical Speed
  3. Question 3 Bolted-Joint Design and Optimum Preload
  4. Question 4 Journal Bearing Sized by No-Load (Petroff) Friction
  5. Question 5 Overhung Diving Board — Impact Stress
  6. Question 6 Single Short-Shoe Drum Brake

Start with Question 1 →

National Exams — December 2013 · 98-Mar-B1 Advanced Machine Design. Open-book, 3 hours, 100 marks. The paper requires all of Part I (Problems 1 and 2) plus any three of the four Part II problems (3–6). All six problems are solved in full below.

Reference texts. R. G. Budynas & J. K. Nisbett, Shigley’s Mechanical Engineering Design, 10th ed. (shafts & critical speed §7; bolted joints §8; lubrication & journal bearings §12; brakes §16); R. C. Juvinall & K. M. Marshek, Fundamentals of Machine Component Design (bearings, brakes, impact); R. C. Hibbeler, Mechanics of Materials (bending, impact loading).

Check: this paper, although listed under Applied Thermodynamics and Heat Transfer, is headed “98-Mar-B1” with printed title “Advanced Machine Design”; it is a general mechanical machine-design paper — stress/yield criteria, shaft deflection/critical speed, bolted-joint preload, journal-bearing sizing, impact loading, and drum brakes — with zero thermodynamics or heat-transfer content, and it is solved as the exam actually printed.