NivaarExam PrepOfficial exam papers ↗

25-Nav-B1 Applied Thermodynamics and Heat Transfer (25-Mec-A1): December 2016

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

  1. Question 1 Short-Answer Set — Proof Stress, Hollow Shafts, Mean Stress & Biaxial Yield
  2. Question 2 Overhung Diving Board — Impact Stress and Safety Factor
  3. Question 3 Double Short-Shoe External Drum Brake
  4. Question 4 Stepped Round Shaft — Maximum Deflection and Critical Speed
  5. Question 5 Overhung Rotating Shaft — Fatigue Diameter and Deflection
  6. Question 6 Bolted Tension Joint — Bolt Size, Preload and Safety Factors

Start with Question 1 →

Paper format. National Exam 98-Mar-B1, December 2016. Open book, 3 hours, 100 marks. Part I (Problems 1–2) is compulsory; three of the four Part II problems (3–6) are required. All six problems are solved below.

Reference texts. Shigley’s Mechanical Engineering Design (Budynas & Nisbett, 10th ed.) — shafts & fatigue (Ch. 6–7), bolted joints (Ch. 8), brakes & clutches (Ch. 16); Juvinall & Marshek, Fundamentals of Machine Component Design; Hibbeler, Mechanics of Materials (impact loading).