Paper format. National Exam, May 2019 — 16-Mec-B1 Advanced Machine Design. Open book; 100 marks; 4 pages. Two parts: Part I is compulsory (Problem 1, 10 marks; Problem 2, 30 marks) and candidates answer only three of the four Part II problems (Problems 3–6, 20 marks each). The rubric also states that assumptions must be declared, that any missing data may be assumed provided it is stated, and that every answer must carry a short summary of approach, method and result. All six problems are worked below so that the set functions as a complete study resource; a candidate on exam day would submit Problems 1 and 2 plus any three of Problems 3–6, for 100 marks.
Reference texts.
- Budynas & Nisbett, Shigley’s Mechanical Engineering Design, 11th ed. — Ch. 7 (shafts and shaft components, incl. the Rayleigh critical-speed estimate), Ch. 8 (screws, fasteners and the power-screw torque relations), Ch. 12 (lubrication and journal bearings), Ch. 16 (clutches, brakes, couplings and flywheels).
- Hibbeler, Mechanics of Materials, 10th ed. — Ch. 6 (shear-force and bending-moment diagrams, bending stress), Ch. 12 (beam deflection by successive integration and by moment-area).
- Norton, Machine Design: An Integrated Approach, 6th ed. — Ch. 10 (shaft design and critical speed), Ch. 14 (power screws), Ch. 16 (clutches and brakes; the short-shoe drum-brake model and its self-locking condition).
- Juvinall & Marshek, Fundamentals of Machine Component Design, 6th ed. — Ch. 10 (threaded fasteners and power screws), Ch. 13 (lubrication and sliding bearings), Ch. 18 (clutches and brakes).
- Boresi & Schmidt, Advanced Mechanics of Materials, 6th ed. — Ch. 4 (yield criteria, plane stress versus plane strain and the constraint effect).
