Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — May 2015 — 04-Chem-A5 Chemical Plant Design and Economics. Three-hour, closed-book exam (one two-sided aid sheet and an approved calculator permitted). Six equally weighted 20-mark questions are posed; the candidate answers any five and only the first five are marked. All six are worked below for completeness. Questions 2, 3 and 5 carry the numerical work (equivalent-annual-cost equipment selection, a discounted-cash-flow rate-of-return analysis, and a gravity-decanter sizing); questions 1, 4 and 6 are design / materials-selection / safety questions answered as organised prose, with Question 1 supported by a process flow sheet and a light overall material balance.
Reference texts: M.S. Peters, K.D. Timmerhaus & R.E. West, Plant Design and Economics for Chemical Engineers (5th ed., McGraw-Hill) — the exam's named primary text (cost–capacity estimation Ch. 6, interest and investment Ch. 7, profitability and rate of return Ch. 10); R.K. Sinnott & G. Towler, Chemical Engineering Design (Coulson & Richardson Vol. 6, 5th ed., Butterworth-Heinemann) — separator/decanter sizing (§10.6), materials of construction (Ch. 7) and the process-design safety checklist (Ch. 9); R. Turton et al., Analysis, Synthesis, and Design of Chemical Processes (4th ed., Prentice Hall) — flowsheet synthesis; supporting Canadian practice from CSA B51 / ASME BPVC (pressure vessels), API 650 (atmospheric storage tanks) and NACE corrosion guidance.
