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16-Civ-A3 Elementary Environmental Engineering: May 2016

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

  1. Question 1 Material Balance, Reaction Kinetics and Microbiology
  2. Question 2 Particle Characteristics, Solution Chemistry and Gases
  3. Question 3 Population Growth, Economic Growth and Urban Sprawl
  4. Question 4 Environmental Impact Assessment and Sustainable Development
  5. Question 5 Environmental Ethics and Energy Use
  6. Question 6 Air Pollution Control and Solid Waste Management
  7. Question 7 Water Resources, Water Treatment and Wastewater Treatment

Start with Question 1 →

Paper format. National Exams, May 2016 — 98-Civ-A3 Environmental Engineering. Three hours, closed book with one candidate-prepared double-sided aid sheet and an approved Casio or Sharp calculator. Seven problems of 20 marks each; any five constitute a complete paper and only the first five answered are marked, for a maximum of 100 marks. Section marks appear in brackets in the left margin and are repeated in the Marking Scheme on page 6. All seven problems are solved here, because the set is a study resource rather than an exam script.

Reference texts. Davis & Cornwell, Introduction to Environmental Engineering (McGraw-Hill); Mihelcic & Zimmerman, Environmental Engineering: Fundamentals, Sustainability, Design (Wiley); Metcalf & Eddy, Wastewater Engineering: Treatment and Resource Recovery; Crittenden et al. (MWH), Water Treatment: Principles and Design; Health Canada, Guidelines for Canadian Drinking Water Quality (GCDWQ); CCME, Canadian Environmental Quality Guidelines; the federal Impact Assessment Act and IAAC guidance; Engineers Canada / EGBC Code of Ethics.

Check: assumed data. Two readings are adopted and used consistently throughout. (1) In Problem 1(ii) the decomposition is taken as the stoichiometric reaction 2 N2O5 → 2 N2O4 + O2, the only balanced route from N2O5 to the two named products, and the vessel is closed at fixed volume and temperature so that pressure tracks total moles. (2) In Problem 2(ii) the printed atomic weights (Ca = 40, Mg = 24, Fe = 56, H = 1, C = 12, O = 16) are used exactly as given rather than the textbook values, and the printed line “mg2+ 40 mg/L” is read as Mg2+ = 40 mg/L. Note 1 on page 1 expressly invites the candidate to state such interpretations.