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16-Civ-A3 Elementary Environmental Engineering: December 2014

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 Urbanization, Energy Use and Industrialization
  4. Question 4 Environmental Ethics and Wastewater
  5. Question 5 Air Pollution Control and Solid Waste Management
  6. Question 6 Environmental Impact Assessment and Sustainable Development
  7. Question 7 Water Resource Management, Water and Wastewater Treatment

Start with Question 1 →

Paper format. National Exams, December 2014 — 98-Civ-A3 Environmental Engineering. Three hours, closed book with one candidate-prepared double-sided aid sheet. Seven problems, each worth 20 marks; any five constitute a complete paper (maximum 100 marks), and only the first five answers in the work book are marked. All seven problems are solved below, because the set is a study resource rather than an exam attempt.

Reference texts. Davis & Cornwell, Introduction to Environmental Engineering; Mihelcic & Zimmerman, Environmental Engineering: Fundamentals, Sustainability, Design; Metcalf & Eddy, Wastewater Engineering: Treatment and Resource Recovery; Crittenden et al. (MWH), Water Treatment: Principles and Design; CCME Canadian Environmental Quality Guidelines; Impact Assessment Agency of Canada, Impact Assessment Act guidance.

Check: two source inconsistencies are carried through deliberately. (1) Problem 1(i) prints the dipropylene glycol formula as C6H14O2 (118.2 g/mol); the actual compound is C6H14O3 (134.2 g/mol). (2) The same sentence states the dose as “76 kg (1000 mol)”, which implies a molar mass of 76 g/mol and matches neither formula — 1000 mol of the real compound is 134 kg. The mole quantity is the load-bearing datum for a closed-system balance, so 1000 mol is adopted and both molar masses are reported where a mass concentration is asked for. NOTE 1 on page 1 expressly invites this kind of stated assumption.