Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format. Professional Engineers of Ontario / Engineers Canada annual examination 07-Mec-B2 Environmental Control in Buildings, December 2013 — 3 hours, open book, non-communicating calculator permitted. Eight problems of 20 points each; candidates answer any five. ASHRAE psychrometric charts (SI and I-P) and an R-134a pressure–enthalpy diagram are appended to the paper. All eight problems are solved below, because the set is intended as a study resource.
Reference texts. ASHRAE Handbook — Fundamentals (Ch. 1 Psychrometrics, Ch. 15 Fenestration, Ch. 16 Ventilation and Infiltration, Ch. 18 Nonresidential Cooling and Heating Load Calculations, Ch. 21 Duct Design); McQuiston, Parker & Spitler, Heating, Ventilating, and Air Conditioning: Analysis and Design, 6th ed.; Çengel & Boles, Thermodynamics: An Engineering Approach, 9th ed. (R-134a property tables); ANSI/ASHRAE Standard 55 Thermal Environmental Conditions for Human Occupancy; ANSI/ASHRAE Standard 62.1 Ventilation for Acceptable Indoor Air Quality. Canadian practice: National Energy Code of Canada for Buildings (NECB) and CSA F280 where a Canadian code reference is required.
Check — table-derived coefficients. This is an open-book paper whose cover page instructs candidates to “submit a clear statement of the assumption(s)” made. Where a solution needs a value that is read from a handbook table or chart rather than given in the question — shading coefficients, air-space thermal resistances, curtain-wall leakage rates, surface-averaged wind pressure coefficients, window and door U-factors, CO2 generation rates — the value used is stated explicitly at the point of use with its source. The method, not the table entry, is what the marks follow; a different edition of the table shifts the arithmetic but not the answer structure.
