24-Bld-A4 Building Environmental Control Systems · May 2017
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams May 2017 — 07-Bld-A4, Building Environmental Control Systems (Building Engineering). 3-hour closed-book exam: Section 1 (four 20-mark essay/calculation questions) + Section 2 (ten 2-mark multiple-choice questions).
Reference texts: ASHRAE Handbook — Fundamentals (2021 ed.); ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality (2022 ed.); McQuiston, Parker & Spitler, Heating, Ventilating, and Air Conditioning: Analysis and Design (6th ed.); National Building Code of Canada 2020 (NBCC); National Energy Code of Canada for Buildings 2020 (NECB).
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
Given/Find. A fan-coil unit (FCU) is a small terminal device (coil + fan, no refrigeration compressor of its own) that conditions air locally from a central chilled/hot-water or refrigerant supply. Photos (a), (b) and (c) show recognizable FCU form factors (a coil/blower block, a concealed ducted FCU, and a ceiling cassette FCU). Photo (d) shows a large outdoor packaged unit with finned condenser coils and visible compressors — the form factor of an air-cooled chiller/condensing unit, not a terminal FCU.
| Answer: (d) — the outdoor air-cooled chiller/condensing unit is not a FCU. |
