BOC Study Guide 2026
Everything you need to pass the BOC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 BOC Exam Format at a Glance
📚 BOC Topics to Study (21)
✍️ Sample BOC Questions & Answers
1. In a building's domestic hot water system, what is the purpose of a recirculation loop?
A recirculation loop continuously circulates hot water through the distribution piping so occupants get near-instant hot water at any fixture.
2. Why is proper ventilation important in maintaining indoor air quality?
Proper ventilation helps remove indoor pollutants and brings in fresh air, improving overall air quality.
3. What does 'TDS' stand for in boiler water treatment, and why is it monitored?
Total Dissolved Solids (TDS) measures the concentration of minerals and impurities in boiler water; high TDS causes scale, foaming, and carryover, controlled through blowdown.
4. Which water treatment chemical is commonly added to a closed hydronic heating or chilled water loop to prevent internal pipe corrosion?
Closed loop systems use corrosion inhibitors to form a protective film on metal pipe interiors, preventing oxidation and extending system life.
5. What does a Variable Air Volume (VAV) system do?
VAV systems adjust the amount of air delivered to spaces based on cooling or heating needs, improving efficiency.
6. What is the primary benefit of implementing energy conservation strategies in buildings?
Energy conservation helps reduce operating costs, environmental impact, and improves building efficiency.