Confined Space study guide and books
Start with the free official guide — it is what the test is written from. Books only help if you want printed practice or a structured course.
- 4 official
Free
Official guide
Guideline for working in confined spaces
Ontario Ministry of Labour, Immigration, Training and Skills Development · Free online
The ministry's question-and-answer guide to every section of Ontario's Confined Spaces Regulation, including the oxygen scale, testing decision charts, hot work and rescue. Most of our questions cite it.
O. Reg. 632/05: Confined Spaces
Province of Ontario · Free online
The regulation itself: definitions, program, assessment, plan, permits, rescue, isolation, attendants, testing, flammable limits, ventilation and records.
OSH Answers: Confined Space fact sheets
Canadian Centre for Occupational Health and Safety (CCOHS) · Free online
National fact sheets on what a confined space is, its hazards, atmospheric testing rules by province, permits, attendants and rescue. Good for a quick review.
OHS Regulation Part 9: Confined Spaces
WorkSafeBC · Free online
British Columbia's rules, including hazard levels, 20-minute pre-entry testing, standby persons and rescue agreements.