M2 · area 05 · subtopic 0501
Combustion Air
14 percent of the M2 Commercial Mechanical Inspector exam. At 50 questions, that is roughly 7 to 8 questions, each with about 144 seconds of budget including the lookup.
- Exam
- M2
- Area
- Combustion Air
- Weight
- 14%
- Questions
- ~7 to 8
What this subtopic covers
Proper air supply sources for fuel-burning appliances, size and location of openings, and combustion air duct materials and installation.
How to drill it
- Find the chapter of the International Mechanical Code that carries this subject and read it once for structure, not retention: what lives here, what gets sent elsewhere, which tables exist.
- Write your own plain-language phrases for what this subtopic covers, then note the code's terms beside them. Mismatches between the two columns are exactly where exam questions cost you time.
- Run timed lookups: pick a requirement named in the descriptor above, start a stopwatch, find the governing text in your book, stop. Log the seconds. Past two minutes is a miss even when the answer is right.
- Weight your reps to the number above. Roughly 7 to 8 questions means this subtopic deserves a dedicated drill session of its own.
2024 IRC Fast-TabsPre-printed tabs for the 2024 edition. Place them yourself; the placement is the study.Check priceThe rest of area 05: Combustion Air (14%)
| Subtopic | Weight |
|---|
The kit that goes on the table
2024 IRCThe book itself
2021 IRCIf you register on 20212024 Fast-TabsPlace them yourself
Construction Master ProFeet-inch math, no errorsMatch the book and tabs to the edition you register for.Confirm which, first.
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