Gas Fitter Practice · Question
What is the maximum permissible concentration of carbon monoxide (CO) in flue gases for a Category I natural draft appliance, as per CSA B149.1?
CSA B149.1 specifies maximum allowable carbon monoxide levels in flue gases to ensure safe operation. Exceeding this limit indicates incomplete combustion and a
Start free practice for Gas Fitter Practice
200 questions · no signup required · 40 free questions per day
Question: What is the maximum permissible concentration of carbon monoxide (CO) in flue gases for a Category I natural draft appliance, as per CSA B149.1?
Answer options: ✅ 200 ppm
- 400 ppm
- 800 ppm
- 1200 ppm
Correct answer: 200 ppm
Explanation: CSA B149.1 specifies maximum allowable carbon monoxide levels in flue gases to ensure safe operation. Exceeding this limit indicates incomplete combustion and a hazard.
Start free practice for Gas Fitter Practice
200 questions · no signup required · 40 free questions per day
More about Gas Fitter Practice
Related Questions
- What is the maximum allowed pressure for a propane system supplying a residential appliance?
- When installing a gas outdoor appliance, what is the minimum required clearance from an opening into a buildin
- Which code specifies the requirements for the installation of propane-burning appliances and equipment?
- What is the maximum allowed pressure drop for gas piping within a building, from the point of delivery to the
- Which of the following is the primary purpose of a drip leg (sediment trap) in a gas piping system?
- What is the minimum air-to-gas ratio required for complete combustion of natural gas?
More for Gas Fitter Practice candidates
Practice tests
Question explanations
- What is the maximum allowed pressure for a propane system supplying a residential appliance?
- When installing a gas outdoor appliance, what is the minimum required clearance from an opening into a buildin
- Which code specifies the requirements for the installation of propane-burning appliances and equipment?
- What is the maximum allowed pressure drop for gas piping within a building, from the point of delivery to the
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Gas Fitter Practice Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.