Gas Fitter Practice · Question
Which of the following is the most common cause of incomplete combustion in a natural gas appliance?
Incomplete combustion occurs due to a lack of oxygen, leading to the production of carbon monoxide.
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Question: Which of the following is the most common cause of incomplete combustion in a natural gas appliance?
Answer options:
- Excessive primary air. ✅ Insufficient air supply.
- High gas pressure.
- A dirty flame sensor.
Correct answer: Insufficient air supply.
Explanation: Incomplete combustion occurs due to a lack of oxygen, leading to the production of carbon monoxide.
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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
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