Gas Fitter Practice · Question
Yellow / sooty flame indicates:
Adjust air/fuel or service burner.
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Question: Yellow / sooty flame indicates:
Answer options: ✅ Incomplete combustion
- Proper combustion
- Lean mix
- Cold start
Correct answer: Incomplete combustion
Explanation: Adjust air/fuel or service burner.
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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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