G2 Gas Fitter Practice Exam

The correct air-to-gas ratio for propane is 1 to 10. This means that for every one part of propane, there should be ten parts of air for optimal combustion. This specific ratio ensures that propane combusts efficiently, producing a clean burn with minimal emissions. Understanding this ratio is essential for gas fitters to ensure safety and efficiency when working with propane appliances.

If the ratio is too lean (more air than the ideal proportion), it can lead to incomplete combustion, which can produce carbon monoxide and decrease the overall heating efficiency of the system. Conversely, too rich a mixture (less air in comparison to propane) can result in soot production and inefficient burning. Therefore, maintaining the correct air-to-gas ratio is crucial for safe and effective operation of propane appliances.