Gas Fitter Practice Test

When converting an oil furnace to gas, what type of atmospheric burner can be used?

1. A. Burner tray

2. B. In shot

3. C. Ribbon burner

4. D. Primary air fan assist burner

The correct answer is: B. In shot

In the context of converting an oil furnace to gas, the in-shot burner is an appropriate choice due to its design and functionality. The in-shot burner operates by drawing gas into a throat where it mixes with air, creating a precise and efficient flame. This type of burner is particularly advantageous in retrofit applications, such as converting from oil to gas, because it provides a good balance of combustion efficiency and control over the flame pattern. Using an in-shot burner allows for a compact design that fits well within the existing furnace infrastructure. It can effectively utilize the gas fuel while maintaining the necessary operational characteristics, making it a popular choice in these conversions. Other types of burners, like the burner tray and ribbon burner, may not offer the same level of efficiency or compatibility during the conversion process, as they typically serve different combustion purposes or may require more extensive modifications to work correctly with gas. Additionally, a primary air fan assist burner introduces complexity that might not be necessary for a straightforward conversion, making the in-shot burner the most suitable option in this scenario.