Massachusetts Oil Burner License Practice Test

What is a potential consequence of sulfuric acid in combustion gases?

1. Improved fuel efficiency

2. Corrosion of flue lines

3. Enhanced burner performance

4. Reduction of heat exchanger output

The correct answer is: Corrosion of flue lines

The presence of sulfuric acid in combustion gases is primarily a result of the combustion of sulfur-containing fuels. When these fuels burn, the sulfur oxidizes and can combine with water vapor in the exhaust gases to form sulfuric acid. This acid is highly corrosive and can damage various components of a heating system, particularly the flue lines. Over time, the corrosion caused by sulfuric acid can lead to significant deterioration of these components, which can ultimately result in leaks, increased maintenance costs, and the need for early replacement of affected parts. The integrity of the venting system is crucial for safe operation, as corrosion can compromise the system's ability to safely vent combustion gases outside. In contrast, improved fuel efficiency, enhanced burner performance, and reduced heat exchanger output are not direct consequences associated with sulfuric acid in combustion gases. Instead, these aspects relate to the efficiency and effectiveness of the heating system itself, which can be negatively impacted by corrosion and damage caused by harmful substances in the exhaust.