If there is too much oil in the combustion process, what adjustment should be made for optimal combustion?

• A. Decrease secondary air
• B. Increase primary air
• C. Adjust the fuel mixture
• D. Reduce fuel line pressure

Answer: (B)

When there is too much oil in the combustion process, the optimal adjustment for achieving efficient combustion is to increase primary air. Primary air is the air that mixes with the fuel before it enters the combustion zone. In cases where there is an excess of oil, the fuel-to-air ratio becomes unbalanced, leading to incomplete combustion, increased emissions, and potential soot formation.

By increasing primary air, the combustion process receives more air to mix with the excess oil. This helps to ensure that all fuel burns more completely, improving efficiency and reducing harmful emissions. It leads to a more effective combustion process by allowing for better mixing of fuel and air, thus facilitating more thorough combustion.

The other adjustments, while potentially relevant in different contexts, may not address the immediate need to balance the fuel mixture with more air. Adjusting the fuel mixture, for instance, is certainly important but is not necessarily the first action to take when addressing excess oil specifically.