What mechanism is used to prevent the condensation of moisture in the combustion process?

The correct answer involves the oil deaerator, which plays a critical role in the combustion process by helping to prevent the condensation of moisture. During the combustion of fuel oil, any moisture present can lead to several undesirable effects, including corrosion and reduced efficiency.

An oil deaerator works by removing air and other gases from the oil before it enters the combustion chamber. This step is essential because excess air can lead to incomplete combustion and may introduce additional moisture, which could condense during the cooling process. By ensuring that the oil delivered to the burner is as free from air and moisture as possible, the oil deaerator optimizes combustion efficiency and minimizes moisture condensation.

In contrast, other components listed serve different functions. A fuel line filter primarily ensures that only clean fuel reaches the burner, a heat exchanger is designed to transfer heat effectively and does not specifically target moisture, and a cad cell serves as a flame sensor to ensure that the combustion is occurring properly. None of these directly address the prevention of moisture condensation in the combustion process in the same manner as an oil deaerator.