The oil burner in a conventional furnace requires oil to be what before it can be ignited?

The correct response is that the oil must be atomized before it can be ignited. Atomization is the process of breaking the liquid oil into fine droplets, which allows for better mixing with air. This is crucial for efficient combustion, as smaller droplets allow for a more effective reaction with oxygen, thereby improving ignition and burn quality.

In an oil burner, the atomization typically occurs through the use of a specialized nozzle that creates a fine mist of oil. This is essential because if the oil remains in larger chunks or as a liquid, it would not ignite as effectively, leading to incomplete combustion, soot production, or even failure to start. Atomized fuel ensures that the burner operates efficiently and effectively, providing optimal heating for the system.

Other processes, such as pumping and heating, are also important in the operation of an oil burner but do not directly relate to the ignition process. Pumping transports the oil from its storage location to the burner, while heating can help improve fluidity and facilitate atomization. Nevertheless, without proper atomization, ignition cannot occur effectively. Filtering is essential for preventing contaminants from entering the system, but it does not play a direct role in the ignition process.