Which of the following best describes the process initiated by the ignition transformer?

The ignition transformer plays a critical role in the operation of an oil burner by creating the necessary electrical spark to ignite the oil within the combustion chamber. It generates a high-voltage electrical charge, which, when directed to the oil mist released from the burner nozzle, causes a spark. This spark ignites the oil, allowing for the combustion process to begin efficiently.

While increasing fuel pressure, propagating heat, and filtering air are important functions in the overall operation of heating systems, they do not directly involve the ignition transformer. Its primary function is solely focused on initiating combustion through the ignition of the oil. Hence, the best description of the process initiated by the ignition transformer is that it ignites the oil.