Which of the following is NOT considered a pilot for a gas burner?

The option identified as manual is not considered a pilot for a gas burner because it refers to a method of operation rather than the type of pilot itself. In the context of gas burners, pilots serve specific roles in safely igniting the main gas flow.

The interrupted pilot, intermittent pilot, and continuous pilot options all describe distinct types of pilots that are used in gas burning applications.

An interrupted pilot typically ignites the main burner only when the system calls for heat, and then it turns off when the main burner is no longer needed, conserving gas and increasing safety. The intermittent pilot operates in a similar way, lighting only when necessary and not being continuously on, while a continuous pilot remains lit at all times to ensure that the main burner can ignite instantly when needed.

In contrast, the term manual describes a control mechanism in which the user must actively turn the gas on or off, and it does not represent a pilot design. Thus, the correct identification of 'manual' as not being a pilot type highlights the distinction between these terms within the context of gas burner operation.