What is the function of an intermittent pilot?

The function of an intermittent pilot is to provide ignition for the main burner when it is needed, and it typically does this by only being active during the main burner operation. An intermittent pilot system ignites the main gas burner only when the demand for heat arises, thereby enhancing safety and efficiency by preventing gas from continuously flowing without being ignited.

In many systems, the intermittent pilot will ignite just prior to the main burner being activated, and once the main burner is lit, the pilot stays on briefly to ensure stable operation before it turns off again, which helps to prevent unnecessary gas consumption and reduce the risk of gas leakage. This operation is particularly focused on ensuring that the main burner has a reliable source of ignition when it is activated.

The other options imply a continuous operation or an incorrect role of the pilot, which does not align with the purpose of an intermittent pilot system. Hence, the role of staying on during the main burner operation accurately describes the intended function of an intermittent pilot.