G2 Gas Fitter Practice Exam

The type of pilot that is automatically lit each time there is a call for heat and burns during the entire duration the main burner is firing is the intermittent pilot. This pilot system ignites only when the heating appliance requires heat, making it more energy-efficient compared to other pilot types. When the thermostat signals a demand for heat, the electronic ignition system activates the intermittent pilot, which then lights the main burner. Once the desired temperature is reached and the call for heat ceases, the intermittent pilot extinguishes, conserving gas.

This contrasts with the standing pilot, which remains lit continuously and can lead to higher gas consumption. A protected pilot refers to a design that offers additional resistance to outside influences, but it does not specifically tie to how it ignites. The electronic pilot also operates differently, as it requires electronic components to initiate lighting rather than being automatically lit by a call for heat. Understanding the mechanism behind these types of pilots is essential for gas fitters to ensure efficiency and safety in heating systems.