SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

A standing-pilot gas furnace proves the pilot before the main burner can open by using which device?

A thermocouple or thermopile heated by the pilot flame that holds the pilot/safety valve open A 240-volt sequencer only A sail switch in the supply duct A humidistat

Correct Answer:

A thermocouple or thermopile heated by the pilot flame that holds the pilot/safety valve open

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