NATE - North American Technician Excellence Practice Test
NATE Oil Heating 3
What does a barometric draft control (draft regulator) do in an oil heating system?
Select your answer
A
Boost flue draft in low-pressure conditions
B
Maintain constant flue draft by admitting dilution air when draft exceeds setpoint
C
Prevent flue gases from entering the living area
D
Control combustion air to the burner
Hint