Nate Gas Heating Exam Questions With Correct Answers 2023

The purpose of the combustion blower is to: A: Cause an adequate amount of oxygen-rich air to mix with the fuel for better combustion B: Push the products of combustion out of the building C: Prevent carbon monoxide from entering the heat exchanger D: Give the larger blower motor a rest {Ans: A: Cause an adequate amount of oxygen-rich air to mix with the fuel for better combustion}The regulator on a natural gas furnace should be adjusted to supply _____ inches of pressure at the burners. A: 11" B: 10" C: 3.5" D: 2" {Ans: C: 3.5"}A lifting burner flame is usually caused by: A: A new ignitor that has not been broken in B: High gas pressure and/or too much primary air C: Low gas pressure and/or not enough primary air D: Blockage in the flue {Ans: B: High gas pressure and/or too much primary air}The flame sensor: A: Is a thick ceramic rod that senses the heat of the flame and causes the rod to expand and signal the solid state flame board that a flame is present B: Is a small-diameter conducting rod that senses when a flame is present because a current flow