Pass the NATE Gas Heating certification in 2026 with this full exam guide. Covers AFUE, combustion, gas pressure, ignition systems, heat exchangers, venting, flame sensors, and furnace troubleshooting with correct answers.

NATE Gas Heating Exam with correct
answers 2026

Since-1992,-the-United-States-Department-of-Energy-has-required-that-all-furnaces-sold-and-
installed-from-that-date-on-must-have-an-AFUE-of-no-less-than:



-A:-70%



-B:-75%



-C:-78%



-D:-80%---correct-answers--C:-78%



Many-pre-1992-furnaces-have-efficiencies-around-_______.



-A:-10%



-B:-40%



-C:-60%

,-D:-80%---correct-answers--C:-60%



Today,-furnaces-with-AFUE-ratings-greater-than-_____-are-available.



-A:-85%



-B:-90%



-C:-100%



-D:-110%---correct-answers--B:-90%



A-thermocouple-is-used-with:



-A:-Intermittent-pilot-systems



-B:-Direct-spark-ignition-systems



-C:-Glow-coil-ignition-systems



-D:-Standing-pilot-ignition-systems---correct-answers--D:-Standing-pilot-ignition-systems



The-purpose-of-the-gas-pressure-regulator-is-to:



-A:-Keep-the-color-of-the-flame-constant

, -B:-Keep-the-high-limit-switch-from-tripping



-C:-Maintain-a-constant-gas-pressure-at-the-burner



-D:-Allow-the-gas-valve-to-operate-smoothly-and-accurately---correct-answers--C:-Maintain-a-
constant-gas-pressure-at-the-burner



The-instrument-used-to-measure-outlet-gas-pressure-is-the:



-A:-Velometer



-B:-Anemometer



-C:-Monometer



-D:-Draft-gauge---correct-answers--C:-Monometer



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"---correct-answers--C:-3.5"