NATE GAS HEATING NEWEST PREP EXAM 2026 | ALL QUESTIONS AND VERIFIED ANSWERS | RATED A + | NEW AND REVISED

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NATE GAS HEATING NEWEST PREP
EXAM 2026 | ALL QUESTIONS AND
VERIFIED ANSWERS | RATED A + | NEW
AND REVISED


Under ideal conditions natural gas has an ignition temperature of
_______ degrees F and a burning temperature of ________ degrees F.


A: 800 degrees, 1000 degrees


B: 1,100 degrees, 3,500 degrees


C: 1,100 degrees, 5,000 degrees


D: 2,500 degrees, 8,000 degrees - ANSWER- B: 1,100 degrees, 3,500
degrees


Propane and butane are both:


A: Lighter than air


B: Heavier than air

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C: Weigh the same as air


D: None of the above - ANSWER- B: Heavier than air


In order to achieve complete combustion with natural gas, each cubic
foot of gas must combine with no less than ______ cubic feet of air with
an additional 5 cubic feet of extra air to ensure there is enough oxygen
for complete combustion.


A: 5 cubic feet
B: 10 cubic feet
C: 15 cubic feet
D: 20 cubic feet - ANSWER- B: 10 cubic feet


The three elements of combustion are:


A: Fuel, oxygen and ignition


B: Nitrogen, oxygen and heat


C: Air, fuel and oxygen


D: Air, fuel and nitrogen - ANSWER- A: Fuel, oxygen and ignition

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Which of the following is a natural result of combustion?


A: Water vapor


B: Carbon monoxide


C: Carbon dioxide


D: All of the above - ANSWER- D: All of the above


Primary air is air that:


A: Is mixed with the fuel before the fuel reaches the burner


B: Is mixed with the fuel at the burner after the fuel has ignited


C: Remains unused after the combustion process is complete


D: Enters the draft diverter and goes up the stack with the products of
combustion - ANSWER- A: Is mixed with the fuel before the fuel
reaches the burner


Secondary air is air that: