FREE NATE Knowledge Questions and Answers 2026 October
🗨️ Free NATE Knowledge Questions and practice test with questions and answer explanations. Prepare for the 2026 October exam with instant scoring.
Sample NATE - North American Technician Excellence Practice Questions
Try these questions from our free NATE - North American Technician Excellence practice tests. The correct answer and an explanation follow each question.
What is the purpose of the heat exchanger in a gas furnace?
- A. Mix combustion gases with supply air
- B. Transfer heat from combustion gases to the circulating air without mixing them
- C. Remove moisture from combustion products
- D. Regulate gas pressure to the burners
Answer: B. Transfer heat from combustion gases to the circulating air without mixing them
The heat exchanger keeps combustion products separated from conditioned air while allowing heat transfer through the metal walls.
What is the standard gas manifold pressure for natural gas residential furnaces in the US?
- A. 7–14 inches WC
- B. 3.2–3.8 inches WC
- C. 0.5–1.0 PSI
- D. 10–12 inches WC
Answer: B. 3.2–3.8 inches WC
Natural gas furnace manifold pressure is typically set at 3.2–3.8 inches water column (around 3.5 inches WC nominal).
What does HSPF2 measure for a heat pump?
- A. Cooling efficiency over a season
- B. Heating efficiency measured as total heat output divided by total electrical energy over the heating season
- C. Defrost cycle frequency
- D. Compressor efficiency ratio
Answer: B. Heating efficiency measured as total heat output divided by total electrical energy over the heating season
HSPF2 (Heating Seasonal Performance Factor 2) rates heating efficiency; higher values indicate more efficient heating performance.
On a cooling thermostat, which terminals are energized when the system is calling for cooling?
- A. R and W
- B. R and Y
- C. R and G
- D. R and O
Answer: B. R and Y
During a cooling call, the Y (compressor) terminal is energized along with R (power), activating the compressor contactor.
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About the Author
NATE Certified HVAC Technician & Licensing Exam Trainer
Universal Technical InstituteMike Johnson is a NATE-certified HVAC technician and EPA 608 universal-certified refrigerant handler with a Bachelor of Science in HVAC/R Technology. He has 19 years of commercial and residential HVAC installation and service experience and specializes in preparing technicians for NATE certification, EPA 608, A2L refrigerant safety, and state HVAC contractor licensing examinations.
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