NATE Study Guide 2026
Everything you need to pass the NATE exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 NATE Exam Format at a Glance
📚 NATE Topics to Study (21)
✍️ Sample NATE Questions & Answers
1. What component in an oil burner atomizes the fuel oil and mixes it with air for combustion?
The nozzle atomizes oil into a fine spray at a precise angle and pattern, mixing it with combustion air for efficient burning.
2. What is the correct method for measuring total external static pressure (TESP) on an air handler?
TESP = supply static pressure minus return static pressure (both measured close to the air handler), giving total system resistance.
3. What type of compressor is most commonly used in large commercial refrigeration rack systems?
Semi-hermetic reciprocating compressors are widely used in commercial rack systems because they are serviceable and available in a wide range of capacities.
4. What is the purpose of the vent pressure switch on a two-stage condensing furnace?
The vent pressure switch proves adequate draft by sensing the negative pressure created by the inducer blower before the gas valve is energized.
5. What is the standard line voltage for most residential HVAC equipment in the United States?
Most residential HVAC equipment in the US operates on 240V single-phase 60Hz power.
6. What is the typical target evaporator superheat range for a fixed-orifice metering device system?
A fixed-orifice system typically targets 10–18°F of superheat at the evaporator outlet for proper refrigerant feed.