ASE T7 HVAC practice test
The T7 test covers heating and air conditioning on medium and heavy trucks: the same refrigeration fundamentals as A7 plus truck-scale details — long refrigerant lines, sleeper units, and engine-cooling interactions. Required for Master Truck status.
On a hot day, a truck A/C shows very high high-side pressure and mediocre cooling that worsens at low road speed. The condenser fins are found packed with bugs and road debris. Technician A says the plugged condenser explains the readings. Technician B says the fan clutch or engine fan operation should also be verified. Who is correct?
How the T7 test works
40 scored questions
+ ~10 unscored research questions
60 minutes
computer-based, at a test center
$62 per test
plus one $34 registration fee per order
Valid 5 years
then a shorter recertification test
ASE does not publish one universal passing percentage; the passing standard is set by test. TorquePrep uses 80% as a conservative practice target, not as an official ASE cut score. The certificate is issued once ASE verifies your required work experience.
What the T7 test covers
The official task list for T7 HVAC Systems (Medium-Heavy Truck) breaks down into these content areas — the practice bank above draws from all of them:
- A/C system diagnosis — gauge readings, poor cooling, compressor and clutch
- Refrigeration components — condenser, evaporator, expansion devices, driers
- Heating and engine cooling — heater circuits, valves, blend doors
- Operating systems and controls — blower circuits, sleeper/auxiliary HVAC
- Refrigerant recovery, recycling, and handling
Frequently asked
- How many questions are on the ASE T7 test?
- The T7 test has 40 scored questions plus about 10 unscored research questions, with a 60-minute time limit.
- Is T7 very different from A7?
- The refrigeration fundamentals are identical; T7 adds truck-specific systems such as sleeper HVAC units, longer line runs, and heavy-duty heater/coolant plumbing.
- Do I need an EPA credential to do A/C work?
- Yes — EPA Section 609 certification is the separate legal requirement for buying refrigerant and servicing mobile A/C. T7 is the ASE competency credential; technicians typically hold both.
Exam length, timing, fees, and content areas checked September 11, 2026 against the official ASE test table and ASE study guides.
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