Air brakes for classes 1, 2 and 3 — based on the SAAQ guide “Conduire un véhicule lourd”
Practice on the go and jump straight back to where you left off.
About the exam
In Québec, the mention F (F endorsement) is added to a class 1, class 2 or class 3 licence: it is required to drive a heavy vehicle equipped with an air brake system. To get it, you must pass the knowledge test on air brakes, the practical circle check test and the practical road test, using a vehicle with air brakes of the highest class requested.
According to SAAQ policy PO-PM 05 (December 2025), the mention F knowledge test has 20 questions, and you need 15 correct answers to pass (75%). The retake delay after a failure is 7 days. The mention F tests can be taken at the same time as those for the class; if they are taken separately, fees apply for each session.
ExamHub's free test includes 120 original questions (a bank written in French, with an English translation) drawn from the guide “Conduire un véhicule lourd” (2024), the guide “La ronde de sécurité” and the Règlement sur les normes de sécurité des véhicules routiers. These same questions make up the “mention F” section of the class 1, class 2 and class 3 tests.
What's covered
The topics follow chapter 5 of the SAAQ guide (air brakes), chapter 4 (downgrades, emergency stops, ABS) and the circle check.
Try a few
Five examples from the question bank, with the answer and explanation.
Why: The compressor starts when the service reservoir pressure is below 724 kPa and stops supplying them at 862 kPa, a difference of 138 kPa.
Why: The wheels begin to lock at about 483 kPa; below 242 kPa, all the air is released and the emergency brake is fully applied.
Why: With ABS, press the pedal fully and hold the pressure: the system controls the braking by producing a pumping effect itself.
Why: For a single-unit vehicle, a leak is minor above 20 kPa per minute and major above 40 kPa; 35 kPa is therefore a minor defect.
Why: Release the pedal when the speed is about 10 km/h below the speed judged safe, which is 40 km/h here, then repeat as needed.
FAQ
20 questions; you need 15 correct answers (75%).
It is added to a class 1, 2 or 3 licence and allows you to drive a heavy vehicle equipped with an air brake system.
7 days before retaking the mention F knowledge test (SAAQ policy PO-PM 05).
Yes. If they are taken separately, fees apply for each testing session.
How air brakes work: compressor and governor, reservoirs, service, parking and emergency brakes, the low air pressure warning, ABS, downgrades and brake checks during the circle check.
Yes. The bank was written in French from the SAAQ guide, then translated into English; use the language selector at the top of the page.
No. These are original practice questions written from the SAAQ's free publications.