Checked 5 November 2026. The Air Brake Program steps and the knowledge test rules are from alberta.ca, read 5 November 2026. The practical test checks and pressure figures are from the published instructor edition of the Air Brake Manual (April 2012); so are the class-size, scoring and other instructor-manual details. Your school may use a newer form, so ask it which procedures apply. Re-check alberta.ca every few months.
The Alberta air brake test is how you get the Q endorsement on your driver’s licence. Most drivers need Q to drive a vehicle with air brakes in Alberta (there are exceptions for learners and some farm vehicles, and some mechanics may skip the training; see below). The usual route is not one test but four steps: a classroom course at a licensed driver training school, practical training, a 15-minute practical assessment on a real air brake vehicle, and a knowledge test at a registry agent. The knowledge test has 30 multiple-choice questions and you need 25 correct; the sixth wrong answer ends it.
If you are working toward a Class 1 licence, the Q endorsement comes first: Alberta says a Class 1 licence cannot be obtained without it. This guide sets out who needs Q, what the course includes, the checks and pressures on the published practical test form, the knowledge test rules, what to study from the Air Brake Manual, and how it all fits with Class 1.
ProSyllabus is an independent study site. It is not part of the Government of Alberta, Transportation and Economic Corridors, any driver training school or any registry agent, and nothing here is the official test. The rules on this page are quoted or summarised from the official Alberta pages and manuals listed at the end.
Government of Alberta, Air Brake Program. Checked 5 Nov 2026.
FreeTests: Air supply: compressor, governor, tanks, dryer · Spring parking and emergency brakes · Trailer brakes and tractor protection · Pre-trip inspection and air brake tests
Canada Air Brake Practice Test: free sample
Answer 4 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 5 minutes · free · no sign-in.
4 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
What the Q endorsement is and who needs it
Alberta’s Air Brake Program page says drivers with Class 1, 2, 3, 4 or 5 licences need the endorsement before operating a vehicle with air brakes, and that you get it by completing an approved air brake course. It shows on your licence card as Q. Alberta says there is no renewal requirement for it, and no road test is needed to get it. You must hold a valid Alberta driver’s licence to take the knowledge test; a suspended licence makes you ineligible.
Whether you need Q depends on the braking system, not only the size of the vehicle. The Commercial Driver’s Guide defines three systems:
| Braking system | What it is | Q endorsement? |
|---|---|---|
| Air brakes | Air from an engine-driven compressor goes through hoses, tanks and valves to all the foundation brakes | Required |
| Air over hydraulic | Some axles have air-actuated foundation brakes, some have hydraulic | Q endorsement or a Class 1 licence required |
| Air actuated hydraulic | The compressor only boosts a system whose foundation brakes are all hydraulic | Not required |
Exceptions and special cases
- Learners: the Commercial Driver’s Guide says you do not need an air brake endorsement while you are learning to drive a vehicle equipped with air brakes. You need Q before you drive an air brake vehicle on your own, and a Class 1 licence cannot be obtained without it.
- Farm vehicles: a single motor vehicle registered as a farm vehicle does not need Q. A farm vehicle combination that needs a Class 1 licence does, and when you apply for the Class 1 you must show proof of air brake training even if the vehicle is farm-registered.
- Mechanics and technicians: heavy equipment technicians, heavy-duty equipment mechanics, truck and transport mechanics and commercial vehicle inspection technicians may be able to take the air brake tests without the classroom or practical training. Alberta asks you to confirm this with Examinations and Licensing first.
- Your licence class: the instructor manual says that, apart from Class 1 (which cannot be issued without it), the Q endorsement is independent of the class of licence you hold.
alberta.ca Air Brake Program (5 Nov 2026); Commercial Driver’s Guide, Chapter 1; Air Brake Manual (instructors).
The four steps to the Q endorsement
| Step | What happens |
|---|---|
| 1. Classroom training | At a licensed driver training school, at least 6.5 hours. Each student gets the Air Brake Manual: A Guide for Students. The April 2012 instructor manual adds that the 6.5 hours do not count registration or breaks, a maximum of 18 students, and hands-on brake adjustment practice on a manual slack adjuster. |
| 2. Practical training | A 15-minute instructor demonstration, then each student practises the air brake pre-trip inspection twice. The April 2012 instructor manual allows at most three students per vehicle and instructor. |
| 3. Practical assessment | One on one, using the Air Brake Practical Test form, within 15 minutes. Only one re-assessment is allowed before additional training is required, and it must be on a different day. When you pass, the school issues the Notice of Air Brake Program Completion. |
| 4. Knowledge test | At any Alberta registry agent, bringing the Notice of Air Brake Program Completion. 30 multiple-choice questions, 25 to pass, electronic and in English only. Pass, and the registry adds Q to your licence. |
The order matters: on the usual route, you bring the completion notice from a licensed school before the registry agent can give you the air brake knowledge test. The April 2012 instructor manual also says the original notice goes to you to show the registry agent together with government-issued photo ID; ask your registry agent what ID it needs today.
FreeTests: Air supply: compressor, governor, tanks, dryer · Spring parking and emergency brakes · Trailer brakes and tractor protection · Pre-trip inspection and air brake tests
Canada Air Brake Practice Test: free sample
Answer 4 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 5 minutes · free · no sign-in.
4 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
The air brake practical test: what you check
The practical assessment is an air brake inspection you do and explain on the vehicle, timed at 15 minutes. The published Air Brake Practical Test form (DPLS0003, in the instructor edition of the Air Brake Manual) groups the checks like this. Your school may use a newer version, so ask which form and procedures apply to your assessment and practise with that.
| Check | How it is done | What must happen |
|---|---|---|
| 1. Tractor protection system | Engine off, key in “run”, wheels chocked. Push the red trailer air supply valve in with the yellow park control valve pulled, then disconnect both trailer air lines. | Low air warning on by 60 PSI (414 kPa); red button pops out at 40–60 PSI (276–414 kPa) or higher; with the foot or hand valve applied, no air leaks from the open trailer service line |
| 2. Park control valve | Push the yellow park control valve in and pump the foot valve. Then reconnect both trailer lines. | Yellow button pops out at 20–45 PSI (138–311 kPa). The manual notes it can happen as low as 10 PSI on new trucks; ask your instructor how your assessment treats that |
| 3. Supply circuit: compressor build-up | Start the engine and run it at a fast idle around 1,200 rpm. | Pressure rises from 50 to 90 PSI (345 to 621 kPa) within 3 minutes |
| 4. Supply circuit: governor | Build pressure to maximum, then pump the service brakes until the governor cuts back in. | Cut-out at 120–135 PSI (828–931 kPa); cut-in 20–25 PSI (138–172 kPa) below the cut-out |
| 5. Air system leaks | Push both park control valves in, rebuild pressure, turn the engine off, then hold a full service brake application for 2 minutes. | After the system stabilizes, no more than 4 PSI (28 kPa) lost for the power unit, plus 2 PSI (14 kPa) for each trailer |
| 6. Brake adjustment | A full service brake application (this also keeps automatic slack adjusters adjusted). | Brake adjustment confirmed on both brakes of one axle |
Air Brake Practical Test form (DPLS0003), in the Air Brake Manual for instructors (April 2012). Bar length shows the top of each stated range in PSI; for the red button, 60 PSI is not a maximum (the form says 40–60 PSI or higher).
How the practical test is scored
The April 2012 instructor manual says each task on the form carries a weight of 5%, 10% or 15%, and the form says that 25% or more marked incorrect is a fail. The manual’s text says 80% is required to pass; because tasks are weighted in steps of 5%, errors of 20% still pass and the next step, 25%, fails. Ask your school how the current form is scored. A retest cannot be on the same day. Alberta’s Air Brake Program page adds that only one re-assessment is allowed before additional training is required; the school and the student decide what that training includes.
An air brake inspection comes up again if you go on to Class 1: at the Class 1 road test you must show the examiner a pre-trip inspection, the coupling and uncoupling procedure and an inspection of the air brake system, pointing to each item and saying what you are checking.
The air brake knowledge test: format and pass mark
| Rule | What Alberta says |
|---|---|
| Questions | 30 multiple-choice questions; the instructor manual says they are chosen at random from a question bank |
| Pass mark | 25 correct (the manual calls it 83%, so at most five wrong) |
| Early end | The test ends automatically at the sixth wrong answer |
| Time limit | None |
| Attempts | No limit on the number of attempts; a retest must be on a different day |
| Format and language | Electronic, English only; paper and translated tests are not available |
| Where | Any Alberta registry agent, with your Notice of Air Brake Program Completion |
| Cost | A government fee and a registry agent service charge, for each attempt. Alberta’s Air Brake Program page does not print the amount, so ask your registry agent |
25 of 30 is about 83%, not 80%: at 80% you could get six wrong, but the sixth wrong answer ends the test.
The instructor manual encourages students to take the knowledge test shortly after the course. Check that you are ready before you go, because every attempt is charged and a retest must be on another day.
Air Brake Manual topics to study for the knowledge test
None of the Alberta pages we read publishes the test questions or how many come from each topic. This is a study outline, not an official test blueprint: the parts of the Air Brake Manual to learn thoroughly, with the figures the April 2012 instructor edition gives:
| Topic | Know this |
|---|---|
| How brakes work | Brakes turn the energy of motion into heat. Air brakes have brake lag because air must travel through the lines; the longer the combination, the more lag (a triple has the most) |
| Supply circuit | Compressor, governor (cut-out 120–135 PSI, cut-in 20–25 PSI lower), supply (wet) tank, safety valve, air dryer, draining tanks, air brake antifreeze |
| Service circuit | Tanks hold air for at least 12 full service applications on a power unit and 8 on a trailer; a check valve on every service tank; low air warning below 60 PSI; primary and secondary circuits |
| Brake chambers and valves | Chamber size and the air pressure you apply decide the force; typically Type 20 on steering axles and Type 30 on load-bearing axles; relay valves cut brake lag, and their crack pressures set the timing of the brakes along the vehicle |
| Spring park brakes | Applied by springs, released by air; begin to expand at 82–84 PSI, drag at 55–60 PSI, applied firmly by 45–50 PSI; never drive with caged park brakes |
| Trailers and the tractor protection system | Supply (emergency, “E”) and service (“S”) glad hands; the red trailer air supply valve and the tractor protection valve; the manual’s note that CMVSS 121 has required spring park brakes on trailers since 1 January 1976 |
| System failures | What fails, and how to stop, when the supply, primary, secondary or park circuit fails, or a trailer service or supply line ruptures |
| Foundation brakes and adjustment | S-cam drum brakes and slack adjusters, the 1/4 inch (7 mm) minimum lining thickness the manual gives from the CVSA roadside out-of-service criteria, maximum push rod strokes, manual and automatic slack adjusters; almost all runaways come from foundation brake failures |
| Driving with air brakes | ABS warning lights, engine brakes and retarders, bobtail tractors, brake balance on combinations, daily inspections and defects |
The Class 1 knowledge test is a separate test with its own sources: our Alberta Class 1 knowledge test guide covers its format, cost and chapters.
FreeTests: Air supply: compressor, governor, tanks, dryer · Spring parking and emergency brakes · Trailer brakes and tractor protection · Pre-trip inspection and air brake tests
Canada Air Brake Practice Test: free sample
Answer 4 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 5 minutes · free · no sign-in.
4 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
Two worked air brake questions
These original practice examples apply figures from the April 2012 Air Brake Manual to a situation. Try them before you open the answers.
Worked example 1 · Supply circuit: the governor
Using the April 2012 manual’s figures: during your air brake inspection the gauges stop rising at 128 PSI. You pump the service brakes to lower the pressure, and the compressor starts pumping again at 110 PSI. What do these readings tell you?
- (A) Both readings are normal
- (B) The cut-out is too high
- (C) The cut-in is too close to the cut-out
- (D) They prove the compressor takes more than 3 minutes to build from 50 to 90 PSI
Show the answer
Answer: (C) The cut-in is too close to the cut-out. A cut-out of 128 PSI is inside the 120–135 PSI range. But the governor should cut back in 20–25 PSI below the cut-out, which here means between 103 and 108 PSI. At 110 PSI it cuts in only 18 PSI lower, so the governor is out of range. No time is given, so the readings prove nothing about build-up time, which is measured from 50 to 90 PSI.
An original ProSyllabus question written from Alberta’s Air Brake Manual. Not a question from a registry knowledge test.
Worked example 2 · Foundation brakes: push rod stroke
On a standard Type 20 brake chamber on the steering axle, you measure an applied push rod stroke of 1 7/8 inches. What does the April 2012 Air Brake Manual say?
- (A) It is within the limit, because a Type 20 chamber has 2 1/4 inches of total stroke
- (B) It is out of service, because a standard Type 20 is out of service at 1 3/4 inches
- (C) It is out of service only if it is a long stroke chamber
- (D) It needs re-adjusting only at 2 inches
Show the answer
Answer: (B) It is out of service, because a standard Type 20 is out of service at 1 3/4 inches. The manual gives a standard Type 20 chamber a total stroke of 2 1/4 inches (57 mm) but puts it out of service at 1 3/4 inches (45 mm). 1 7/8 inches is past that, so the brake is out of adjustment, even though the driver may not feel any difference in normal braking. The 2-inch limit is for a standard Type 30 chamber.
An original ProSyllabus question written from Alberta’s Air Brake Manual. Not a question from a registry knowledge test.
How the Q endorsement fits with Class 1
For a new Class 1 driver in Alberta, the Q endorsement is part of the route, not an extra:
- Before the licence: the Commercial Driver’s Guide says a Class 1 licence may not be obtained without first qualifying for an air brake endorsement, and alberta.ca says the same.
- Inside the Class 1 Learning Pathway: if you reach the Core Learning Program without a Q endorsement, Alberta adds an 8-hour air brake training course to the program.
- At the road test: the Class 1 road test vehicle must have full air brakes on both tractor and trailer, and you demonstrate an air brake inspection to the examiner.
- Two separate knowledge tests: the air brake test and the Class 1 test are both 30 questions with 25 to pass at a registry agent, but they are separate tests, taken and paid for separately; passing one does not cover the other.
Commercial Driver’s Guide (Spring 2025), Chapter 1; alberta.ca Class 1 Learning Pathway and Air Brake Program, read 5 Nov 2026.
If Q is already on your licence when you reach Core Learning, the extra 8-hour air brake course does not apply. For the Class 1 knowledge test itself, see our Alberta Class 1 knowledge test guide and the worked Alberta Class 1 knowledge test questions.
How to prepare for the air brake test
- Read the Air Brake Manual your school gives you, module by module, and learn the pressures in the chart above until you can say them without notes.
- Practise the pre-trip air brake inspection out loud in the order on your school’s form, so you finish every check well inside 15 minutes.
- As a study method, practise applying the figures to situations: what a gauge reading means, which brakes still work after a failure, and what to do next.
- Practise sets of 30 questions and aim for at least 25 correct; treat six wrong as a fail, as the registry test does. The real test has no time limit.
- Take the knowledge test soon after the course, as the manual suggests, and bring your completion notice and the ID your registry agent asks for.
Try free air brake practice questions
These play in our practice player: press Start, answer them, and the result page explains each answer. They are our own questions written from Ontario’s and Alberta’s manuals, not registry questions and not questions from any provincial test.
FreeTests: Air supply: compressor, governor, tanks, dryer · Spring parking and emergency brakes · Trailer brakes and tractor protection · Pre-trip inspection and air brake tests
Canada Air Brake Practice Test: free sample
Answer 4 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 5 minutes · free · no sign-in.
4 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
Practise for the air brake knowledge test
Our Canada Air Brake Practice Test has eight topic sets: “Brake basics and foundation brakes”, “Air supply: compressor, governor, tanks, dryer”, “Service brakes, chambers and valves”, “Spring parking and emergency brakes”, “Trailer brakes and tractor protection”, “Brake adjustment and slack adjusters”, “Pre-trip inspection and air brake tests” and “Driving, ABS and air system failures”. It also has three 30-question practice tests in the Alberta Q format. All are written from Ontario’s Official Air Brake Handbook and Alberta’s air brake manual. Each answer is explained, and the explanation names the manual it comes from.
See the Canada Air Brake Practice Test. Independent practice; not made or endorsed by the Government of Alberta, any registry agent or any licensing body.
Getting your Class 1 too? The Alberta Class 1 and air brake bundle has this practice test and our Alberta Class 1 knowledge test practice together.
Frequently asked questions
How many questions are on the Alberta air brake test?
The knowledge test has 30 multiple-choice questions and you need 25 correct to pass. It ends automatically at the sixth wrong answer. There is also a practical assessment on the vehicle, timed at 15 minutes.
What is the pass mark for the air brake test in Alberta?
25 out of 30 on the knowledge test, which the Air Brake Manual describes as 83%, allowing five wrong answers. On the practical test, the April 2012 manual requires 80% and its form records a fail at 25% or more marked incorrect; confirm the current scoring with your school.
What is the procedure for the air brake test in Alberta?
Four steps: a classroom course of at least 6.5 hours at a licensed driver training school, practical training on the pre-trip air brake inspection, a one-on-one practical assessment within 15 minutes, and then the knowledge test at a registry agent with your Notice of Air Brake Program Completion.
What kind of questions are on the Alberta air brake knowledge test?
Multiple-choice questions; the April 2012 instructor manual says the 30 are chosen at random from a question bank. Alberta does not set out a topic list on the pages we read; the Air Brake Manual the course gives you covers how air brakes work, the supply and service circuits, brake chambers and valves, spring park brakes, trailers and the tractor protection system, system failures, brake adjustment and driving with air brakes. The Alberta pages we read do not publish the questions.
Is there a time limit on the Alberta air brake knowledge test?
No. Alberta says there is no time limit on the knowledge test and no limit on the number of attempts, but a retest must be on a different day and each attempt is paid for. The 15-minute limit applies to the practical assessment.
How much does the Alberta air brake test cost?
Alberta’s Air Brake Program page says a government fee and a registry agent service charge apply to the knowledge test, for each attempt, but does not print the amount. Ask the school for its course price and your registry agent for the current test charges.
What is the 7-step air brake test?
Alberta’s published practical test form does not use a seven-step label. It groups the checks as the tractor protection system, the park control valve, the supply circuit (compressor build-up and governor), air system leaks and brake adjustment. Use the order on the form your school gives you.
Do I need an air brake endorsement for Class 1 in Alberta?
Yes. A Class 1 licence may not be obtained without first qualifying for the Q endorsement. If you start the Core Learning Program without Q, Alberta adds an 8-hour air brake course.
Does the Q endorsement need renewing?
Alberta says there is no renewal requirement for the Q endorsement, and no road test is needed to get it.
Can I take the Alberta air brake test without the course?
Usually not: the registry needs the completion notice from a licensed school. Alberta says some heavy equipment technicians, heavy-duty and truck and transport mechanics and commercial vehicle inspection technicians may be able to take the air brake tests without the classroom or practical training, after confirming with Examinations and Licensing.
Sources
- official — Government of Alberta: Air Brake Program (course, practical assessment, knowledge test; read 5 Nov 2026)
- official — Government of Alberta: Driver’s knowledge test (30 questions, 25 to pass, once per day, paid each time)
- official — Government of Alberta: Air Brake Manual, a guide for instructors (April 2012; includes the Air Brake Practical Test form DPLS0003)
- official — Government of Alberta: Commercial Driver’s Guide, trucks, buses, emergency responders and taxis (Spring 2025)
- official — Government of Alberta: Class 1 Learning Pathway (8-hour air brake course in Core Learning without a Q endorsement)
- official — Government of Alberta: Upgrade to a commercial licence
official = a document published by the conducting body. reported = a news or coaching site we could not check against an original. Where sources disagree this page says so rather than picking one.
