Checked 6 November 2026. The Alberta knowledge test rules are from alberta.ca, read 6 November 2026. The Ontario figures are from the Official Air Brake Handbook on ontario.ca, read 5 November 2026. The Alberta inspection figures are from the published instructor edition of Alberta’s Air Brake Manual (April 2012); your school may use a newer form. Re-check the provincial pages every few months.
An air brake practice test is only useful if it trains you for the real one. Alberta publishes its rules in detail: the air brake knowledge test has 30 multiple-choice questions, you need 25 correct, and the test ends at the sixth wrong answer. There is no time limit. Ontario gives its air brake (Z) knowledge test at DriveTest centres and points you to its Official Air Brake Handbook, but the Ontario pages we read do not say how many questions it has.
On this page you can try 4 practice questions free in our test player, learn how to mark a 30-question practice test the way Alberta marks the real one, and see the figures where Alberta’s and Ontario’s manuals give different answers. That last part matters: a question about air loss or the governor can have a different right answer in each province.
ProSyllabus is an independent study site. It is not part of the Government of Alberta, the Ontario Ministry of Transportation, DriveTest, any registry agent or any driver training school, and nothing here is an official test. The test rules on this page are quoted or summarised from the official pages and manuals listed at the end.
Government of Alberta, Air Brake Program. Checked 6 Nov 2026.
Try 4 air brake practice questions free
These play in the same player as the full practice tests: press Start, answer them, and the result page shows each answer with the official source it comes from. They are our own questions, written from Alberta’s air brake manual and Ontario’s Official Air Brake Handbook. They are not questions from any government test. They are free, with no payment.
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.
How the real air brake knowledge test works
Alberta (Q endorsement)
| Rule | What Alberta says |
|---|---|
| Questions | 30 multiple-choice questions |
| Pass mark | 25 correct |
| Early end | The test ends automatically if 6 questions are answered incorrectly |
| Time limit | None |
| Attempts | No limit; a retest must be on a different day |
| Format and language | Electronic, English only; no paper or translated tests |
| Where and when | At an Alberta registry agent. On the usual route you first pass an approved air brake course and practical assessment, and bring your Notice of Air Brake Program Completion. A government fee and a service charge apply |
The course, the 15-minute practical assessment and how Q fits with a Class 1 licence are in our Alberta air brake (Q) test guide.
Ontario (Z endorsement)
Ontario says you get the Z endorsement either through an air brake endorsement course or by taking the tests at a DriveTest centre. Ontario’s page says you take an air brake knowledge test at a DriveTest centre and can then book a practical test, with a fee for each. Ontario points you to its Official Air Brake Handbook to prepare; you can read it online or buy a hard copy. Since 1 September 2023, the air brake knowledge test is no longer needed to renew a Z endorsement: you complete an air brake learning module (online, or in person at DriveTest if you cannot do it online). Commercial-class drivers still take the vision and commercial class knowledge tests in person, and from age 80 the module and a practical test are needed each year. The ontario.ca pages we read do not give the number of questions or the pass mark, so do not trust a practice site that states them as Ontario rules. The steps, the practical test and renewal are in our Ontario air brake (Z) test guide.
Other provinces
This page states rules for Alberta and Ontario only, because those are the official pages we read. If you are in another province, check its licensing office for the course and test rules, and study your province’s official air brake manual; inspection procedures and figures can differ even between Alberta and Ontario, as the table below shows. Our province-by-province air brake endorsement guide covers the endorsement routes.
How to mark a 30-question practice test the Alberta way
Alberta’s rule changes how you should read a practice score. On a 30-question test, 25 is the pass mark, so you can afford five wrong answers, not six. The sixth wrong answer ends the test, even if it is question 7 and you know the rest. Our three full practice tests let you finish all 30 questions so that you see every explanation, so mark yourself like this:
| Wrong answers in 30 | Your score | On the real Alberta test |
|---|---|---|
| 0 to 2 | 28 to 30 | Pass, with room to spare |
| 3 to 5 | 25 to 27 | Pass, but you are close to the limit: at 5 wrong, one more mistake would fail you. Study the topics you missed |
| 6 or more | 24 or less | Fail. The test would have stopped at your sixth wrong answer |
Two more habits help. First, count where your sixth wrong answer came: if it is early in the test, you would have walked out before reaching questions you could answer. Second, the real test has no time limit, so do not rush. Our 30-question tests show a 30-minute practice clock only as a guide to pace.
Same question, different answer: Alberta and Ontario figures
Practice questions often ask for a number. Alberta’s published Air Brake Practical Test form (DPLS0003) and Ontario’s handbook do not always use the same test, so the right number depends on your province. Learn the figures from your own province’s manual; these are the ones that differ most.
| Check | Alberta (Air Brake Manual, April 2012) | Ontario (Official Air Brake Handbook) |
|---|---|---|
| Governor | Cut-out at 120–135 PSI (828–931 kPa); cut-in 20–25 PSI below the cut-out | Cut-out and cut-in within the manufacturer’s range, normally 20–25 PSI apart. Defective if cut-out is above 145 PSI (1000 kPa) or below 100 PSI (690 kPa), or cut-in is below 80 PSI (552 kPa) |
| Air pressure build-up | From 50 to 90 PSI (345 to 621 kPa) within 3 minutes, at a fast idle around 1,200 rpm | From 85 to 100 PSI (587 to 690 kPa) within 2 minutes, at 600 to 900 rpm |
| Air loss with the brakes applied | Engine off, full service application held for 2 minutes: no more than 4 PSI (28 kPa) for the power unit, plus 2 PSI (14 kPa) for each trailer, after the system stabilizes | Engine off, brake pedal fully applied, loss over 1 minute: no more than 3 PSI (21 kPa) for a straight truck, tractor or bus; 4 PSI (28 kPa) for a tractor and trailer; 6 PSI (41 kPa) for a tractor and two or more trailers |
| Low air pressure warning | Comes on by 60 PSI (414 kPa) | Must come on before 55 PSI (380 kPa); most come on at 60 PSI (414 kPa) or higher |
Our practice questions say which province’s manual each figure comes from, so you can tell which number to learn.
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 full practice test covers
The full practice test has three 30-question tests in the Alberta format, plus a set for each part of the air brake system. The chart shows how many questions each topic set has:
Our own practice sets, counted on the kit page on 6 Nov 2026. The three 30-question practice tests come on top of these. This is our split, not an official test blueprint: the provincial pages and manuals we read do not give a topic-by-topic split of the real test.
Two worked air brake questions
These two original examples show the kind of thinking the tests reward: applying a rule to a situation, not just remembering it. Try them before you open the answers.
Worked example 1 · Governor: same readings, two provinces
During an air brake check, the gauges stop rising at 140 PSI, and the compressor starts pumping again at 118 PSI. These readings are inside the vehicle maker’s stated range. Which statement is correct?
- (A) The readings are defective under both provinces’ manuals
- (B) They are within the limits in Ontario’s handbook, but the cut-out is above the range on Alberta’s published form
- (C) They are within the range on Alberta’s published form, but defective under Ontario’s handbook
- (D) The cut-in is too close to the cut-out under both manuals
Show the answer
Answer: (B) They are within the limits in Ontario’s handbook, but the cut-out is above the range on Alberta’s published form. Ontario’s handbook calls the system defective only if cut-out is above 145 PSI or below 100 PSI, or cut-in is below 80 PSI; 140 and 118 are inside those limits, and the stem says they are inside the maker’s range too. The gap is 22 PSI, inside the normal 20–25 PSI in both manuals. But Alberta’s published practical test form expects the governor to cut out at 120–135 PSI, and 140 is above that. So the same gauge readings need a different answer in each province.
An original ProSyllabus question written from Ontario’s Official Air Brake Handbook and Alberta’s Air Brake Manual (April 2012). Not a question from any government test.
Worked example 2 · The Alberta test rules
You are taking Alberta’s air brake knowledge test. After 18 questions you have 13 right and 5 wrong. What do you need on the last 12 questions to pass?
- (A) All 12 correct
- (B) At least 10 of the 12 correct
- (C) At least 11 of the 12 correct
- (D) Nothing: you have already failed
Show the answer
Answer: (A) All 12 correct. You need 25 correct. You have 13, so you need 12 more, which is every remaining question. There is also no room for one more mistake: a sixth wrong answer ends the test at once. You have not failed yet, because only five answers are wrong.
An original ProSyllabus example based on the knowledge test rules on alberta.ca. Not a question from any government test.
A simple plan to pass the air brake knowledge test
- Read your province’s official air brake manual or handbook (or the one your school gives you) once, start to finish. Then take the free questions above to see where you stand.
- Work through one topic set a day. For each wrong answer, read the explanation and look up the source it names in your manual.
- Learn your own province’s figures (the table above) until you can say them without notes.
- Take a 30-question test and mark it the Alberta way: 25 to pass, and note where your sixth wrong answer would have come.
- Book the real test when you score 27 or more on two tests in a row. That target is our suggestion, not a government rule: it leaves room for two mistakes on the day.
Ready for full 30-question tests?
The Canada Air Brake Practice Test has three 30-question practice tests in the Alberta Q format and eight topic sets, one for each part of the air brake system. Alberta and Ontario figures are each named, every explanation names the official handbook, manual or government page it rests on, and your result shows your score by topic and your time per question. One payment unlocks all 11 tests, with no subscription.
See the Canada Air Brake Practice Test. Independent practice; not made or endorsed by any provincial government, DriveTest or registry agent.
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.
Frequently asked questions
Is this air brake practice test free?
The 5 sample questions on this page are free, with no payment. They play in the same player as the full tests and show each answer with its source. The three 30-question tests and the eight topic sets are in the paid Canada Air Brake Practice Test.
How many questions are on the air brake test?
In Alberta, the knowledge test has 30 multiple-choice questions and you need 25 correct. It ends automatically at the sixth wrong answer, and there is no time limit. The Ontario pages we read do not give the number of questions on Ontario’s Z knowledge test.
How many questions can you get wrong on the air brake test in Alberta?
Five. You need 25 of 30 correct, and the test ends automatically if you answer 6 questions incorrectly.
Are these the real test questions?
No. Our questions are original and written from Alberta’s air brake manual and Ontario’s Official Air Brake Handbook, and each explanation names the source it rests on.
Do I need a different practice test for Ontario and Alberta?
The way air brakes work is the same, but some test figures are not, for example the allowed air loss and the build-up test. Learn the figures in your own province’s manual. Our questions name the province each figure comes from.
Is there a time limit on the air brake knowledge test?
Not in Alberta: there is no time limit and no limit on the number of attempts, but a retest must be on a different day and each attempt is charged. Our practice tests show a 30-minute clock only as a guide to pace.
Does the Z endorsement need a test when I renew my Ontario licence?
Not the air brake knowledge test. Since 1 September 2023, you complete an air brake learning module (online, or in person at DriveTest if you cannot do it online) and bring the certificate to a DriveTest centre or your Driver Certification Program organization. Commercial-class drivers also take the vision and commercial class knowledge tests in person, and from age 80 the module and a practical test are needed every year.
What should I study for the air brake test?
Your province’s official air brake manual or handbook: how brakes work, the air supply system (compressor, governor, tanks, dryer), service brakes and valves, spring parking brakes, trailer brakes and tractor protection, brake adjustment, the air brake inspection, and what to do when part of the system fails.
More in this series
Sources
- official — Government of Alberta: Air Brake Program (course, practical assessment, knowledge test; read 6 Nov 2026)
- official — Government of Alberta: Driver’s knowledge test (read 6 Nov 2026)
- official — Government of Ontario: Official Air Brake Handbook (read 5 Nov 2026)
- official — Government of Ontario: Get a truck driver’s licence, air brake (Z) endorsement program (read 5 Nov 2026)
- official — Government of Ontario: Get a bus driver’s licence, renew your air brake endorsement (read 5 Nov 2026)
- official — Government of Alberta: Air Brake Manual, a guide for instructors (April 2012; includes the Air Brake Practical Test form DPLS0003)
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.
