Air Brake Practice Test (Canada): Alberta Q and Ontario Z
Alberta's air brake (Q) knowledge test is 30 multiple-choice questions: you need 25 right, and the test stops at 6 wrong. Every answer here names its official source.
- Handbook source with every answer
- Alberta and Ontario figures
- Score beside the pass mark of 25
- Read 26 October and 5 November 2026
Our tests let you finish all 30 questions, so you see every answer even past 6 wrong.
- 3 practice tests of 30 questions
- A practice set for each part of the air brake system
- Alberta and Ontario test figures, each named
- Every explanation names its official source: a handbook, manual or provincial government page
- Your score by topic and your time per question
Double-checked questions Real exam pattern Free sample · 4 questions
Try before you buy free, no payment
Full practice tests 11 tests · 3 practice tests of 30 questions · 8 topic sets
One payment unlocks all 11 tests
- 3 practice tests of 30 questions
- A practice set for each part of the air brake system
- Alberta and Ontario test figures, each named
- Every explanation names its official source: a handbook, manual or provincial government page
- Your score by topic and your time per question
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Canada Air Brake Practice Test · Practice test 1 (30 questions, Alberta Q format)
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Practice test 2 (30 questions, Alberta Q format)
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Practice test 3 (30 questions, Alberta Q format)
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Brake basics and foundation brakes
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Air supply: compressor, governor, tanks, dryer
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Service brakes, chambers and valves
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Spring parking and emergency brakes
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Trailer brakes and tractor protection
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Brake adjustment and slack adjusters
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Pre-trip inspection and air brake tests
Instant score, answer review and weak-topic diagnosis
Canada Air Brake Practice Test · Driving, ABS and air system failures
Instant score, answer review and weak-topic diagnosis
What is inside
- 3 practice tests of 30 questions, the length of Alberta's air brake knowledge test, mixing every part of the air brake system.
- 8 topic sets, for the topic your test result says to review.
- Both provinces' test figures. Ontario and Alberta use different numbers for the pre-trip tests, such as the air leak test and the pressure build-up test. Each of those questions says which province it is about.
| Topic | What the questions practise | Questions |
|---|---|---|
| Brake basics and foundation brakes | Heat and brake fade, brake lag, S-cam, disc and wedge brakes, linings and drums. | 17 |
| Air supply system | Compressor, governor cut-in and cut-out, supply and service tanks, draining, air dryer, safety valve, gauges and the low air warning. | 24 |
| Service brakes, chambers and valves | The brake pedal valve, dual circuits, brake chambers and pushrod stroke, chamber sizes, relay valves. | 17 |
| Spring parking and emergency brakes | How spring brakes apply and release, caging, the yellow control knob, DD3 chambers, the park circuit. | 18 |
| Trailer brakes and tractor protection | Glad hands, supply and service lines, the red trailer supply knob, the tractor protection valve, spring brake priority, hand valves. | 22 |
| Brake adjustment and slack adjusters | Daily checks, measuring applied pushrod stroke, Ontario's adjustment limits chart, long-stroke chambers, manual and automatic slack adjusters. | 23 |
| Pre-trip inspection and air brake tests | Low air warning, build-up, governor, air loss and tractor protection tests, with Ontario's and Alberta's own figures, and the component checks. | 32 |
| Driving, ABS and air system failures | Weight, speed and stopping distance, retarders, ABS, supply, service, park and trailer failures, defects and penalties. | 22 |
| Endorsement rules: Alberta Q and Ontario Z | How each province issues the endorsement, the Alberta test rules, Ontario renewal. In the practice tests only (no separate set). | 3 |
| Total | 11 practice tests and the free sample of 4 | 178 |
Each question has one correct answer. Each explanation names the source it rests on: an Ontario handbook chapter, an Alberta air brake manual page, or an alberta.ca or ontario.ca page.
How you are scored
- On the 30-question practice tests, your score out of 30, shown beside Alberta's pass mark of 25 correct; topic sets and the free sample score out of their own totals. Our tests let you finish all 30 questions, so you see every answer even past 6 wrong, where Alberta's test would stop.
- Your score by topic, so the result names what to review before the test.
- Your time per question, against a 30-minute practice clock. Alberta says its air brake knowledge test has no time limit.
- The reason behind every answer, with its official source: a handbook, manual or provincial government page.
A score here is your score on our questions. It is not a knowledge test result and does not predict one.
Getting your Alberta Class 1 too? The Class 1 and air brake practice tests come as one bundle: Alberta requires the air brake endorsement before a Class 1 licence.
The tests, as Alberta and Ontario describe them
- Alberta (Q endorsement): on the standard route, first an approved air brake course: at least 6.5 hours in the classroom, then practical training and a practical assessment. Then the knowledge test at a registry agent: 30 multiple-choice questions, 25 correct to pass, ending at 6 wrong, with no time limit. It is in English only, and a retest must be on a different day. Some eligible mechanics and technicians may take the tests without the training. Drivers with a Class 1, 2, 3, 4 or 5 licence need the Q endorsement to drive a vehicle with air brakes; drivers of a single-motor farm vehicle are exempt.
- Ontario (Z endorsement): take an air brake endorsement course and bring its referral envelope to a DriveTest centre within 6 months (holders of a B, C, D, E, F or G licence take the course with a vehicle fleet owner), or take the tests at a DriveTest centre: a knowledge test, then a practical test. In the practical test you must show how you measure applied pushrod stroke. Ontario's Official Air Brake Handbook is the study guide.
Sources: Government of Alberta, Air Brake Program, Air brake manual: a guide for instructors and the trip air brake inspection in the Commercial Driver's Guide; Government of Ontario, Get a truck driver's licence and the Official Air Brake Handbook. Read on 26 October and 5 November 2026. Check fees and steps with your licensing office before you book.
Before you buy
I live in British Columbia, Saskatchewan or Manitoba. Is this for me?
Our questions use Alberta and Ontario materials. Most are about how an air brake system works and how to inspect it; where a question uses a province's own test figure, it names Alberta or Ontario. We have no province-specific set for British Columbia, Saskatchewan or Manitoba yet: check your province's requirements and manual.
Does the practice test stop at 6 wrong, like Alberta's?
No. You finish all 30 questions so you can see every answer. Your result shows your score beside Alberta's pass mark of 25.
Will this make me pass?
We do not claim that it will. It gives you timed practice across every part of the air brake system, your score by topic on our questions and the reason behind every answer, so you can see what to review.
How do I pay and get access?
One payment by card (or PayPal where offered), handled by our payment provider; the price shows at checkout and on your free sample result. In Canada it is charged in Canadian dollars; in the United States, the United Kingdom and the euro area in your own currency; elsewhere in your own currency where we support it, otherwise in Indian rupees with the local figure shown as an estimate. Access opens on this device straight after payment. Sign in afterwards to keep it on your account. Purchase policy.
Independent practice material by ProSyllabus. Not the official knowledge test, and not made or endorsed by any provincial government. These are our own questions. Facts about the tests come from the provinces' own pages and handbooks, read on 26 October and 5 November 2026.
Disclaimer
Independent practice, not the official test
The knowledge tests are taken at Alberta registry agents and Ontario DriveTest centres. This practice is not made or endorsed by the Government of Alberta, the Ontario Ministry of Transportation or any other licensing office. Every question here is our own, written from Ontario's Official Air Brake Handbook and Alberta's air brake manual; none comes from a real test.
Are these the real knowledge test questions? No. Every question is our own, written from Ontario's Official Air Brake Handbook and Alberta's air brake manual. None comes from a real test.
Is this made or recommended by a government? No. It is independent practice by ProSyllabus. It does not replace the approved air brake course on Alberta's standard route, or any course or test your province requires.