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Canada · Air brake test

Air brake knowledge test in Canada

You get an air brake endorsement from your own province, added to the licence you already hold. Every province covered here gives an air brake knowledge test based on its own air brake manual. Ontario, British Columbia, Saskatchewan, Manitoba and New Brunswick add a practical test on a real vehicle, and Alberta assesses that skill at the end of its required course. Each province uses its own code: Q in Alberta, Z in Ontario and code 15 in British Columbia.

  • 25 of 30Score to pass in Alberta
  • 16 of 20Score to pass in Nova Scotia
  • Online with a webcamOne way to take Nova Scotia’s test
Where to studyHow the test works

Updated October 2026 · Written from the provincial air brake manuals, led by Ontario’s Official Air Brake Handbook

Key facts

At a glance

Who gives the test
Your province’s licensing body, such as an Alberta registry agent, a DriveTest centre or the Insurance Corporation of British Columbia (ICBC)
Course first
Required in Alberta and British Columbia; one of two routes in Ontario
Who needs it
Drivers of vehicles with air brakes; each province sets its own exceptions, such as farm trucks in Saskatchewan
What to study
Your own province’s air brake manual, such as Ontario’s Official Air Brake Handbook

How it works

How the air brake knowledge test works in each province

  1. Your own province gives the endorsement, so its rules are the ones that count. Alberta, for example, needs a valid Alberta licence before you can take its test.
  2. The knowledge test is multiple choice and based on your province’s air brake manual.
  3. The practical part checks that you can inspect the air brakes on a real vehicle: the low air warning, pressure build-up, governor, air loss, spring brakes and brake adjustment.
  4. If you’re heading for a Class 1 (tractor-trailer) licence, several provinces tie air brakes into its training or road test; the licence classes page explains how.
  5. Passing adds a code to your licence card, such as Q in Alberta or Z in Ontario.

Topics

What’s on the test

01

Brakes, braking and stopping distance

How air brakes differ from the hydraulic brakes on a car, and what speed, weight and heat do to stopping.

Key points (4)
  • Hydraulic brakes are used on almost all passenger vehicles and light trucks; air brakes are used on large commercial vehicles (Ontario Official Air Brake Handbook, chapter 1).
  • Every air brake system has a split-second delay in brake application and release, ranging up to one-half second (chapter 7).
  • When speed doubles, stopping distance increases by four times; double the weight and the speed and it increases by eight times (chapter 7).
  • Anti-lock braking systems prevent wheel lock but shouldn’t be expected to shorten stopping distance (chapter 7).
02

Air supply: compressor, governor and tanks

Where the compressed air comes from, how the governor keeps it in range and why the tanks are drained.

Key points (4)
  • Cut-out pressure is normally 20 to 25 psi (pounds per square inch) above cut-in; actual cut-out must never be higher than 145 psi and cut-in never lower than 80 psi (Ontario handbook, chapter 2).
  • Drain the supply (wet) tank first, so its moisture doesn’t flow into the next tank (chapter 2).
  • Safety valves normally open at 150 psi (chapter 2).
  • The low air pressure warning must come on before pressure in either tank falls to 55 psi (chapter 2).
03

Service brakes and brake chambers

How the brake pedal sends air to the chambers, and how pushrod stroke turns air into braking force.

Key points (3)
  • Most brake designs use dual circuits, so if one circuit fails the brakes still work on the wheels connected to the other (Ontario handbook, chapter 3).
  • A service brake chamber holds a diaphragm, a pushrod and a return spring (chapter 3).
  • Each brake chamber has a limited pushrod stroke, beyond which it produces no brake force (chapter 3).
04

Spring parking and emergency brakes

How spring brakes apply when air leaves the chamber, and the controls that work them.

Key points (3)
  • Spring brakes apply when air pressure leaves the chamber and release when air builds up; about 60 psi is normally needed to release them (Ontario handbook, chapter 4).
  • The spring brake control valve normally has a yellow, four-sided knob (chapter 4).
  • A caged (disabled) spring brake chamber shows its caging bolt, and its parking and emergency brake won’t apply (chapter 4).
05

Trailer brakes

The two air lines to a trailer, the valves that protect the tractor and how trailer spring brakes apply.

Key points (4)
  • Glad hands are colour-coded in most cases: red for the supply line and blue for the service line (Ontario handbook, chapter 5).
  • The trailer supply valve closes by itself when supply line pressure drops to between 20 and 45 psi (chapter 5).
  • Trailer spring brakes must apply automatically when trailer supply line pressure drops below 60 psi (chapter 5).
  • Never use the trailer hand valve for parking or emergency stops (chapter 5).
06

Foundation brakes and brake adjustment

S-cam, disc and wedge brakes, and how to check that each one is in adjustment.

Key points (4)
  • The S-cam brake is the most common foundation brake on commercial vehicles with air brakes (Ontario handbook, chapter 6).
  • Measure applied pushrod stroke with 90 to 100 psi in the tanks, the engine off and the brakes fully applied (chapter 11).
  • A standard size 30 clamp-type chamber has a 2 inch (51 mm) adjustment limit (chapter 12).
  • If an automatic slack adjuster needs regular readjusting, it’s defective (chapter 11).
07

Inspecting the air brake system

The daily air brake check the practical tests are built on.

Key points (3)
  • Pressure should rise from 85 to 100 psi within two minutes, with the engine at 600 to 900 rpm, revolutions per minute (Ontario handbook, chapter 10).
  • With the brakes fully applied and the engine off, a straight truck may lose up to 3 psi a minute, a tractor and trailer 4 psi (chapter 10).
  • The spring brakes must hold the vehicle when you gently apply engine power in a low gear (chapter 10).
08

Air brake endorsements and the law

Who needs an endorsement, the codes each province uses, and the rules on defects.

Key points (3)
  • Ontario requires its Z endorsement for air brakes and for air-over-hydraulic brakes (Ontario, Get a truck driver’s licence).
  • Alberta uses a Q endorsement, which doesn’t need renewing (Alberta, Air Brake Program).
  • Drivers in Ontario must report air brake defects to the vehicle operator (Ontario handbook, chapter 8).

Test day

What to bring to an air brake test

  • Your current driver’s licence
  • Proof of your course, if your province requires one (Alberta’s completion forms, a B.C. course card)
  • The identification your licensing office asks for
  • For a practical test, a vehicle with air brakes and the tools your province lists, such as wheel chocks and a way to measure pushrod stroke

Before you go

  1. Check which endorsement and tests your province uses.
  2. Get your province’s air brake manual and read every chapter, including the inspection chapter.
  3. Book an approved course if your province requires one.
  4. Practise the daily air brake check on the vehicle you’ll test in, and learn its brake chamber sizes.
  5. Book the knowledge test with your licensing office, then the practical test.
Air brake manuals by provinceEach province’s manual and how to get it. Test booking is on each province’s page.

Study options

Where to study

Study from your own province’s manual. The manuals page lists each one and how to get it.

OptionPriceFree to useLinks
Official manuals
Ontario Ministry of Transportation: The Official Air Brake HandbookOntario’s air brake handbook, 12 chapters onlineEnds with the practical examination checklists, adjustment limits chart and circuit diagrams. Updated February 24, 2026.
Online version: no price shown; hard copy soldRead online at ontario.ca
ontario.ca: The Official Air Brake Handbook ↗
Insurance Corporation of British Columbia: Driving Commercial VehiclesBritish Columbia’s commercial driving guide; chapters 1, 2 and 8 to 10 for the air brake endorsementICBC’s study chart lists chapters 1, 2, 8, 9 and 10 for the single-unit air brake endorsement. Most chapters end with review questions.
No price shown for the PDFNot stated
ICBC: Driving Commercial Vehicles (PDF) ↗
Nova Scotia Registry of Motor Vehicles: Air Brake ManualNova Scotia’s air brake manualLinked from Nova Scotia’s knowledge test page. Each section ends with summary questions.
No price shown for the PDFNot stated
Nova Scotia: Air Brake Manual (PDF) ↗
Manitoba Public Insurance: Air Brake ManualManitoba’s air brake manualManitoba Public Insurance bases its air brake knowledge test on it.
No price shown for the PDFNot stated
MPI: Air Brake Manual (PDF) ↗
Saskatchewan Government Insurance: Air Brake Manual 2025-26Saskatchewan’s air brake manualSaskatchewan Government Insurance’s manual, with the A endorsement requirements in chapter 1.
No price shown for the PDFNot stated
SGI: Air Brake Manual (PDF) ↗
New Brunswick: Air Brake ManualNew Brunswick’s air brake manual (May 2023)Study questions end each section, and a fold-out diagram shows a complete dual air brake system.
No price shown for the PDFNot stated
New Brunswick: Air Brake Manual (PDF) ↗
Alberta: Air Brake Manual, A Guide for StudentsAlberta’s student manual, March 2023, 114 pagesAlberta’s knowledge test is written from it.
$10 from Alberta King’s PrinterA copy comes with the Air Brake Program course
Alberta King’s Printer: Air Brake Manual ↗
Courses and modules
Alberta: licensed driver training schoolsOfficial list of schools, with Q for the Air Brake ProgramThe list gives each school’s address and the types of instruction it’s licensed for.
Schools set their own pricesNot applicable
Alberta.ca: Licensed driver training schools ↗
Insurance Corporation of British Columbia: Find a driving schoolICBC’s page for choosing a B.C. driving schoolICBC’s page for finding a licensed school. The two kinds of B.C. air brake course are on the British Columbia page.
Schools set their own pricesNot applicable
ICBC: Choosing your driving school ↗
Ontario Ministry of Transportation: Air Brakes Refresher TrainingOnline learning module for renewing an Ontario Z endorsementRequired before renewing a licence with a Z endorsement since September 1, 2023. You need your licence to start, and you get a Certificate of Completion.
Not statedNot stated
Ontario: Air Brakes Refresher Training ↗
Skills Pass NLOnline commercial driver training for Newfoundland and LabradorNot air brake specific. Covers hours of service, cargo securement, trip inspection and the rules of the road for new and experienced commercial drivers.
No costAvailable at no cost, says the province
Newfoundland and Labrador: Commercial driver training ↗

Prices and ratings checked October 2026.

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FAQ

Common questions

How do you get an air brake endorsement?

Through the licensing body of the province that issued your licence. You study its air brake manual, take a course where it’s required (Alberta and British Columbia), pass the air brake knowledge test and, everywhere covered here except Nova Scotia, a practical test or assessment on a vehicle with air brakes. The endorsement page in this guide has each province’s steps and code.

Can you take the air brake knowledge test online?

In Nova Scotia, yes: you take it on a desktop or laptop with a webcam, in English or French. Alberta gives it at registry agents, Ontario at DriveTest centres, British Columbia at ICBC driver licensing offices, and Manitoba and New Brunswick by appointment.

How many questions are on the air brake test?

It depends on the province. Alberta’s has 30 questions and you need 25 right. Nova Scotia’s has 20 and you need 16. ICBC’s course slides for schools give 25 questions with 20 to pass in British Columbia. Ontario’s and Manitoba’s pages don’t give a question count.

Do you need an air brake endorsement for air-over-hydraulic brakes?

In Ontario and Manitoba, yes. Nova Scotia needs it for air-actuated hydraulic brakes but not air-boost hydraulic brakes. Saskatchewan doesn’t require its A endorsement for trucks with air-over-hydraulic brakes. Air parking brakes on their own don’t need it in Ontario.

Does an air brake endorsement expire?

Alberta’s Q endorsement doesn’t need renewing. In Ontario you renew the Z with your licence, after an online air brake learning module, and from age 80 you also take the practical test every year.

What changes for commercial licences in 2027?

From January 1, 2027, Ontario requires you to have held a Class G or higher licence for at least 6 months before the Class A road test. In Alberta, students who signed a Class 1 training contract by August 31, 2026 can finish under the old training schedule, and must do so by March 31, 2027. The licence classes page has the details. Neither rule changes the air brake endorsement itself.

Sources: Alberta Transportation and Economic Corridors · Alberta.ca · Ontario Ministry of Transportation and 10 more. Checked October 2026.

Rules and fees can change, so check the official site before your test.

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