Z air brake endorsement practice test
Practice for the Air Brake Knowledge Test set by Ministry of Transportation of Ontario, tested at DriveTest centres.
Built from the Official Air Brake Handbook, with the handbook page behind every answer.
Ontario Air Brake Knowledge Test practice, for the Air brake (Z) endorsement
$9.99one payment, the full test
First 20 questions free, no account. Start now
How can the size of a brake chamber be found?
- questions
- 220
- chapters
- 12
- free
- 20
Try it
Exam mode: 20-question papers at the practice length; Ontario does not publish the real test's length.
What you get
Free
No account
- The first 20 questions
- The handbook page behind every answer
Full test
$9.99 one payment
- All 220 questions, five modes
- Practice papers, 20 questions
- Your score by chapter
Ontario Air Brake Knowledge Test practice, for the Air brake (Z) endorsement
Every Ontario test, one payment: $14.99
Class G1 Knowledge Test, Class M1 Knowledge Test, Air Brake Knowledge Test, Class A and D Knowledge Test, Class B, C, E and F Knowledge Test
Ontario Air Brake Knowledge Test practice, for the Air brake (Z) endorsement. Real test length not published. Practice length: 20 questions. Handbook published by MTO and DriveTest.
220 questions · 12 chapters · Built from the official handbook · Sources checked October 2026.
Chapters
What the handbook covers
The questions follow the chapters of The Official Air Brake Handbook, published by MTO and DriveTest.
Handbook edition: Updated: February 24, 2026.
Free questions
Try the free questions
The first 20 questions, free, no account. Each answer shows the handbook page it comes from.
How can the size of a brake chamber be found?
The handbook page appears after you answer
About the test
About the real test
- Fee
- $16.00 per knowledge test
- Where you take it
- At a DriveTest centre after an approved air brake course
- Time allowed
- Not published
- Languages
- Not published
- What to bring
- Not published
- Minimum age
- Not published
- Parent or guardian consent
- Not published
- Vision test
- Not published
- If you do not pass
- Not published
- Booking
- Not published
- Practice from the body
- Not published
Before you book
Where you take it: At a DriveTest centre after an approved air brake course.
Questions
Common Questions
Is this the Ontario Air Brake Knowledge Test?
See the notice at the end of this page.
How is the real test laid out?
What is published is shown above, under the test name. The exam mode here runs at the practice length shown above.
Where do the questions come from?
From the The Official Air Brake Handbook, published by MTO and DriveTest. Every question links to the page it was written from. Each question shows the date we last checked its source.
What do I get if I buy?
The Ontario Air Brake Knowledge Test practice, for the Air brake (Z) endorsement: the whole question bank in five modes, and full exam papers at the practice length, for $9.99, one payment.
What if I fail the real test?
See the notice at the end of this page.
Do I need an account?
Not for the first 20 questions. After you buy, you sign in with your email address and there is no password. We keep your email address, your province and which questions you got right or wrong, so you can pick up where you left off. Nothing else. You can delete it any time.
Guidepost Testing is practice material written from the official handbook. It is not the government's test and contains no questions from it.
Not affiliated with, endorsed by, or connected to MTO and DriveTest or any government.
Passing here does not mean you will pass the real test. If you fail your official test within 30 days of buying, send us your test receipt and we refund the purchase.
Each question shows the date we last checked its source.
Quebec is not covered.
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