If you're approaching a railway crossing at which a signal device or flagperson is warning of an approaching train, you must

stop at least 5 metres (15 feet) from the nearest rail.

Ontario Commercial & Air Brake Knowledge Test Practice 2026

Name: Ontario Commercial knowledge tests (Class A–F, Z air brake) — test facts and practice question bank
Creator: License Test
License: https://license-test.com/sources/

Ontario commercial knowledge test practice: 242 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Updated 2026-10-18

Official test facts (verified)

Fact	Value	Source	Checked
Test languages	(20 languages (per MTO))	drivetest.ca	2026-10-17
Practice questions	242 questions	drivetest.ca	2026-10-18

Only facts we confirmed on an official page are listed. Fees, minimum age and waiting periods are added once verified.

Readiness

242 practice questions

Start 10-question practice

Units

1
Vehicle Equipment & Safe Operation120 questions
0%Practise
2
General Driving Knowledge63 questions
0%Practise
3
Sharing the Road18 questions
0%Practise
4
Speed Limits & Following Distance11 questions
0%Practise
5
Traffic Signs & Signals9 questions
0%Practise
6
Bad Weather & Night Driving6 questions
0%Practise
7
Highway & Freeway Driving5 questions
0%Practise
8
Right of Way & Intersections4 questions
0%Practise
9
Impaired Driving & Penalties3 questions
0%Practise
10
Parking & Stopping Rules3 questions
0%Practise

We show test facts only after confirming them on an official page. The format for this test is still being checked; see the agency page below.

242practice questions

Practice question bank

242questions

10topics

9in Traffic Signs & Signals

Vehicle Equipment & Safe Operation is the largest topic (50% of the bank) · Questions per topic · Source: License Test question bank

Sample questions

Why are there two service tanks in a modern air brake system?
- For efficiency
- For fuel economy
- For safety ✓
- For greater stopping power
Vehicle Equipment & Safe Operation · Answer: C · Official handbook: Official MTO Air Brake Handbook, Air Supply Subsystem – Dual-service (primary and secondary) tanks
What is the maximum allowable length for a combination vehicle?
- 20 meters (66 feet)
- 23 meters (75 feet) ✓
- 25 meters (82 feet)
- 30 meters (98 feet)
General Driving Knowledge · Answer: B · Official handbook: Official MTO Truck Handbook, A and D licence classes and requirements – Size and weight limits for commercial motor vehicles
If you're approaching a railway crossing at which a signal device or flagperson is warning of an approaching train, you must
- slow down and proceed with caution.
- cross the tracks as quickly as possible.
- stop at least 1.5 metres (5 feet) from the nearest rail.
- stop at least 5 metres (15 feet) from the nearest rail. ✓
Sharing the Road · Answer: D · Official handbook: Official MTO Truck Handbook, Stopping at railway crossings
The minimum following distance for a taxi or ride-hailing (e.g., Uber) vehicle is
- 2 seconds. ✓
- 5 seconds.
- 4 seconds.
- 3 seconds.
Speed Limits & Following Distance · Answer: A · Official handbook: drivetest.ca

Commercial tests: compare with nearby provinces

Province	Questions on test	Pass mark	Practice questions
Ontario	not verified yet	not verified yet	242
Manitoba	not verified yet	not verified yet	—
Quebec	not verified yet	not verified yet	—

FAQ

How many practice questions does this Ontario commercial knowledge test practice have?

242 published questions in 10 topics. The largest topics are Vehicle Equipment & Safe Operation (120), General Driving Knowledge (63), Sharing the Road (18).

Where do these practice questions come from?

Questions are based on the official Ontario driver handbook (drivetest.ca). Every question is aligned with the official handbook rules for Ontario.

Is the Ontario commercial knowledge test practice free?

Yes. All 242 questions, topic practice and the wrong-question book are free and need no account.

Which languages is the Ontario Commercial knowledge tests (Class A–F, Z air brake) offered in?

(20 languages (per MTO))

Source

Last checked: 2026-10-17 · Verified from official source

Updated: 2026-10-18 · Based on the official driver handbook