Free Ontario Commercial Driver Licence Practice Test Part 1

Preparing for your Ontario Commercial Driver Licence Practice Test? Whether you’re aiming to drive a truck or other commercial vehicle, our free, up-to-date Ontario Truck Driver Licence Practice Test are designed to help you pass with confidence. Based on the official MTO Commercial Driver’s Handbook, these tests cover everything you need to know to safely and legally operate a commercial vehicle in Ontario.

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Commercial Truck License Test Part 1

1 / 30

What should a driver do if the low air pressure warning fails to activate below 60 PSI?

2 / 30

Who is legally responsible for knowing and following the safety policies of the carrier?

3 / 30

What is one of the main purposes of the circle check before a trip?

4 / 30

What is the minimum tire tread depth allowed on a steering axle?

5 / 30

Which of the following must be completed before transporting dangerous goods?

6 / 30

What is the stopping sequence for a driver when encountering a hazard?

7 / 30

What action should you take if a major defect is discovered during a pre-trip inspection?

8 / 30

When is a driver legally required to carry a trip inspection report?

9 / 30

What is required when a load extends more than 1.5 metres beyond the rear of the vehicle during daytime?

10 / 30

How often must a truck or trailer over 11,794 kg be inspected under the Vehicle Inspection Program?

11 / 30

How often must a school bus be inspected under the Vehicle Inspection Program?

12 / 30

If an air compressor takes more than 3 minutes to build pressure from 50 to 90 PSI, what does this indicate?

13 / 30

What is one sign of a problem with the vehicle’s air brake system?

14 / 30

What is the maximum speed limit for a long combination vehicle unless otherwise posted?

15 / 30

What does the abbreviation GVW stand for in commercial vehicle regulations?

16 / 30

When are drivers required to complete a post-trip inspection?

17 / 30

What are the two main categories of vehicle defects?

18 / 30

What is the primary purpose of the National Safety Code (NSC)?

19 / 30

What is the legal minimum age to apply for a Class 1 commercial licence?

20 / 30

When is a commercial driver exempt from completing a daily log?

21 / 30

What is a "circle check"?

22 / 30

What does the "Q" endorsement on a driver’s licence indicate?

23 / 30

Which of the following must be included in the safety equipment for a commercial vehicle?

24 / 30

What is the required equipment for an overhanging load during nighttime?

25 / 30

What does “off-tracking” refer to in commercial driving?

26 / 30

What is the first step in a trip air brake inspection?

27 / 30

Why is it important to report vehicle defects to the carrier immediately?

28 / 30

Which type of vehicle inspection helps ensure problems are identified before the vehicle is operated on the road?

29 / 30

What is the minimum brake chamber pressure required before testing air brakes?

30 / 30

What is the minimum following distance recommended for large commercial vehicles under normal conditions?

Your score is

The average score is 8%

0%

What to Expect on the Official Ontario Commercial Driver’s Licence Test

Note: The number of questions may vary depending on your licence class (A, D, B, C, etc.).

Road Signs & Traffic Signals

40 

Rules of the Road & Regulations

32 

Vehicle Inspections & Safety Procedures

80%

Air Brake Knowledge

30 min

Passing Score

80%

FAQs About the Ontario Commercial Driver’s Licence Test

Ontario offers several classes: Class A (tractor-trailer), Class D (straight truck), Class B (school bus), Class C (transit bus), Class E & F (smaller buses), and Z (air brake endorsement).

You must meet eligibility requirements, pass a medical exam, write a knowledge test, and complete any mandatory training (like MELT for Class A). After that, you book and pass a road test.

MELT (Mandatory Entry-Level Training) is required for all new Class A licence applicants. It includes a standardized curriculum covering in-class, in-yard, and on-road instruction.

The test includes road signs, traffic laws, vehicle inspections, safe driving practices, and air brake systems (if applicable).

There are typically 30 to 50 multiple-choice questions, depending on the licence class.

You must score at least 80% to pass. That usually means getting 24 to 40 questions correct, depending on the test length.

❌ No. You must take the test in person at a DriveTest Centre.

✅ Yes. A valid medical report is required for Classes A, B, C, D, E, and F before testing or renewing your licence.

A commercial licence is typically valid for 5 years, subject to periodic medical checks and renewals.

If you’re driving a vehicle equipped with air brakes, you must complete an air brake training course and pass both the Z knowledge test and practical brake inspection.

Free Ontario Truck Driver Licence Practice Test

Free Ontario Commercial Test Practice – Truck, Bus & Air Brake (Class A, D, B, C, Z)

Getting your Ontario commercial driver’s licence is your gateway to a new career on the road—whether you’re hauling freight across provinces, driving a city bus, or working in a skilled trade. But before you can operate a commercial vehicle, you must pass the Ontario commercial knowledge test, and preparation is the key to your success.

Our free Ontario commercial practice tests are designed to help you pass on your first try. Every question is 100% based on the official MTO Commercial Driver’s Handbook and reflects the real test format used at DriveTest Centres. With realistic multiple-choice questions, no registration required, and unlimited access, you’ll build the knowledge and confidence to drive professionally and safely.

Whether you’re a new driver upgrading your licence or preparing for your Z (air brake) endorsement, these Ontario commercial practice tests are your go-to tool for success.

🚛 Ready to Start Your Career in Commercial Driving?
Start practicing today and take your first confident step toward earning your Ontario commercial licence. With the right preparation tools, you’ll be ready to pass the knowledge test and start your driving career with skill, safety, and confidence.

👉 Take Our Free Ontario Commercial Practice Test
📘 Download the Official Ontario Commercial Driver’s Handbook
📺 Watch Our Commercial Licence Prep Videos on YouTube: @usadmvpermitpracticetest
🌐 Visit: usadmvpermitpracticetest.com

01

Why Get a Commercial Driver's Licence in Ontario?

Ontario’s transportation industry is booming, with demand for qualified commercial drivers at an all-time high. Whether you’re planning to drive a tractor-trailer (Class A), straight truck (Class D), school bus (Class B or E), or a transit bus (Class C or F), you’ll need a valid Ontario commercial driver’s licence.

A commercial licence opens doors to: Ontario Truck Driver Licence Practice Test

  • Well-paying job opportunities

  • Long-haul or local driving careers

  • Advancement into logistics, training, or fleet management

  • Benefits and job security in a high-demand industry

02

Ontario Commercial Licence Classes

Before applying, it’s important to know which licence class suits your goals:

ClassVehicle Type
Class ATractor-trailers, combination vehicles
Class DStraight trucks (over 11,000 kg)
Class BSchool buses (over 24 passengers)
Class CTransit and intercity buses
Class ESmall school buses (under 24 passengers)
Class FAmbulances, vans, and small buses
Class ZAir brake endorsement (needed with most commercial classes)
03

About the Ontario Commercial Knowledge Test

Before you can get behind the wheel, you must pass the written knowledge test. The test is based on the Ontario Commercial Driver’s Handbook and includes questions on:Ontario Truck Driver Licence Practice Test

  • Commercial driving laws and responsibilities

  • Vehicle inspection and maintenance

  • Road signs and traffic signals

  • Safety protocols and defensive driving

  • Air brake systems (for Class Z)

Test Format:

  • Multiple-choice

  • Randomized questions

  • Minimum 80% passing score

04

Practice Before You Write – Free Ontario Commercial Licence Practice Test

Prepare confidently with our free practice test based on the official MTO Commercial Driver’s Handbook. Our questions are structured just like the real test, giving you:

  • Realistic test experience

  • Detailed explanations for every answer

  • Topics covering all major knowledge areas

  • Unlimited retakes to boost your score

👉 Start practicing now to improve your chances of passing on the first try!

05

What to Study for the Ontario Commercial Driver’s Test

Use the MTO Commercial Driver’s Handbook as your primary study material. Focus on the following chapters: Ontario Truck Driver Licence Practice Test

  • Vehicle inspections

  • Safe operating procedures

  • Professional driver responsibilities

  • Regulatory compliance and hours of service

  • Air brake system (if required)

  • Road signs and markings

Tip: Pair the handbook with our online practice tests for best results.

06

Eligibility Requirements for Ontario Commercial Licence

To apply for a commercial driver’s licence in Ontario, you must:

  • Be at least 18 years old

  • Hold a valid Ontario Class G or higher licence

  • Pass a vision test

  • Pass the written knowledge test

  • Pass a medical exam (Classes A, B, C, D, E, and F)

  • Complete entry-level training for Class A (MELT program)

  • Pass the road test for your specific licence class

07

Air Brake (Z) Endorsement

Most commercial vehicles in Ontario require a Class Z air brake endorsement. You must:

  • Complete an approved air brake training course

  • Pass a knowledge test

  • Pass a practical air brake inspection test

👉 We also offer a dedicated Air Brake Practice Test to help you ace this section.

08

Booking Your Test

To book your commercial knowledge test, visit:
DriveTest Ontario

You can schedule:

  • Written test (available on a walk-in basis at most centres)

  • Road test (booked in advance)

  • Air brake endorsement test (if applicable)

Make sure to bring:

  • Valid ID

  • Proof of training (Class A only)

  • Medical form (if required)

  • Applicable fees


Entry-Level Training for Class A (MELT)

If you’re applying for a Class A licence, you must complete the Mandatory Entry-Level Training (MELT) program before booking a road test. This course includes classroom, in-yard, and on-road instruction from an approved training provider.

Learn more on the MTO MELT Program

09

How to Pass the Ontario Commercial Licence Test – Tips & Tricks

  • Study the Handbook Thoroughly: Don’t skip diagrams, definitions, or safety checklists.

  • Use Practice Tests Often: Repetition improves memory and test-taking confidence.

  • Focus on Air Brake Rules: These are frequently misunderstood.

  • Practice Inspections: Understand pre-trip inspection steps clearly.

  • Ask Questions: Join forums or speak to other drivers to clarify confusing topics.

10

Get Started – Free Ontario Commercial Practice Test

✅ Based on the official MTO Handbook
✅ Unlimited attempts
✅ Instant feedback and answers
✅ Available for all licence classes (A, D, B, C, Z, and more)

👉 Start Your Practice Test Now

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