AB Air Brake Test 2

A commercial truck driver’s licence is required to drive any commercial vehicle in Alberta. There are two types of driving jobs available: owner-operator and employee. If you plan on running your own business or becoming a driver-for-hire, you will need a truck driver’s licence. To receive a trucking licence, you will have to pass two exams: a commercial knowledge exam with multiple-choice questions and a road test, which will test your general driving skills. To help you study for the knowledge test, we have prepared this second practice exam with 50 questions to test your knowledge of driving large vehicles in Alberta. We encourage you to read the hints and explanations provided and check out our sources. You will notice that the questions are slightly more difficult. This is because they start to examine some of the more technical definitions and concepts found in the official 2025 AB commercial driver’s manual. Once you have studied these questions, giving another truck driver practice test a try may be a good idea. Good luck!

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AB Driver and Vehicle Services

Official Alberta driver's manual (2025)

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Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.

Written by Andrei Zakhareuski Updated over a week ago

At Tests.ca, we understand the importance of reliable and accurate practice tests to help you prepare for your driver's knowledge exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.

Here's an inside look at how we maintain the highest quality in our practice tests.

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We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation.
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Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your driver's knowledge exam.

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List of questions (classic view)

If there is a loss of pressure in the trailer supply line, you would expect the trailer brakes to be applied and
If the air pressure reaches 150 psi, the safety valve will open. Where is the safety valve located?
The low air warning device must activate by the time that tank air pressure falls to
A modern Air Dryer Integrated System (AD-IS) includes which of the following components?
Minimum governor cut-out pressure is
With an Air Dryer Integrated System (AD-IS), you would expect the air pressure build-up time to be ________ without an AD-IS.
Maximum governor cut-out pressure is
Can an air brake system include both an air dryer and an alcohol evaporator (injector)?
With the engine idling at _________, the air pressure must rise from 50 psi to 90 psi within three minutes.
Your vehicle may still be driven if
The governor cut-in pressure is normally _________ below the cut-out pressure.
With the engine idling at 1,200 rpm, the air pressure must rise _____________ within 3 minutes.
Before starting the air brake test procedures, make sure that air pressure is at least
The spring brakes will start to apply when the air pressure falls below
During a pre-hill inspection, you should check which of the following aspects of the air brake system?
The trailer air supply valve will close automatically if air pressure in the trailer supply line drops to
Which of the following statements is true?
Before testing the low air pressure warning device, make sure that air pressure is at least
The air-loss rate test can be performed only when
Air compressors can either be driven by the engine belt and pulleys or
The spring brake test is passed if the vehicle
Different sizes of brake chamber on the same axle can cause
To test the air brakes, the vehicle should be parked
In a drum brake, the brake linings are attached to
Where is the air dryer located?
When draining the air tanks, you observe excessive oil coming out of the supply tank. Which of the following is most likely to be faulty?
You can usually make a normal stop by applying no more than
The coil spring in most spring parking brake chambers can exert a force of
Spring parking brakes typically require air pressures of at least _______ to completely release.
In the air service circuit, there is a double (two-way) check valve connected to the primary and secondary service tanks. What does this valve do?
In which of the following situations should a spring parking brake chamber be caged?
Wedge brakes are designed to be
Where are the air brake chambers located?
What does an ABS system do?
When you are going at twice the speed, your service brakes will need to work _________ to stop your vehicle.
Which of these significantly decreases the braking force produced at the wheel?
Which type of trailer can be towed before the service tanks are full?
In determining how well your air brake system works, which is NOT a significant factor?
In large commercial vehicles, most air brake systems use automatic valves to
Where are a vehicle's air tanks located?
What is the most frequent reason for placing a commercial vehicle out of service?
How can you check whether the trailer spring brakes have activated?
Which of these vehicles is most likely to be equipped with air brakes?
Where is the air pressure gauge for the service tanks?
Which colour is the trailer supply line?
What can cause the air pressure in the air brake system to drop?
How do you apply the parking brakes?
Your vehicle's air compressor is belt driven. How do you check for correct belt tension?
Which of these is not a part of a drum brake?
When brakes become overheated, they also become