Air brake systems are critical components of commercial vehicles in New Brunswick, Canada. In this region, all commercial vehicles with a gross vehicle weight rating above 4,500 kg must have functional air brakes.


Air Brake Test 03

1 / 30

For a combination unit, during what part of the pre-trip check do you ensure that the reservoir air pressure builds from 50 to 90 psi within three minutes?

2 / 30

If a brake is out of adjustment and there is not enough reserve stroke of the push rod travel to compensate for drum expansion, this will cause ________.

3 / 30

At the first stop after adjusting the wedge type brakes, check each brake drum or rotor for temperature. An extra _______ brake drum indicates that you have _____ adjusted it.

4 / 30

Choose the correct order of steps to secure a vehicle as part of a single unit pre-trip air brake inspection.

5 / 30

After a long mountain drive, what is the best way to park if your vehicle has spring parking brakes?

6 / 30

One metre is equal to how many yards?

7 / 30

One kilogram is equal to how many pounds?

8 / 30

During the '_______' stage, the compressor is able to cool.

9 / 30

Choose the correct order of steps for the compressor and warning devices check as part of a single unit pre-trip air brake inspection.

10 / 30

For a combination unit, during what part of the pre-trip check do you ensure that the air brake glad hands and trailer electrical cord is connected properly?

11 / 30

When checking for reservoir air leakage for a single unit, after making a full brake application with the foot valve and holding it the air pressure gauge reading should not drop more than __ psi per minute.

12 / 30

Which of the following vehicles would require checking the hydraulic fluid level in the reservoir as part of the pre-trip check?

13 / 30

What would be the psi if 50 pounds were being forced onto 2 square inches?

14 / 30

Can the trailer brake hand valve be used for parking?

15 / 30

How often do automatic slack adjusters need to?

16 / 30

If an air-actuated hydraulic brake system was to lose its air supply, the vehicle would have no service brakes. Only the __________ would be operating.

17 / 30

An air dryer may be installed between the ________ and the ________ to help remove moisture from the compressed air.

18 / 30

Which of the following does not usually have a pressure gauge?

19 / 30

Discounting self-lubricated compressors, how are compressors usually lubricated?

20 / 30

On a combination unit, the governor should place the compressor in the unloading stage between ___ psi minimum and ___ psi maximum.

21 / 30

What is the upward motion of the piston that compresses the air in the cylinder known as?

22 / 30

In an air-boost hydraulic brake system what is used to intensify the hydraulic pressure generated by the master cylinder?

23 / 30

What does the acronym psi stand for?

24 / 30

When conducting a compressor and warning device check for a single unit, warning device(s) must operate to __ psi or higher.

25 / 30

What should be done to parked trailers without spring parking brakes to prevent a possible runaway?

26 / 30

What protects the wet reservoir from becoming over pressurized?

27 / 30

In a dual air brake system, if one circuit develops a leak, the other circuit would be protected from air pressure loss by the __________________.

28 / 30

When inspecting brake adjustment on a single unit, the slack (push rod travel) should be within how many inches within manufacturer's specifications?

29 / 30

One gram is equal to how many ounces?

30 / 30

What is used to mark where the push rod enters the brake chamber when determining whether an S-cam brake with manual slack adjusters requires adjustment?

Your score is


The New Brunswick Air Brake Test is mandatory for all drivers of commercial vehicles with air brakes, regardless of prior experience. This test ensures that drivers have the knowledge and skills to perform daily air brake inspections, identify system problems, and perform emergency braking maneuvers safely. The importance of air brake safety in New Brunswick is further emphasized by legislation that enforces strict regulations regarding the maintenance of air brake systems. Commercial vehicle operators must perform regular inspections and maintenance on their air brake systems, including an annual in-depth inspection by a certified mechanic. Failure to comply with these regulations can result in hefty fines and even loss of operating privileges. With such strict measures in place, New Brunswick maintains a meager rate of accidents related to malfunctioning air brakes, ensuring the safety of all road users.

Before learning to drive a Class 1, Class 2, Class 3, or Class 4 vehicle, you must get authorized instruction in the class of vehicle you want to be licensed in. For each section of these practice tests, we have multiple practice tests. Requirements for Air Brake Endorsement are 1) Must complete an Air Brake Written Test 2) Must complete an Air Brake Practical Test.

To successfully prepare, consider utilizing these exams and the official New Brunswick Air Brake Manual to your advantage. The more knowledge you can attain, the better it will be for you once you return to the SNB office to take the air brake license written knowledge test.