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 - Quiz 3

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.

Question 1 of 30

What does the acronym psi stand for?

Question 2 of 30

What protects the wet reservoir from becoming over pressurized?

Question 3 of 30

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

Question 4 of 30

One gram is equal to how many ounces?

Question 5 of 30

One kilogram is equal to how many pounds?

Question 6 of 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 ________.

Question 7 of 30

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

Question 8 of 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?

Question 9 of 30

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

Question 10 of 30

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

Question 11 of 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?

Question 12 of 30

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

Question 13 of 30

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

Question 14 of 30

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

Question 15 of 30

Can the trailer brake hand valve be used for parking?

Question 16 of 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.

Question 17 of 30

One metre is equal to how many yards?

Question 18 of 30

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

Question 19 of 30

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

Question 20 of 30

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

Question 21 of 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?

Question 22 of 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.

Question 23 of 30

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

Question 24 of 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.

Question 25 of 30

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

Question 26 of 30

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

Question 27 of 30

How often do automatic slack adjusters need to?

Question 28 of 30

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

Question 29 of 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 __________________.

Question 30 of 30



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.