Air brake systems are an essential safety feature on large vehicles in Nova Scotia, Canada. The province’s air brake regulations require all drivers of commercial vehicles equipped with air brakes to pass a written knowledge test and a practical air brake test.


Air Brake Test - Quiz 3

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

Question 1 of 30

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

Question 2 of 30

What protects the wet reservoir from becoming over pressurized?

Question 3 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 4 of 30

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

Question 5 of 30

One kilogram is equal to how many pounds?

Question 6 of 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.

Question 7 of 30

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

Question 8 of 30

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

Question 9 of 30

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

Question 10 of 30

What does the acronym psi stand for?

Question 11 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 12 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 13 of 30

How often do automatic slack adjusters need to?

Question 14 of 30

One gram is equal to how many ounces?

Question 15 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 16 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 17 of 30

One metre is equal to how many yards?

Question 18 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 19 of 30

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

Question 20 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 21 of 30

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

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

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

Question 24 of 30

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

Question 25 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 26 of 30

Can the trailer brake hand valve be used for parking?

Question 27 of 30

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

Question 28 of 30

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

Question 29 of 30

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

Question 30 of 30



The practical test measures the driver’s ability to perform pre-trip inspections, proper pressure tests, and operate the air brake system on the road. Additionally, drivers with air brake endorsements must take refresher courses and retest every five years to ensure their safety and that of other road users. Nova Scotia’s air brake system regulations help to ensure that vehicles on the road are correctly maintained and that drivers are adequately trained to operate these critical safety features.

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 Nova Scotia 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.