In Nova Scotia, Canada, air brakes are an essential feature of commercial vehicles, especially those carrying heavy loads.


Air Brake Test 04

1 / 30

A vehicle carrying a load of 20,000 kg at 20 km/h is brought to a stop in 45 metres with normal application of the brakes. If this same vehicle carried 40,000 kg at 40 km/h, it would require ____ times the braking force to stop the vehicle in 45 metres.

2 / 30

On spring brake systems, during full brake application, compounding of the force applied on the slack adjusters and linkage can be said to be a combination of two forces: the force applied by the _________ and the _________.

3 / 30

The ________ of the drum brakes determines the amount of _____ they are able to absorb and dissipate into the atmosphere.

4 / 30

What absorbs the heat produced by friction?

5 / 30

Which of the following is NOT a component of a spring parking brake system?

6 / 30

The _______ adjusts the free play in the linkage between the push rod and the brake shoes.

7 / 30

What does a kPa stand for?

8 / 30

The amount of force available at the push rod is consistent out to ____ inches of stroke.

9 / 30

What is the function of a 'spitter' valve on a reservoir?

10 / 30

What methods can the driver use to stay aware of the condition of the vehicle's braking system?

11 / 30

What is the best way to avoid major breakdowns?

12 / 30

Which of the following is considered the 'brain' of an anti-lock braking system?

13 / 30

Friction produces what?

14 / 30

A brake chamber is a circular container divided in the middle by a flexible ________.

15 / 30

Which of the following is NOT a component of an air brake system?

16 / 30

What are the two most common slack adjuster problems?

17 / 30

The ________ the air supply is kept, the ______ chance of brake problems.

18 / 30

Ultimately, it is the _______ responsibility to ensure that brakes are adjusted correctly.

19 / 30

Normally on an S-cam brake with automatic slack adjustment, ________ brake applications of ________ psi per day will keep the brakes properly adjusted.

20 / 30

On a combination vehicle, what is the first step in a tractor protection valve check?

21 / 30

The electronic engine control is activated automatically by the ATC if all the wheels begin to slip. What effect does this have?

22 / 30

A relay valve has two uses. Which of the following is one of them?

23 / 30

For a vehicle to move along the highway, an internal combustion engine must convert its _____ energy into ______ energy.

24 / 30

What will a tractor protection valve with a broken return spring cause?

25 / 30

Air that is squeezed into a much smaller space than it normally would occupy is said to be ________.

26 / 30

What is a reason a medium sized vehicle would use air over hydraulic brakes?

27 / 30

Which of the following is NOT true about automatic traction control?

28 / 30

Braking distance is defined as:

29 / 30

On spring operated parking brakes, during normal operation, air pressure _________ the spring, holding it ready for parking or emergency braking.

30 / 30

At a truck stop before a downgrade, what needs to be checked before continuing to drive?

Your score is


Air brakes are governed by the Nova Scotia Motor Vehicle Act and Regulations, which stipulate that every commercial vehicle equipped with air brakes must have an air brake endorsement on the driver’s license. Additionally, every driver operating a commercial vehicle with air brakes must undergo an air brake knowledge and practical test to acquire the endorsement. The air brake test evaluates a driver’s knowledge of air brake components, operation, maintenance, and safety precautions. Commercial vehicle owners and operators in Nova Scotia must also ensure that their air brake systems are adequately maintained and inspected regularly to prevent accidents caused by faulty brakes. The province has stringent regulations for air brake systems, and failure to comply can result in hefty fines or the revocation of operating licenses. With these regulations in place, Nova Scotians can trust that commercial vehicles on their roads have well-maintained and properly functioning air brake systems.

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.