In Nova Scotia, Canada, air brakes testing is a crucial component of road safety. Air brakes are used in large commercial vehicles, and they work by compressing and releasing air to move the brake shoes against the drum brakes or discs.


Air Brake Test 01

1 / 30

What component of an air brake system prevents air from moving backwards in the system toward the compressor?

2 / 30

The time it takes from the moment a hazard is recognized to the time the brake is applied is known as:

3 / 30

A spring parking brake system can also act as ____________.

4 / 30

Braking at highway speed causes brake drum _______ due to heat, which in turn requires _____ push rod travel to maintain the same braking force.

5 / 30

In a spring parking brake system, the brakes are applied by _____ pressure and retracted by ______ pressure.

6 / 30

What type of brake assembly uses a 'power screw'?

7 / 30

A manual front brake limiting valve is useful in what type of conditions?

8 / 30

To stop a vehicle in 1/10 the time it took to accelerate would require a stopping force of __ times the acceleration force.

9 / 30

What is the cause of accumulated sludge at the bottom of a reservoir?

10 / 30

The foot valve is usually located closer to the ________. The longer the distance from the foot valve to the rear chambers, the ______ time it will take before the rear brakes apply.

11 / 30

If an air brake system's compressor is struggling to build 90 psi of air pressure within 3 minutes, which of the following is most likely the problem?

12 / 30

A reservoir's safety valve is normally set at ______.

13 / 30

A foot valve ______________.

14 / 30

When the driver releases the foot valve treadle and the air in the brake chambers is allowed to exhaust through the ______, releasing the brakes.

15 / 30

Which of the following controls the minimum and maximum air pressure in the air brake system by controlling when the compressor pumps air?

16 / 30

Which of the following can result in a brake system's automatic slack adjuster not maintaining proper slack?

17 / 30

Which of the following uses air pressure to assist brake force but does not require an air brake endorsement on your licence in order to operate?

18 / 30

If compressed air of 120 psi acts on a diaphragm of 45 square inches, how much force is produce?

19 / 30

The distance the ______ of the foot valve is depressed by the driver determines the air pressure that will be applied in order to operate the brakes.

20 / 30

Most brake linings work best around:

21 / 30

The first reservoir after the compressor is known as the __________.

22 / 30

All compressor reservoirs must be drained ______, in order to avoid excess water collection.

23 / 30

Which of the following is a circular container divided in the middle by a flexible diaphragm?

24 / 30

What part can be installed on long wheel base vehicles to allow the brakes to release quickly and fully by discharging the application air near the brake chambers?

25 / 30

The compressor must be able to build reservoir air pressure from _______ within three minutes, otherwise the compressor requires servicing.

26 / 30

The force that resists movement between two surfaces in contact with each other:

27 / 30

The braking force required to stop a vehicle varies directly with its _______________.

28 / 30

When a manual front brake limiting valve is activated, when applying air pressure to the front brakes it is reduced to __ percent of the application air pressure being delivered to the rear brake chambers.

29 / 30

Levers and air pressure give brakes:

30 / 30

Brake chambers and slack adjusters ______________________.

Your score is


These braking systems are designed to stop heavy vehicles efficiently, but they require regular maintenance and testing to ensure their proper functioning. As per the Nova Scotia Air Brake Program, commercial drivers must demonstrate competency in air brake systems to obtain their license. They must pass written and practical tests covering different aspects of the system, including driving, braking, and maintenance procedures. Regular inspections and testing of air brakes are mandatory to ensure the safe operation of commercial vehicles on the roads of Nova Scotia. Therefore, anyone wanting to operate commercial vehicles in Nova Scotia must know about air brake systems. The authorities regularly monitor the condition and competency of these systems to ensure safe road transport for all.

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.