Air brakes are an essential component of any commercial vehicle operating in Manitoba, Canada. The province requires that all drivers of commercial vehicles equipped with air brakes must possess an air brake endorsement on their driver’s license.


Air Brake Test - Quiz 1

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

Question 1 of 30

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

Question 2 of 30

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

Question 3 of 30

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

Question 4 of 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.

Question 5 of 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?

Question 6 of 30

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

Question 7 of 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.

Question 8 of 30

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

Question 9 of 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?

Question 10 of 30

Most brake linings work best around:

Question 11 of 30

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

Question 12 of 30

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

Question 13 of 30

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

Question 14 of 30

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

Question 15 of 30

Levers and air pressure give brakes:

Question 16 of 30

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

Question 17 of 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?

Question 18 of 30

A spring parking brake system can also act as ____________.

Question 19 of 30

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

Question 20 of 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.

Question 21 of 30

Brake chambers and slack adjusters ______________________.

Question 22 of 30

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

Question 23 of 30

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

Question 24 of 30

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

Question 25 of 30

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

Question 26 of 30

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

Question 27 of 30

A foot valve ______________.

Question 28 of 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.

Question 29 of 30

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

Question 30 of 30



This endorsement is issued only after the completion of a specialized air brake course accredited by the province. The course covers in detail the mechanics of the braking system, emergency situations, and proper maintenance of the air brake system. Furthermore, Manitoba regulates the frequency of air brake inspections, which must be completed regularly to ensure the system remains in good working order. These regulations help ensure the safety of both the driver and the public while on the road. Manitoba’s strict approach towards air brake regulations has made it a leader in safe commercial driving practices across Canada. has prepared this Air Brake practice test to assist drivers in understanding an air brake system’s essential operation and function. Requirements for Air Brake Endorsement are:

1) Must complete an Air Brake Written Test

2) Must complete an Air Brake Practical Test.

This endorsement permits the holder to drive vehicles equipped with air brakes in the vehicle class for which the driver is licensed.

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