In Manitoba, Canada, air brakes are a crucial safety feature for heavy vehicles such as trucks and buses.


Air Brake Test 02

1 / 30

What system reduces the potential of powering into a jackknife caused by wheel overspin during acceleration?

2 / 30

If the air pressure drops to a range between ______ psi, the trailer supply valve will close automatically by spring pressure, opening the exhaust port.

3 / 30

Which of the following is responsible for preventing automatic spring brake application if the trailer supply line has a gradual leak?

4 / 30

Which of the following negatively affect braking ability?

5 / 30

Caging a spring parking brake is the same as...

6 / 30

A/n _______ is an electronic system that monitors wheel speed at all times and controls wheel speed while braking.

7 / 30

Which of the following negatively affects braking ability?

8 / 30

Tractors and trailers _______ ABS can be connected to one another without affecting the operation of the ABS.

9 / 30

Which of the following is a term that refers to the coupling device used to connect the control (service) and supply (emergency) lines of the trailer to the tractor?

10 / 30

What are the two types of trailer supply valves? Choose the best answer.

11 / 30

Which of the following is true of a basic dual air brake system?

12 / 30

With automatic traction control, __________ is activated when the system detects a wheel slipping because the wheels operating on different surfaces such as one wheel on dry pavement and the other on ice.

13 / 30

The effectiveness of diaphragm brake chambers drops off significantly if the stroke exceeds __% of its designed travel.

14 / 30

A tractor protection valve is normally located near the _________.

15 / 30

When connecting the glad hands, start with the two gaskets together and the couplers at a ___ angle to each other.

16 / 30

Which of the following is a disadvantage of a control (service) line and foot and hand valve system?

17 / 30

___________ must not be used to hold a parked vehicle that is left unattended. Loss of pressure will result in loss of brakes. Always set the __________.

18 / 30

___________ prevents total loss of air from the tractor if the trailer breaks away, or if the connecting air lines between tractor and trailer become separated or ruptured.

19 / 30

If a relay emergency valve is mounted on the trailer reservoir and a loss of air pressure from the power unit service system occurs, what will automatically happen?

20 / 30

On vehicles equipped with ______ brakes it is possible to pump the brake pedal to compensate for brakes that are out of adjustment. This is not possible with a vehicle equipped with ___________ brakes.

21 / 30

When a brake diaphragm chamber bottoms out, the force reduces to ____.

22 / 30

Which of the following can a tractor with a dual air brake and spring parking brakes system tow?

23 / 30

An ABS system keeps the wheel from skidding and increases vehicle stability and control during what type of conditions?

24 / 30

On the pre-trip air brake inspection, you must ensure that the parking brake spring is not _______ or it will not expand and apply the brake.

25 / 30

Which of the following is capable of directing air flow into a common line from either of the foot valve or the hand valve?

26 / 30

Which of the following is another term for a control (service) line?

27 / 30

If the foot valve is supplying a higher application pressure than the hand valve, a two-way check valve will allow air flow from which source?

28 / 30

$What would happen if a trailer that is not equipped with spring parking brakes were to separate from the tractor?

29 / 30

Which of the following is true in the case that there is air loss in one of the dual air brake system's circuits?

30 / 30

In regards to a dual air brake system, air taken from primary and secondary circuits through a two-way check valve is known as _________.

Your score is


To operate these vehicles, drivers must hold a valid air brake endorsement on their driver’s license. This endorsement requires passing a written and practical air brake test to ensure the driver understands how the system works and can properly maintain and operate the vehicle. Regular system inspections are also required to ensure that it is functioning correctly. The air brake system in Manitoba vehicles uses compressed air to activate brakes, providing a more reliable and effective method of stopping the vehicle. Implementing air brakes has significantly improved vehicle safety in Manitoba, reducing the likelihood of accidents caused by brake failure. The provincial government has also recognized the importance of air brakes, which has established strict regulations to ensure that this safety feature is properly maintained and used by drivers. 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.