our practice tests allow you to get a feel for the actual exam format, so you can go into test day feeling calm and prepared. Don’t let the Ontario Air Brake test intimidate you – use our free practice tests to help you pass with flying colors.


Ontario Air Brake Test 05

1 / 30

You can discover the size of brake chamber on your vehicle by...?

2 / 30

Readjustments to manual slack adjusters may only be carried out by...?

3 / 30

If a drain valve on any tank is not functioning properly, it must be...?

4 / 30

A long stroke size 24 brake chamber will have which of these markings?

5 / 30

The most common brake chamber size is...?

6 / 30

The pushrod stroke should be inspected at least...?

7 / 30

Before measuring the applied pushrod stroke, you should ensure the air pressure is above...?

8 / 30

A standard stroke brake chamber will have what sort of port?

9 / 30

Automatic slack adjusters can only be repaired by...?

10 / 30

A size 36 brake chamber will be marked with...?

11 / 30

Which of these items is it optional to bring to the practical test for airbrake certification?

12 / 30

Which of these is not part of the air supply subsystem circuit?

13 / 30

Proper inspection of air brakes must be undertaken regularly by...?

14 / 30

To inspect the low air warning device, the ignition key should be...?

15 / 30

Marks made in measuring pushrod strokes must be...?

16 / 30

Which of these is not part of the trailer brake subsystem circuit?

17 / 30

Which of these items do you not need to bring to your test if being tested for motor coaches?

18 / 30

Before measuring the applied pushrod stroke, you should ensure the air pressure does not exceed...?

19 / 30

If your vehicle has automatic slack adjusters, inspection of brake adjustment...?

20 / 30

A long stroke brake chamber can be identified by the fact that it will have...?

21 / 30

Brake chamber size can be determined by measuring...?

22 / 30

If you are performing a brake adjustment inspection as part of the practical test, you must be equipped with...?

23 / 30

Being able to demonstrate an applied pushrod stroke measurement method of inspection is compulsory for...?

24 / 30

When measuring the pushrod stroke, this should be done with the brake pedal...?

25 / 30

As your brakes wear, brake pushrod stroke will...?

26 / 30

When performing an inspection as part of the practical examination, you should...?

27 / 30

Pushrod stroke measurements should be done with the engine...?

28 / 30

The only tank from which it is acceptable to observe a significant amount of moisture being discharged is...?

29 / 30

Which of these is not part of the air supply subsystem circuit?

30 / 30

The brake is out of adjustment when the pushrod stroke...?

Your score is


MTO Air Brake Test

Our free MTO air brake test questions and answers will prepare you to pass Ontario’s official Air Brakes knowledge test. To begin your career in trucking, you must obtain your Ontario Class A or Class D Truck Driver’s Licence. The appropriate CDL endorsements you will need are based on the type of trucking career you plan to pursue. To obtain these endorsements, you must complete a written knowledge test successfully. Making sure you are adequately prepared for your written knowledge test will prevent you from wasting time and money. Taking practice CDL tests is the best way to get ready.

Passing your air brake test doesn’t have to be a stressful experience. Follow this important tip, and you should pass the test without a problem.

Think Positively – It is essential to think positively on test days. You have studied well, take a few practice tests, gotten enough rest, and had a good breakfast. You know the information and are ready to prove it. All your preparation will give you the confidence to succeed on the test.

As stated above, practice tests greatly help prepare for your written air brake test. Please contact us for some helpful practice tests.