ONTARIO AIR BRAKE PRACTICE TEST 01

Preparing for the Ontario Air Brake test can be a daunting task, but with our free practice tests, you can gain the confidence and knowledge needed to pass the exam on your first try.

These practice tests include questions and scenarios that are similar to those you will encounter on the actual test.

Ontario Air Brake Test 01

1 / 30

Spring brakes will normally start to apply when system pressure drops below...?

614 kPa (89 psi)

514 kPa (74 psi)

314 kPa (45 psi)

414 kPa (60 psi)

2 / 30

Moisture in an air brake system can be dangerous for what reason?

All of these

It can reduce the volume of air

It can freeze in cold temperatures

It can cause corrosion

3 / 30

Why do air brake systems have dual-service tanks?

For efficiency

For economy

For safety

For power

4 / 30

Normal air brake system pressure range is aroundâ€¦?

138 to 173 kPa (20 to 25 psi)

1035 to 1135 kPa (150 to 164 psi)

690 to 828 kPa (100 to 120 psi)

380 to 420 kPa (55 to 60 psi)

5 / 30

The spring brake subsystem is designed for which of these?

Normal stopping

All of these

Heavy skidding

Parking and emergencies

6 / 30

Which of these vehicles is most likely to have air brakes?

A school bus

A large sedan

A motorcycle

A pickup truck

7 / 30

In an air brake system, the service brake subsystem is used for what?

All of these

Emergency braking

Parking

Normal braking

8 / 30

The pushrod stroke is produced by compressed air entering...?

The primary tank

The brake chamber

The wet tank

The compressor

9 / 30

Where will you find the air pressure gauge for an air brake system?

On the vehicle dashboard

Next to the compressor

Underneath the vehicle hood

Attached to the brake discs

10 / 30

Which is the only one of these that is part of a disc brake system?

Drum

Lining

Shoe

Rotor

11 / 30

As you press down on the brake pedal, what happens to the valve which is attached to it?

It opens wider

It remains the same

Any of these depending how hard you press

It starts to narrow

12 / 30

Spring brakes are applied when...?

Air pressure leaves the brake chamber

Air pressure builds up in the wet tank

Air pressure builds up in the brake chamber

Air pressure reduces in the compressor

13 / 30

In a normal braking situation, most modern air brake vehicles will use automatic valves to do what?

Reduce the pressure at the rear wheels

Increase the pressure at the front wheels

Increase the pressure at the rear wheels

Reduce the pressure at the front wheels

14 / 30

If an air brake system has an air dryer, where will it be found?

Between the supply tank and the second tank

In any of these locations

Between the second tank and the third tank

Between the compressor and the supply tank

15 / 30

A braking system works by converting mechanical energy into what?

Water

Heat

Gas

Air

16 / 30

When draining tanks on an air brake system, which tank should be drained first?

The supply tank

The second air tank

The third air tank

The last air tank

17 / 30

In an air brake system, what does the governor do?

Regulates the amount of air released to the brakes

Regulates the revolutions of the engine

Regulates the speed of your vehicle

Regulates the air pressure

18 / 30

Which of these can you expect from an air brake system that you will not get in a hydraulic brake system?

More wheel lock

Less efficient braking

A split second delay

More efficient braking

19 / 30

The air tanks for an air brake system can be found where?

On top of the vehicle cab

Under or around the frame of the vehicle

Above the rear license plate

On top of the engine

20 / 30

Why is it important for you to know where compressed air from the air brake system on your vehicle exhausts?

Because it can be dangerous

It isn't particularly important

So that you can check their pressure

So that you can clean them

21 / 30

At what pressure do safety valves on air brake systems normally open?

1135 kPa (164 psi)

1235 kPa (179 psi)

1035 kPa (150 psi)

935 kPa (135 psi)

22 / 30

Where will you find air brake chambers?

To the compressor

On each wheel

On the front wheels

On the rear wheels

23 / 30

In an air brake system, what purpose does the alcohol evaporator serve?

To slow the system down

To prevent overheating

To prevent freezing

To increase pressure

24 / 30

If you are driving and a warning tells you that your air pressure is low, what should you do?

Alert the mechanics at the end of your journey

Have it checked at the next garage

Stop immediately

Proceed at a low speed

25 / 30

Which of these persons can perform brake readjustments on manual and automatic slack adjusters?

Regular mechanics

Certified technicians

Drivers licensed to operate air brake vehicles

Vehicle owners

26 / 30

The supply tank for an air brake system does what?

Collects only oil from the air

Collects only moisture from the air

Adds moisture to the air

Collects moisture and oil from the air

27 / 30

The air compressor for an air brake system draws its power from where?

The vehicle's battery

The vehicle's fan intake

The vehicle's engine

The vehicle's wheels

28 / 30

Under the Ontario Highway Traffic Act, an air brake system should never drop below what pressure?

617 kPa (89 psi)

334 kPa (48 psi)

552 kPa (80 psi)

436 kPa (63 psi)

29 / 30

A warning device must alert the driver if the pressure in the air brake system falls to what level?

360 kPa (52 psi)

420 kPa (60 psi)

380 kPa (55 psi)

320 kPa (46 psi)

30 / 30

Many vehicle manufacturers recommend draining moisture and oil from a vehicle's air tanks at what interval?

Daily

Weekly

Monthly

Hourly

Your score is

Ontario Air Brake Practice Test

Our free Ontario Air Brake practice 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.

Start Preparing Early – Don’t try to cram the night before. Give yourself a few weeks to study the materials, such as this Ontario air brake practice test. Trying to learn all the information in a couple of days will only cause unneeded stress and anxiety during test time. Relax, take your time, and study at a comfortable pace.