Ontario Air Brake Test 01

Taking the Ontario air brake practice test is a crucial step towards becoming a licensed commercial driver in the province. The test evaluates your knowledge of the mechanics and operation of air brake systems, which are essential for the safe operation of large commercial vehicles such as trucks and buses.

1 / 30

Do you need to have an air brake endorsement on your driver's licence to drive a vehicle with air-over-hydraulic brakes in Ontario?

If traveling more than 160 km from your home base

Only if the gross weight is more than 4,600 kg

Yes

2 / 30

If you are driving a vehicle equipped with air brakes, do you need to understand how an air brake system works and how it compares to other vehicle braking systems?

Yes

In certain municipalities

Only if company policy

3 / 30

When you press the brake pedal with drum brakes, what happens?

The brake shoes move up toward the centre of the drums

The drums move to make contact with the shoes

The brake shoes press outward against the drum's surface

None of the above

4 / 30

What happens when brake drums overheat?

Nothing

They expand to the point where they may not even contact the shoe

They thin out

They become thicker

5 / 30

What powers the air compressor?

A generator

Nature air flow outside the vehicle

A fan

The engine

6 / 30

Why are air brakes used on heavy commercial vehicles?

They are cheaper to maintain

They can develop and transmit high mechanical forces over great distances using simple components and connections

They fit better on the larger wheel hubs

They come with the manufacturer

7 / 30

What's the purpose of the air compressor?

Nothing

Produces air for the braking system

Produces air for the tires

Cools the engine

8 / 30

What happens if there is a single malfunctioning brake?

It will increase the work of all the others, causing them to overheat quickly and possibly fail too

The vehicle stops quickly

The emergency brakes kick in

All the brakes begin the fail

9 / 30

The actual air brake system pressure range must never be lower than...

60 psi

90 psi

110 psi

80 psi

10 / 30

What is another phrase for when the air compressor turns off?

Cut-up pressure

Cut-out pressure

Cut-down pressure

Cut-in pressure

11 / 30

What is another name for the brake hardware used in heavy commercial vehicles?

Principle brakes

Foundation brakes

Main brakes

Primary brakes

12 / 30

What is another phrase for when the air compressor turns on?

Cut-out pressure

Cut-up pressure

Cut-in pressure

Cut-down pressure

13 / 30

Abnormal pressure readings should always be verified by...

The driver

All of the above

A technician

The carrier

14 / 30

Other than air brakes, what is not another type of braking system is used on commercial vehicles?

Air-over hydraulic brakes

Hydraulic brakes

Cable brakes

Air parking brakes

15 / 30

When you press the brake pedal, compressed air must travel from one part of the system to another. What ensures the air moves through the system as quickly as possible?

A governor

All of the above

A compressor

Special valves

16 / 30

Can brake fluid be compressed like air in air brake systems?

Only with a stronger brake cylinder

Yes

Just with buses

17 / 30

When brakes overheat due to overuse or improper adjustment, what is it advisable to do?

Turn on the brake fan

None of the above

Use the engine brakes for a while

Stop and allow them to cool before proceeding

18 / 30

Air compressors are designed to run whenever...

There is a brake fade or failure

The engine is running

The spring brakes are activated

Whenever the driver flips the switch

19 / 30

The normal pressure range of an air brake system is determined by the points where the air compressor...

Turns on and stays on

Turns off for a period of 5 minutes

Turns on and turns off

Turns off for a period of 30 minutes

20 / 30

The air compressor draws in air at normal pressure and does what with it?

None of the above

Forces it into larger containers for future use

Forces it into a much smaller space, causing the pressure of the air to increase

Pushes it into air hoses

21 / 30

Do you need an air brake endorsement on your driver's licence to drive a vehicle with air parking brakes?

Yes

Only with tow trucks

Only with school buses

22 / 30

Brakes convert the energy of a moving vehicle into what?

Sludge

Air

Heat

Nothing

23 / 30

When using disc brakes, what happens when you press the brake pedal?

The shoes press against the inside of the disc

The pads press toward each other, clamping against both sides of the rotor's surface

The shoes press against the pads

The discs press against the drums

24 / 30

Which statement is false? Too much heat in the brake pads can create what?

Brake fade

Quick stops

Fire

Brake failure

25 / 30

To stop a moving vehicle, the brake shoes or pads exert pressure on the brake drums or rotors and the resulting friction produces heat that is absorbed and dissipated where?

Through special ports

None of the above

Into the air lines

By the brakes and their components

26 / 30

There is a split-second delay in brake reaction from the moment you apply or release the brake pedal. Is this common?

It occurs in all air brake systems

It only occurs with tandem trailers

It occurs in older systems

It only occurs with smaller air hoses

27 / 30

Cut-out pressure is normally how much above the cut-in pressure?

5 to 10 psi

10 to 15 psi

30 to 35 psi

20 to 25 psi

28 / 30

Normal air brake system pressure range is around...

70 to 90 psi

130 to 140 psi

100 to 120 psi

80 to 90 psi

29 / 30

Which type of vehicles use air-over hydraulic brakes

On heavy duty vehicles

With tandem trailers

All of the above

Mainly on medium-duty commercial vehicles

30 / 30

When you are applying for an Air Brake Endorsement on your license, what letter accompanies your license?

Your score is

The test consists of 30 multiple-choice questions, covering topics such as air brake system components, maintenance, safety, and emergency procedures. The Ontario Ministry of Transportation administers it and offers it for online or in-person testing at designated centers. To pass the test, you must score at least 80%. Your certification is valid for two years. It’s essential to thoroughly study and prepare for the test to ensure proficiency in air brake operation and maintenance, which contributes to road safety for all drivers. Be sure to check out this section dedicated to the Ontario Air Brake Practice Test, which is designed to cater to your specific needs.

Ontario Air Brake Test 01

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