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

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

Cut-in pressure

Cut-out pressure

Cut-down pressure

Cut-up pressure

2 / 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

3 / 30

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

10 to 15 psi

5 to 10 psi

20 to 25 psi

30 to 35 psi

4 / 30

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

90 psi

80 psi

60 psi

110 psi

5 / 30

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

Only with tow trucks

Yes

Only with school buses

6 / 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?

None of the above

By the brakes and their components

Through special ports

Into the air lines

7 / 30

What powers the air compressor?

Nature air flow outside the vehicle

A generator

The engine

A fan

8 / 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 older systems

It only occurs with tandem trailers

It only occurs with smaller air hoses

It occurs in all air brake systems

9 / 30

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

None of the above

The drums move to make contact with the shoes

The brake shoes press outward against the drum's surface

The brake shoes move up toward the centre of the drums

10 / 30

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

The shoes press against the pads

The discs press against the drums

The shoes press against the inside of the disc

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

11 / 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 compressor

All of the above

A governor

Special valves

12 / 30

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

13 / 30

Normal air brake system pressure range is around...

80 to 90 psi

130 to 140 psi

100 to 120 psi

70 to 90 psi

14 / 30

What happens when brake drums overheat?

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

Nothing

They become thicker

They thin out

15 / 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?

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

Yes

If traveling more than 160 km from your home base

16 / 30

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

Turns off for a period of 30 minutes

Turns on and turns off

Turns off for a period of 5 minutes

Turns on and stays on

17 / 30

Which type of vehicles use air-over hydraulic brakes

All of the above

With tandem trailers

Mainly on medium-duty commercial vehicles

On heavy duty vehicles

18 / 30

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

Primary brakes

Principle brakes

Main brakes

Foundation brakes

19 / 30

Brakes convert the energy of a moving vehicle into what?

Sludge

Nothing

Heat

Air

20 / 30

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

Cut-down pressure

Cut-up pressure

Cut-out pressure

Cut-in pressure

21 / 30

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

Air parking brakes

Cable brakes

Air-over hydraulic brakes

Hydraulic brakes

22 / 30

Abnormal pressure readings should always be verified by...

The driver

The carrier

All of the above

A technician

23 / 30

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

Just with buses

Only with a stronger brake cylinder

Yes

24 / 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?

Only if company policy

In certain municipalities

Yes

25 / 30

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

Use the engine brakes for a while

None of the above

Turn on the brake fan

Stop and allow them to cool before proceeding

26 / 30

What's the purpose of the air compressor?

Produces air for the braking system

Nothing

Cools the engine

Produces air for the tires

27 / 30

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

Quick stops

Fire

Brake fade

Brake failure

28 / 30

Air compressors are designed to run whenever...

The engine is running

The spring brakes are activated

There is a brake fade or failure

Whenever the driver flips the switch

29 / 30

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

Pushes it into air hoses

Forces it into larger containers for future use

None of the above

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

30 / 30

What happens if there is a single malfunctioning brake?

The emergency brakes kick in

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

The vehicle stops quickly

All the brakes begin the fail

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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