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

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

2 / 30

Air compressors are designed to run whenever...

Whenever the driver flips the switch

The spring brakes are activated

There is a brake fade or failure

The engine is running

3 / 30

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

4 / 30

Abnormal pressure readings should always be verified by...

All of the above

The carrier

The driver

A technician

5 / 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 emergency brakes kick in

All the brakes begin the fail

The vehicle stops quickly

6 / 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 stays on

Turns on and turns off

Turns off for a period of 5 minutes

7 / 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

Into the air lines

None of the above

By the brakes and their components

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 all air brake systems

It only occurs with tandem trailers

It only occurs with smaller air hoses

It occurs in older systems

9 / 30

Which type of vehicles use air-over hydraulic brakes

On heavy duty vehicles

Mainly on medium-duty commercial vehicles

With tandem trailers

All of the above

10 / 30

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

Just with buses

Yes

Only with a stronger brake cylinder

11 / 30

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

The discs press against the drums

The shoes press against the pads

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

The shoes press against the inside of the disc

12 / 30

Brakes convert the energy of a moving vehicle into what?

Air

Heat

Nothing

Sludge

13 / 30

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

Only with school buses

Only with tow trucks

Yes

14 / 30

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

Air parking brakes

Air-over hydraulic brakes

Hydraulic brakes

Cable brakes

15 / 30

What's the purpose of the air compressor?

Produces air for the tires

Cools the engine

Nothing

Produces air for the braking system

16 / 30

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

The drums move to make contact with the shoes

The brake shoes press outward against the drum's surface

None of the above

The brake shoes move up toward the centre of the drums

17 / 30

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

Quick stops

Brake failure

Brake fade

Fire

18 / 30

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

Cut-up pressure

Cut-in pressure

Cut-out pressure

Cut-down pressure

19 / 30

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

60 psi

80 psi

110 psi

90 psi

20 / 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

If traveling more than 160 km from your home base

Yes

21 / 30

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

Turn on the brake fan

Stop and allow them to cool before proceeding

Use the engine brakes for a while

None of the above

22 / 30

Normal air brake system pressure range is around...

100 to 120 psi

130 to 140 psi

70 to 90 psi

80 to 90 psi

23 / 30

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

Cut-down pressure

Cut-up pressure

Cut-out pressure

Cut-in pressure

24 / 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

25 / 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?

In certain municipalities

Only if company policy

Yes

26 / 30

What powers the air compressor?

Nature air flow outside the vehicle

A generator

The engine

A fan

27 / 30

What happens when brake drums overheat?

They become thicker

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

They thin out

Nothing

28 / 30

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

Primary brakes

Principle brakes

Foundation brakes

Main brakes

29 / 30

Why are air brakes used on heavy commercial vehicles?

They fit better on the larger wheel hubs

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

They are cheaper to maintain

They come with the manufacturer

30 / 30

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

Forces it into larger containers for future use

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

None of the above

Pushes it into air hoses

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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