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 safe operation of large commercial vehicles such as trucks and buses. The test consists of 30 multiple-choice questions, covering topics such as air brakes system components, maintenance, safety, and emergency procedures. It is administered by the Ontario Ministry of Transportation and can be taken online or in-person at a designated testing center. To pass the test, you must score at least 80%, and your certification is valid for two years. It’s important to thoroughly study and prepare for the test to ensure that you are proficient in air brake operation and maintenance, which contributes to road safety for all drivers.

1 / 30

What happens when brake drums overheat?

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

They thin out

They become thicker

Nothing

2 / 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 come with the manufacturer

They are cheaper to maintain

3 / 30

What happens if there is a single malfunctioning brake?

The emergency brakes kick in

All the brakes begin the fail

The vehicle stops quickly

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

4 / 30

Air compressors are designed to run whenever...

The engine is running

The spring brakes are activated

Whenever the driver flips the switch

There is a brake fade or failure

5 / 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

6 / 30

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

None of the above

Turn on the brake fan

Stop and allow them to cool before proceeding

Use the engine brakes for a while

7 / 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?

All of the above

Special valves

A compressor

A governor

8 / 30

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

Yes

Only with a stronger brake cylinder

Just with buses

9 / 30

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

The brake shoes press outward against the drum's surface

The drums move to make contact with the shoes

None of the above

The brake shoes move up toward the centre of the drums

10 / 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

11 / 30

Which type of vehicles use air-over hydraulic brakes

On heavy duty vehicles

With tandem trailers

Mainly on medium-duty commercial vehicles

All of the above

12 / 30

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

Cut-down pressure

Cut-in pressure

Cut-up pressure

Cut-out pressure

13 / 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 on and stays on

Turns off for a period of 5 minutes

14 / 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?

Yes

If traveling more than 160 km from your home base

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

15 / 30

What powers the air compressor?

A fan

Nature air flow outside the vehicle

A generator

The engine

16 / 30

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

Cut-up pressure

Cut-out pressure

Cut-in pressure

Cut-down pressure

17 / 30

Abnormal pressure readings should always be verified by...

The driver

A technician

The carrier

All of the above

18 / 30

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

Brake failure

Fire

Brake fade

Quick stops

19 / 30

Normal air brake system pressure range is around...

80 to 90 psi

100 to 120 psi

130 to 140 psi

70 to 90 psi

20 / 30

What's the purpose of the air compressor?

Cools the engine

Produces air for the braking system

Nothing

Produces air for the tires

21 / 30

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

80 psi

90 psi

110 psi

60 psi

22 / 30

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

23 / 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?

Into the air lines

By the brakes and their components

None of the above

Through special ports

24 / 30

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

The shoes press against the pads

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 discs press against the drums

25 / 30

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

Foundation brakes

Primary brakes

Main brakes

Principle brakes

26 / 30

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

Air-over hydraulic brakes

Cable brakes

Air parking brakes

Hydraulic brakes

27 / 30

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

Pushes it into air hoses

None of the above

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

Forces it into larger containers for future use

28 / 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

Yes

Only if company policy

29 / 30

Brakes convert the energy of a moving vehicle into what?

Air

Nothing

Heat

Sludge

30 / 30

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

5 to 10 psi

20 to 25 psi

30 to 35 psi

10 to 15 psi

Your score is

Ontario Air Brake Test 01

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