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

Normal air brake system pressure range is around...

70 to 90 psi

100 to 120 psi

130 to 140 psi

80 to 90 psi

2 / 30

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

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

None of the above

Pushes it into air hoses

Forces it into larger containers for future use

3 / 30

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

It only occurs with smaller air hoses

It occurs in all air brake systems

It occurs in older systems

It only occurs with tandem trailers

4 / 30

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

80 psi

110 psi

60 psi

90 psi

5 / 30

Abnormal pressure readings should always be verified by...

The carrier

All of the above

The driver

A technician

6 / 30

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

Brake failure

Fire

Quick stops

Brake fade

7 / 30

Brakes convert the energy of a moving vehicle into what?

Air

Nothing

Sludge

Heat

8 / 30

What happens when brake drums overheat?

They become thicker

They thin out

Nothing

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

9 / 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

10 / 30

Why are air brakes used on heavy commercial vehicles?

They are cheaper to maintain

They come with the manufacturer

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

They fit better on the larger wheel hubs

11 / 30

Which type of vehicles use air-over hydraulic brakes

With tandem trailers

Mainly on medium-duty commercial vehicles

All of the above

On heavy duty vehicles

12 / 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

None of the above

Through special ports

By the brakes and their components

13 / 30

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

20 to 25 psi

5 to 10 psi

30 to 35 psi

10 to 15 psi

14 / 30

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

None of the above

The brake shoes press outward against the drum's surface

The drums move to make contact with the shoes

The brake shoes move up toward the centre of the drums

15 / 30

What powers the air compressor?

A fan

A generator

Nature air flow outside the vehicle

The engine

16 / 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

17 / 30

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

Use the engine brakes for a while

Turn on the brake fan

None of the above

Stop and allow them to cool before proceeding

18 / 30

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

Yes

Only with school buses

Only with tow trucks

19 / 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

20 / 30

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

Main brakes

Principle brakes

Foundation brakes

Primary brakes

21 / 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

Special valves

All of the above

A compressor

22 / 30

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

Cut-out pressure

Cut-down pressure

Cut-up pressure

Cut-in pressure

23 / 30

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

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

The shoes press against the pads

The shoes press against the inside of the disc

The discs press against the drums

24 / 30

What's the purpose of the air compressor?

Produces air for the tires

Nothing

Cools the engine

Produces air for the braking system

25 / 30

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

Air parking brakes

Hydraulic brakes

Cable brakes

Air-over hydraulic brakes

26 / 30

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

Cut-up pressure

Cut-out pressure

Cut-down pressure

Cut-in pressure

27 / 30

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

Just with buses

Yes

Only with a stronger brake cylinder

28 / 30

What happens if there is a single malfunctioning brake?

The emergency brakes kick in

All the brakes begin the fail

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

The vehicle stops quickly

29 / 30

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

30 / 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 off for a period of 5 minutes

Turns on and stays on

Turns on and turns off

Your score is

Ontario Air Brake Test 01

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