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

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

2 / 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

A compressor

Special valves

All of the above

3 / 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 shoes press against the inside of the disc

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

4 / 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

Yes

In certain municipalities

5 / 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

6 / 30

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

Cut-down pressure

Cut-out pressure

Cut-up pressure

Cut-in pressure

7 / 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

Forces it into larger containers for future use

Pushes it into air hoses

8 / 30

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

Cut-down pressure

Cut-up pressure

Cut-in pressure

Cut-out pressure

9 / 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?

By the brakes and their components

None of the above

Through special ports

Into the air lines

10 / 30

What powers the air compressor?

The engine

Nature air flow outside the vehicle

A fan

A generator

11 / 30

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

Primary brakes

Foundation brakes

Principle brakes

Main brakes

12 / 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 30 minutes

Turns on and turns off

Turns off for a period of 5 minutes

13 / 30

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

30 to 35 psi

10 to 15 psi

20 to 25 psi

5 to 10 psi

14 / 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 occurs in all air brake systems

It only occurs with tandem trailers

It only occurs with smaller air hoses

15 / 30

What happens when brake drums overheat?

They become thicker

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

Nothing

They thin out

16 / 30

Air compressors are designed to run whenever...

The spring brakes are activated

Whenever the driver flips the switch

There is a brake fade or failure

The engine is running

17 / 30

What happens if there is a single malfunctioning brake?

The vehicle stops quickly

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

18 / 30

Why are air brakes used on heavy commercial vehicles?

They come with the manufacturer

They are cheaper to maintain

They fit better on the larger wheel hubs

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

19 / 30

What's the purpose of the air compressor?

Nothing

Cools the engine

Produces air for the tires

Produces air for the braking system

20 / 30

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

Fire

Brake fade

Brake failure

Quick stops

21 / 30

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

Air parking brakes

Hydraulic brakes

Air-over hydraulic brakes

Cable brakes

22 / 30

Normal air brake system pressure range is around...

80 to 90 psi

100 to 120 psi

70 to 90 psi

130 to 140 psi

23 / 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

The brake shoes move up toward the centre of the drums

None of the above

24 / 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

Only with school buses

Yes

25 / 30

Which type of vehicles use air-over hydraulic brakes

Mainly on medium-duty commercial vehicles

With tandem trailers

All of the above

On heavy duty vehicles

26 / 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

27 / 30

Brakes convert the energy of a moving vehicle into what?

Heat

Nothing

Air

Sludge

28 / 30

Abnormal pressure readings should always be verified by...

A technician

The driver

All of the above

The carrier

29 / 30

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

Only with a stronger brake cylinder

Yes

Just with buses

30 / 30

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

60 psi

80 psi

90 psi

110 psi

Your score is

By WordPress Quiz plugin

Ontario Air Brake Test 01

About

Practice Tests

Getting a License

Get In Touch