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

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 only occurs with tandem trailers

It occurs in all air brake systems

It occurs in older systems

2 / 30

Brakes convert the energy of a moving vehicle into what?

Sludge

Nothing

Air

Heat

3 / 30

Which type of vehicles use air-over hydraulic brakes

On heavy duty vehicles

All of the above

Mainly on medium-duty commercial vehicles

With tandem trailers

4 / 30

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

Brake fade

Quick stops

Fire

Brake failure

5 / 30

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

6 / 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

7 / 30

What happens when brake drums overheat?

They become thicker

Nothing

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

They thin out

8 / 30

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

Stop and allow them to cool before proceeding

Turn on the brake fan

None of the above

Use the engine brakes for a while

9 / 30

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

Cut-down pressure

Cut-up pressure

Cut-out pressure

Cut-in pressure

10 / 30

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

110 psi

90 psi

80 psi

60 psi

11 / 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

Pushes it into air hoses

None of the above

Forces it into larger containers for future use

12 / 30

Air compressors are designed to run whenever...

Whenever the driver flips the switch

The engine is running

There is a brake fade or failure

The spring brakes are activated

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 5 minutes

Turns on and turns off

Turns on and stays on

Turns off for a period of 30 minutes

14 / 30

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

None of the above

The brake shoes move up toward the centre of the drums

The drums move to make contact with the shoes

The brake shoes press outward against the drum's surface

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?

Yes

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

If traveling more than 160 km from your home base

16 / 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

17 / 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 inside of the disc

The shoes press against the pads

The discs press against the drums

18 / 30

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

Main brakes

Foundation brakes

Principle brakes

Primary brakes

19 / 30

What powers the air compressor?

The engine

Nature air flow outside the vehicle

A generator

A fan

20 / 30

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

Cable brakes

Air parking brakes

Air-over hydraulic brakes

Hydraulic brakes

21 / 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

22 / 30

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

5 to 10 psi

30 to 35 psi

20 to 25 psi

10 to 15 psi

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?

By the brakes and their components

Through special ports

Into the air lines

None of the above

24 / 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

All of the above

A compressor

Special valves

25 / 30

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

Cut-in pressure

Cut-out pressure

Cut-up pressure

Cut-down pressure

26 / 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 vehicle stops quickly

The emergency brakes kick in

All the brakes begin the fail

27 / 30

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

Yes

Just with buses

Only with a stronger brake cylinder

28 / 30

Abnormal pressure readings should always be verified by...

The carrier

A technician

All of the above

The driver

29 / 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

30 / 30

What's the purpose of the air compressor?

Produces air for the tires

Produces air for the braking system

Cools the engine

Nothing

Your score is

Ontario Air Brake Test 01

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