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

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

Forces it into larger containers for future use

Pushes it into air hoses

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

None of the above

2 / 30

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

80 psi

110 psi

90 psi

60 psi

3 / 30

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

Cut-out pressure

Cut-in pressure

Cut-down pressure

Cut-up pressure

4 / 30

Normal air brake system pressure range is around...

130 to 140 psi

80 to 90 psi

100 to 120 psi

70 to 90 psi

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?

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

If traveling more than 160 km from your home base

Yes

6 / 30

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

Quick stops

Brake failure

Fire

Brake fade

7 / 30

What powers the air compressor?

The engine

Nature air flow outside the vehicle

A fan

A generator

8 / 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

9 / 30

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

Foundation brakes

Main brakes

Principle brakes

Primary brakes

10 / 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

A governor

Special valves

All of the above

11 / 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 only occurs with tandem trailers

It only occurs with smaller air hoses

It occurs in all air brake systems

12 / 30

The normal pressure range of an air brake system is determined by the points where the air compressor...

Turns on and turns off

Turns off for a period of 30 minutes

Turns off for a period of 5 minutes

Turns on and stays on

13 / 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

14 / 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

None of the above

Into the air lines

By the brakes and their components

15 / 30

What happens if there is a single malfunctioning brake?

The emergency brakes kick in

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

All the brakes begin the fail

The vehicle stops quickly

16 / 30

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

Yes

Just with buses

Only with a stronger brake cylinder

17 / 30

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

Use the engine brakes for a while

Stop and allow them to cool before proceeding

Turn on the brake fan

None of the above

18 / 30

Which type of vehicles use air-over hydraulic brakes

Mainly on medium-duty commercial vehicles

With tandem trailers

On heavy duty vehicles

All of the above

19 / 30

Brakes convert the energy of a moving vehicle into what?

Air

Nothing

Sludge

Heat

20 / 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

21 / 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

22 / 30

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

Air-over hydraulic brakes

Cable brakes

Hydraulic brakes

Air parking brakes

23 / 30

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

Cut-in pressure

Cut-up pressure

Cut-out pressure

Cut-down pressure

24 / 30

Abnormal pressure readings should always be verified by...

The carrier

The driver

A technician

All of the above

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's the purpose of the air compressor?

Nothing

Cools the engine

Produces air for the tires

Produces air for the braking system

27 / 30

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

28 / 30

Why are air brakes used on heavy commercial vehicles?

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

They come with the manufacturer

They fit better on the larger wheel hubs

They are cheaper to maintain

29 / 30

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

10 to 15 psi

5 to 10 psi

30 to 35 psi

20 to 25 psi

30 / 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

The brake shoes move up toward the centre of the drums

None of the above

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Ontario Air Brake Test 01

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