Ontario Air Brake Test 03

If you plan to take the Ontario air brake test, it is highly recommended that you take the practice test beforehand.

1 / 30

How are spring brakes applied?

They apply when air pressure leaves the brake chamber and release when air pressure builds up in the chamber

None of the above

They apply when the driver pulls a lever

They apply when the driver pushes down on a lever

2 / 30

What links the brake chamber to the brake assembly?

The pushrod and a slack adjuster

Clamps

The pushrod and brackets

Hinges

3 / 30

What is the pushrod stroke dependent on?

The size of the pads

The pressure of the compressed air that enters the brake chamber

The size of the discs

The amount of compressed air going through the air hoses

4 / 30

Safety valves normally open at what psi?

175 psi

120 psi

180 psi

150 psi

5 / 30

Due to the design of brake chambers, does each have a limited pushrod stroke-length capacity?

Depends on the manufacturer

Yes

Depending on the age of the vehicle

6 / 30

Who may perform brake re-adjustments on manual and automatic slack adjusters?

Drivers

All of the above

Certified technicians

Vehicle owners

7 / 30

Vehicles with air brakes must have separate brake systems for normal stopping and for parking and emergency braking and these systems are controlled...

Remotely

Simultaneously

In unison

Separately

8 / 30

What is referred to as stroke length?

The thickness of the pushrod

The distance that the pushrod travels out of the chamber

The size of the pushrod

The distance that the pushrod travels into the chamber

9 / 30

A brake chamber that includes both service brake and spring brake sections is called...

A spring brake chamber

A double chamber

A dual chamber

A service brake chamber

10 / 30

Some vehicles may have another device that warns of low pressure. What is this called?

Wig mag

Wig wag

Mig mag

Big wag

11 / 30

Which statement is false? To avoid being in the direct path of air exhausting from the air brake system, you should be familiar with all the places where the compressed air exhausts, including...

Exhaust ports of brake valves

Compressor drain ports

Air-dryer exhaust port

On or near the vehicle's axles

12 / 30

A service brake chamber contains a flexible rubber disc called...

A stopper

A puck

A diaphragm

A diagram

13 / 30

Which statement is false? Compressed air leaving the vehicle travels at a very high speed and will carry...

Moisture

Metal fragments

Dirt

Oil

14 / 30

Do all manufacturers currently follow an industry colour code for hoses and tubes?

Yes

Only fire trucks

Only tractor trailers

Not the older vehicles

15 / 30

Spring brake chambers apply the brakes by means of a large coil spring that does what?

Pushes the brake shoes onto the drums

None of the above

Clamps the discs to the rotors

Provides enough force to hold the brakes in the applied position

16 / 30

When you press the brake pedal, compressed air fills the service brake chamber, causing the diaphragm to move and pushes out what to apply the brakes?

A valve

A pushrod

A bushing

None of the above

17 / 30

Are you allowed to drive a vehicle when the air pressure is outside the normal operating range?

Yes

Yes, but only within city limits

Only when directed by a qualified technician

18 / 30

The pushrod stroke is dependent on what?

The manufacturer's design

The pressure of the compressed air that enters the brake chamber

How hard the brakes are applied

None of the above

19 / 30

When air pressure is released, the pushrod is returned to its original position by what?

A pulley

Natural force

The spring inside the chamber

Forced air

20 / 30

Which statement is false? Low air-pressure warning devices must give a visual warning such as a light and may also use...

A recorded voice

An alarm

A bell

A warning buzzer

21 / 30

What contains the brake drum or disc?

The slack adjusters

The brake assembly

The shoes

The hubs

22 / 30

The low-pressure warning device must activate before the pressure in either tank falls to...

65 psi

55 psi

45 psi

35 psi

23 / 30

Which statement is false? The length of pushrod stroke can be measured and compared to the prescribed adjustment limits for the following...

The style of brake chamber

The material the brake chamber is made of

That size of brake chamber

The type of brake chamber

24 / 30

What do front wheel-limiting valves do?

Stop air flow to the front brakes

Minimize the air pressure to the rear brakes so the front brakes get more

Reduce the force of the service brakes on the front steering axle

Stabilize the pressure so it is equal in all wheels

25 / 30

How many kinds of air brake chambers are there?

Four

Three

One

Two

26 / 30

Each brake-chamber style, type and size has a specific what?

Pushrod stroke-adjustment limit

Maximum thrust

Minimum thrust

Maintenance schedule

27 / 30

If one circuit fails from the dual-circuit design, what happens?

None of the above

The spring brakes will apply

The brakes will still operate on the wheels connected to the other circuit

It causes brake failure

28 / 30

Air pressure gauges indicate air pressure in which air tanks?

Dual tanks

All of the tanks

Service tank

The wet tank

29 / 30

The wheels that receive air through the primary or secondary circuits vary, depending on what?

The size of the wet tank

The size of the compressor

The vehicle manufacturer

All of the above

30 / 30

What is referred to as pushrod stroke length?

How long it takes for the slack adjuster to adjust

The length of the chamber the pushrod travels through

The size of the pushrod

The distance that the pushrod travels out of the chamber

Your score is

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The practice exam will help you become accustomed to the format of the actual test and provide insight into the types of questions that may be presented. It is crucial to understand that the air brake exam is tailored for operators of vehicles that have air brakes; therefore, if you do not belong to this group, you might need to take a different type of examination. The practice exam is available online and can be taken multiple times, allowing you to identify areas where you can improve. Achieving a score of at least 80% on the practice exam is essential before you attempt the real test. In conclusion, completing the Ontario air brake practice test is a crucial step toward obtaining your air brake endorsement and promoting safe driving habits.

Ontario Air Brake Test 03

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