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

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

All of the above

Drivers

Vehicle owners

Certified technicians

2 / 30

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

A warning buzzer

A recorded voice

An alarm

A bell

3 / 30

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

Only fire trucks

Only tractor trailers

Not the older vehicles

Yes

4 / 30

What is referred to as pushrod stroke length?

The distance that the pushrod travels out of the chamber

The size of the pushrod

The length of the chamber the pushrod travels through

How long it takes for the slack adjuster to adjust

5 / 30

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

Separately

Simultaneously

In unison

Remotely

6 / 30

Safety valves normally open at what psi?

180 psi

120 psi

175 psi

150 psi

7 / 30

How many kinds of air brake chambers are there?

One

Three

Four

Two

8 / 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

9 / 30

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

The size of the compressor

The vehicle manufacturer

All of the above

The size of the wet tank

10 / 30

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

The spring inside the chamber

Forced air

Natural force

A pulley

11 / 30

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

Metal fragments

Moisture

Dirt

Oil

12 / 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

13 / 30

What links the brake chamber to the brake assembly?

The pushrod and a slack adjuster

Hinges

The pushrod and brackets

Clamps

14 / 30

What is the pushrod stroke dependent on?

The size of the pads

The amount of compressed air going through the air hoses

The size of the discs

The pressure of the compressed air that enters the brake chamber

15 / 30

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

Wig mag

Mig mag

Big wag

Wig wag

16 / 30

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

Provides enough force to hold the brakes in the applied position

None of the above

Pushes the brake shoes onto the drums

Clamps the discs to the rotors

17 / 30

What contains the brake drum or disc?

The hubs

The brake assembly

The shoes

The slack adjusters

18 / 30

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

A dual chamber

A double chamber

A service brake chamber

A spring brake chamber

19 / 30

How are spring brakes applied?

None of the above

They apply when the driver pulls a lever

They apply when the driver pushes down on a lever

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

20 / 30

The pushrod stroke is dependent on what?

The pressure of the compressed air that enters the brake chamber

How hard the brakes are applied

None of the above

The manufacturer's design

21 / 30

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

A stopper

A puck

A diaphragm

A diagram

22 / 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...

Compressor drain ports

On or near the vehicle's axles

Exhaust ports of brake valves

Air-dryer exhaust port

23 / 30

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

35 psi

55 psi

45 psi

65 psi

24 / 30

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

Maximum thrust

Pushrod stroke-adjustment limit

Maintenance schedule

Minimum thrust

25 / 30

What is referred to as stroke length?

The size of the pushrod

The distance that the pushrod travels out of the chamber

The distance that the pushrod travels into the chamber

The thickness of the pushrod

26 / 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 bushing

None of the above

A pushrod

A valve

27 / 30

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

Yes

Depending on the age of the vehicle

Depends on the manufacturer

28 / 30

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

That size of brake chamber

The material the brake chamber is made of

The type of brake chamber

The style of brake chamber

29 / 30

Air pressure gauges indicate air pressure in which air tanks?

All of the tanks

Service tank

Dual tanks

The wet tank

30 / 30

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

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

The spring brakes will apply

It causes brake failure

None of the above

Your score is

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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