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

What do front wheel-limiting valves do?

Stop air flow to the front brakes

Stabilize the pressure so it is equal in all wheels

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

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

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 recorded voice

A bell

A warning buzzer

An alarm

3 / 30

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

Natural force

A pulley

The spring inside the chamber

Forced air

4 / 30

What is referred to as stroke length?

The distance that the pushrod travels into the chamber

The size of the pushrod

The distance that the pushrod travels out of the chamber

The thickness of the pushrod

5 / 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

6 / 30

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

Yes

Depends on the manufacturer

Depending on the age of the vehicle

7 / 30

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

Yes, but only within city limits

Only when directed by a qualified technician

Yes

8 / 30

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

Maintenance schedule

Maximum thrust

Minimum thrust

Pushrod stroke-adjustment limit

9 / 30

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

The material the brake chamber is made of

The type of brake chamber

The style of brake chamber

That size of brake chamber

10 / 30

Safety valves normally open at what psi?

150 psi

120 psi

175 psi

180 psi

11 / 30

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

Certified technicians

All of the above

Vehicle owners

Drivers

12 / 30

Air pressure gauges indicate air pressure in which air tanks?

The wet tank

All of the tanks

Dual tanks

Service tank

13 / 30

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

Big wag

Mig mag

Wig mag

Wig wag

14 / 30

What is referred to as pushrod stroke length?

The distance that the pushrod travels out of the chamber

The length of the chamber the pushrod travels through

How long it takes for the slack adjuster to adjust

The size of the pushrod

15 / 30

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

A dual chamber

A spring brake chamber

A service brake chamber

A double chamber

16 / 30

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

The size of the wet tank

The vehicle manufacturer

All of the above

The size of the compressor

17 / 30

What contains the brake drum or disc?

The slack adjusters

The hubs

The brake assembly

The shoes

18 / 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

19 / 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

20 / 30

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

45 psi

35 psi

55 psi

65 psi

21 / 30

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

Simultaneously

Separately

Remotely

In unison

22 / 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

None of the above

It causes brake failure

The spring brakes will apply

23 / 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

24 / 30

How many kinds of air brake chambers are there?

Four

One

Three

Two

25 / 30

What links the brake chamber to the brake assembly?

Hinges

Clamps

The pushrod and a slack adjuster

The pushrod and brackets

26 / 30

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

A diaphragm

A puck

A diagram

A stopper

27 / 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...

Air-dryer exhaust port

Exhaust ports of brake valves

Compressor drain ports

On or near the vehicle's axles

28 / 30

How are spring brakes applied?

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

They apply when the driver pulls a lever

None of the above

29 / 30

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

Moisture

Dirt

Metal fragments

Oil

30 / 30

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

Yes

Only fire trucks

Not the older vehicles

Only tractor trailers

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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