Ontario Air Brake Test 03

If you are planning on taking the Ontario air brake test, it is highly recommended that you take the practice test beforehand. The practice test will help you familiarize yourself with the format of the real test, as well as give you an idea of the types of questions that will be asked. It is important to note that the air brake test is specifically designed for drivers of vehicles equipped with air brakes, so if you do not fall into this category, you may need to take a different type of test. The practice test is online and can be taken multiple times, allowing you to identify areas where you need improvement. It is important to score at least 80% on the practice test before attempting the real test. Overall, taking the Ontario air brake practice test is an important step in obtaining your air brake endorsement and maintaining safe driving practices.

1 / 30

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

A diaphragm

A stopper

A diagram

A puck

2 / 30

The pushrod stroke is dependent on what?

None of the above

The manufacturer's design

How hard the brakes are applied

The pressure of the compressed air that enters the brake chamber

3 / 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

Exhaust ports of brake valves

Air-dryer exhaust port

On or near the vehicle's axles

4 / 30

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

Pushrod stroke-adjustment limit

Maximum thrust

Minimum thrust

Maintenance schedule

5 / 30

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

The vehicle manufacturer

The size of the wet tank

All of the above

The size of the compressor

6 / 30

What contains the brake drum or disc?

The brake assembly

The hubs

The slack adjusters

The shoes

7 / 30

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

All of the above

Certified technicians

Vehicle owners

Drivers

8 / 30

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

Pushes the brake shoes onto the drums

Clamps the discs to the rotors

Provides enough force to hold the brakes in the applied position

None of the above

9 / 30

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

None of the above

It causes brake failure

The spring brakes will apply

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

10 / 30

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

Wig mag

Wig wag

Big wag

Mig mag

11 / 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

That size of brake chamber

The type of brake chamber

The material the brake chamber is made of

12 / 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

13 / 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?

None of the above

A bushing

A valve

A pushrod

14 / 30

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

Yes

Only tractor trailers

Only fire trucks

Not the older vehicles

15 / 30

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

A service brake chamber

A double chamber

A spring brake chamber

A dual chamber

16 / 30

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

Metal fragments

Dirt

Moisture

Oil

17 / 30

What is referred to as stroke length?

The size of the pushrod

The thickness of the pushrod

The distance that the pushrod travels into the chamber

The distance that the pushrod travels out of the chamber

18 / 30

What links the brake chamber to the brake assembly?

Clamps

The pushrod and a slack adjuster

Hinges

The pushrod and brackets

19 / 30

Safety valves normally open at what psi?

150 psi

180 psi

175 psi

120 psi

20 / 30

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

In unison

Separately

Remotely

Simultaneously

21 / 30

What do front wheel-limiting valves do?

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

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

22 / 30

What is the pushrod stroke dependent on?

The amount of compressed air going through the air hoses

The pressure of the compressed air that enters the brake chamber

The size of the discs

The size of the pads

23 / 30

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

Depending on the age of the vehicle

Yes

Depends on the manufacturer

24 / 30

What is referred to as pushrod stroke length?

The size of the pushrod

How long it takes for the slack adjuster to adjust

The distance that the pushrod travels out of the chamber

The length of the chamber the pushrod travels through

25 / 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

26 / 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

A bell

An alarm

27 / 30

How many kinds of air brake chambers are there?

Three

Two

Four

One

28 / 30

Air pressure gauges indicate air pressure in which air tanks?

All of the tanks

The wet tank

Service tank

Dual tanks

29 / 30

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

55 psi

65 psi

45 psi

35 psi

30 / 30

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

Natural force

Forced air

The spring inside the chamber

A pulley

Your score is

Ontario Air Brake Test 03

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