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

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

2 / 30

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

Only when directed by a qualified technician

Yes

Yes, but only within city limits

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...

Air-dryer exhaust port

Compressor drain ports

Exhaust ports of brake valves

On or near the vehicle's axles

4 / 30

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

Dirt

Metal fragments

Moisture

Oil

5 / 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

A pushrod

A valve

None of the above

6 / 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

7 / 30

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

A stopper

A diagram

A diaphragm

A puck

8 / 30

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

Clamps the discs to the rotors

Pushes the brake shoes onto the drums

Provides enough force to hold the brakes in the applied position

None of the above

9 / 30

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

45 psi

35 psi

65 psi

55 psi

10 / 30

Air pressure gauges indicate air pressure in which air tanks?

Service tank

The wet tank

All of the tanks

Dual tanks

11 / 30

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

Certified technicians

All of the above

Drivers

Vehicle owners

12 / 30

What is referred to as stroke length?

The size of the pushrod

The distance that the pushrod travels into the chamber

The distance that the pushrod travels out of the chamber

The thickness of the pushrod

13 / 30

What links the brake chamber to the brake assembly?

Hinges

The pushrod and brackets

The pushrod and a slack adjuster

Clamps

14 / 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

15 / 30

What do front wheel-limiting valves do?

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

Stop air flow to the front brakes

16 / 30

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

A dual chamber

A service brake chamber

A spring brake chamber

A double chamber

17 / 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

In unison

Simultaneously

Remotely

18 / 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 style of brake chamber

The type of brake chamber

19 / 30

How many kinds of air brake chambers are there?

Three

Four

One

Two

20 / 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

21 / 30

Safety valves normally open at what psi?

175 psi

180 psi

150 psi

120 psi

22 / 30

The pushrod stroke is dependent on what?

The pressure of the compressed air that enters the brake chamber

The manufacturer's design

How hard the brakes are applied

None of the above

23 / 30

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

Yes

Only tractor trailers

Not the older vehicles

Only fire trucks

24 / 30

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

The size of the compressor

All of the above

The vehicle manufacturer

The size of the wet tank

25 / 30

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

Wig wag

Mig mag

Wig mag

Big wag

26 / 30

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

It causes brake failure

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

None of the above

The spring brakes will apply

27 / 30

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

Minimum thrust

Maintenance schedule

Pushrod stroke-adjustment limit

Maximum thrust

28 / 30

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

Forced air

Natural force

The spring inside the chamber

A pulley

29 / 30

What contains the brake drum or disc?

The brake assembly

The shoes

The slack adjusters

The hubs

30 / 30

What is the pushrod stroke dependent on?

The pressure of the compressed air that enters the brake chamber

The size of the pads

The amount of compressed air going through the air hoses

The size of the discs

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Ontario Air Brake Test 03

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