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 contains the brake drum or disc?

The hubs

The brake assembly

The slack adjusters

The shoes

2 / 30

What is referred to as pushrod stroke length?

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

The size of the pushrod

3 / 30

Air pressure gauges indicate air pressure in which air tanks?

The wet tank

All of the tanks

Dual tanks

Service tank

4 / 30

What is the pushrod stroke dependent on?

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

The size of the pads

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

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

Maximum thrust

Maintenance schedule

Pushrod stroke-adjustment limit

Minimum thrust

7 / 30

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

A double chamber

A service brake chamber

A dual chamber

A spring brake chamber

8 / 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

Simultaneously

Remotely

Separately

9 / 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

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

Stabilize the pressure so it is equal in all wheels

10 / 30

Safety valves normally open at what psi?

175 psi

180 psi

150 psi

120 psi

11 / 30

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

Only tractor trailers

Only fire trucks

Not the older vehicles

Yes

12 / 30

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

Clamps the discs to the rotors

Provides enough force to hold the brakes in the applied position

Pushes the brake shoes onto the drums

None of the above

13 / 30

What links the brake chamber to the brake assembly?

Clamps

Hinges

The pushrod and a slack adjuster

The pushrod and brackets

14 / 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

15 / 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

16 / 30

The pushrod stroke is dependent on what?

The manufacturer's design

How hard the brakes are applied

None of the above

The pressure of the compressed air that enters the brake chamber

17 / 30

How many kinds of air brake chambers are there?

Three

Four

Two

One

18 / 30

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

35 psi

55 psi

65 psi

45 psi

19 / 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 warning buzzer

A bell

An alarm

20 / 30

How are spring brakes applied?

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

None of the above

21 / 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 bushing

None of the above

A pushrod

22 / 30

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

Certified technicians

Drivers

Vehicle owners

All of the above

23 / 30

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

A diagram

A puck

A diaphragm

A stopper

24 / 30

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

The spring brakes will apply

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

It causes brake failure

None of the above

25 / 30

What is referred to as stroke length?

The distance that the pushrod travels out of the chamber

The distance that the pushrod travels into the chamber

The thickness of the pushrod

The size of the pushrod

26 / 30

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

Wig wag

Big wag

Mig mag

Wig mag

27 / 30

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

Yes, but only within city limits

Yes

Only when directed by a qualified technician

28 / 30

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

Dirt

Moisture

Oil

Metal fragments

29 / 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 type of brake chamber

The style of brake chamber

The material the brake chamber is made of

30 / 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

Air-dryer exhaust port

Exhaust ports of brake valves

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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