Ontario Air Brake Test 08

As a potential commercial driver in Ontario, it is important to demonstrate proficiency in air brake systems before getting behind the wheel. The Ontario air brake practice test is an invaluable resource in preparing for the required written examination. The test evaluates a candidate’s knowledge of air brake systems, including mechanics, components, and operation. The test also covers safety rules and regulations regarding air brake systems. Taking the practice test is a great way to identify gaps in knowledge and build the skills necessary to succeed on the real examination. With the right preparation and study, passing the Ontario air brake test can unlock exciting new career opportunities and lead to a rewarding career as a commercial driver.

1 / 30

Which statement is false? Long-stroke brake chambers can be identified by the following visible characteristics...

A trapezoidal tag is placed under the clamp bolt that indicates the brake chamber's maximum stroke dimension

Markings are placed on the brake chamber body to indicate that it is a long-stroke brake chamber, and only long-stroke diaphragms are to be used as replacements

The air lines attach to a square port in the brake chamber body

The air hoses thin out as they approach the brake chamber

2 / 30

Who should repair and perform brake re-adjustments on manual slack adjusters?

Vehicle owners

Certified technicians

Carriers

Drivers

3 / 30

How many methods are available to measure applied pushrod stroke?

Two

One

Four

Three

4 / 30

The type of brake chamber also affects the specified brake adjustment limit, which can vary by how many millimetres between standard and long-stroke brake chambers?

15 millimetres

12 millimetres

19 millimetres

10 millimetres

5 / 30

Brake chamber pushrods are generally marked with what?

Some type of indicator that becomes visible when pushrod stroke exceeds the adjustment limit

Markings on the wall of the housing

Grooves along the pushrod

None of the above

6 / 30

Which statement is false? While inspecting brake adjustment, mark the pushrod at the brake chamber or a suitable fixed reference point with what?

Chalk

Carpenter pencil

Soapstone

Marker

7 / 30

Each air brake chamber's pushrod stroke must not exceed...

The size of the brake chamber

It's capabilities

The specified adjustment limits

The length of the pushrod

8 / 30

When testing the tractor (towing vehicle) protection valve, you should note whether the air exhausts from where?

The foot valve

The two-way valve

The trailer service-line coupler

The brake chamber ports

9 / 30

The most common brake chamber size is...

10 / 30

When inspecting the air-tank drain valves, you should drain the supply tank until what happens?

All of the above

All of the moisture is discharged

Only sludge is visible

It discharges only clean air

11 / 30

The most visible and permanent of the markings used to identify long-stroke brake chambers are...

The circular ports

The hexagon ports

The square ports

The round ports

12 / 30

While inspecting brake adjustment, the pushrod marks must be...

Approximate

Narrow and precise

Thick

With an arrow

13 / 30

Automatic slack or brake adjusters are used for...

All of the above

Saving the driver time during inspections

Saving wear on the brake chambers

Avoiding the need to regularly perform manual brake re-adjustment

14 / 30

Which statement is false? If you are performing a brake-inspection inspection as part of a practical examination, you must know your vehicle's brake chamber size and type and bring the following items...

A chart of adjustment limits

A means of measuring the applied pushrod stroke

A means of applying the spring brakes

A means of marking the pushrod if this method will be used

15 / 30

What happens when brakes with manual slack adjusters are out of adjustment?

They must be re-adjusted so that the pushrod stroke is less than the adjustment limit

The rotors must also be inspected

All of the above

The vehicle is placed out-of-service until adjustments are made

16 / 30

While inspecting the vehicle, why should you park on level ground?

It will reduce the possibility of unexpected vehicle movement

It will give you the best view while inspecting it

All of the above

It will give proper readings while inspecting the vehicle

17 / 30

When testing the low-air warning device, how often should you press and release the brake pedal?

once and hold it down

you don't

several times until the low-air warning device activates

twice and then leave it and watch

18 / 30

The vehicle fails the air-tank drain valves test when...

Any drain valve is missing

All of the above

Any drain valve looks different

Any drain valve fails to function properly

19 / 30

What does an air dryer purge also signal?

All of the above

Low air pressure

Compressor cut-out

A malfunction

20 / 30

What happens to the brake pushrod stroke as the brakes wear?

Nothing happens

The reduces

It must be replaced

It increases

21 / 30

When testing air-loss rate, why should you disregard the initial pressure drop?

To ensure the pressure has stabilized

It's not compressed air

It's free play

It has moisture in it

22 / 30

Which statement is false? Some body design and suspension of some vehicles may limit safe access to the air tanks and drains unless...

The vehicle is supported on a hoist

The vehicle is over a pit

The vehicle is on a ramp

The driver crawls on a creeper

23 / 30

Can brake-stroke indicators be fitted to the brake linkage?

Only with fire trucks

On older vehicles only

Yes

24 / 30

Since adjustment limits vary depending on the size and type of air brake chamber, what must you be able to identify?

The slack adjuster being used

The type of pushrod being used

The particular brake chamber in use

The size of clevis pin being used

25 / 30

Which statement is false? Inspect brake chambers at each wheel for...

Cracks and non-manufactured holes

Mismatched air brake chamber size on a steering axle

Visual air leaks

Mismatched slack-adjuster length on a steering axle

26 / 30

What would happen to the vehicle if the driver were operating a vehicle with defects or failing to conduct the required inspections?

Impoundment of the vehicle

Ticketed

None of the above

The safety certificate is removed

27 / 30

Which of the following is not a required step for testing the air-tank drain valves?

Ensure that the air brake system is below its normal operating pressure range

Locate and drain the remaining air tanks

Watch the discharge from each air-tank and ensure that all air-tank drain valves function properly

Locate and drain the supply tank until the valve discharges only clean air

28 / 30

Brake wear occurs at varying rates, depending on what?

The manufacturer's recommendations

All of the above

The age of the brakes

The type of vehicle and driving conditions

29 / 30

When testing the tractor (towing vehicle) protection valve and are concerned that the vehicle has no anti-compounding valve, what should you do?

None of the above

Ensure the vehicle is secure and release the spring brakes before applying service brakes

Apply the spring brakes first

Re-check to ensure you do

30 / 30

When testing automatic application of the trailer spring brakes and uncertain that the trailer spring brakes have applied, what should you do?

Shift to a low gear

Turn off the engine

Gently add engine power to confirm brake application

Gently reduce engine power to confirm brake application

Your score is

Ontario Air Brake Test 08

About

Practice Tests

Getting a License

Get In Touch