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? Inspect brake chambers at each wheel for...

Mismatched air brake chamber size on a steering axle

Visual air leaks

Mismatched slack-adjuster length on a steering axle

Cracks and non-manufactured holes

2 / 30

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

The square ports

The hexagon ports

The round ports

The circular ports

3 / 30

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

The size of the brake chamber

The length of the pushrod

The specified adjustment limits

It's capabilities

4 / 30

Brake wear occurs at varying rates, depending on what?

All of the above

The manufacturer's recommendations

The age of the brakes

The type of vehicle and driving conditions

5 / 30

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

The type of pushrod being used

The slack adjuster being used

The particular brake chamber in use

The size of clevis pin being used

6 / 30

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

Only with fire trucks

Yes

On older vehicles only

7 / 30

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

All of the above

Any drain valve is missing

Any drain valve fails to function properly

Any drain valve looks different

8 / 30

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

Carriers

Certified technicians

Drivers

Vehicle owners

9 / 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

10 / 30

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

It has moisture in it

It's free play

It's not compressed air

To ensure the pressure has stabilized

11 / 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

None of the above

The safety certificate is removed

Ticketed

12 / 30

What does an air dryer purge also signal?

Low air pressure

A malfunction

Compressor cut-out

All of the above

13 / 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 means of applying the spring brakes

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

A means of measuring the applied pushrod stroke

A chart of adjustment limits

14 / 30

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

It discharges only clean air

Only sludge is visible

All of the moisture is discharged

All of the above

15 / 30

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

you don't

twice and then leave it and watch

several times until the low-air warning device activates

once and hold it down

16 / 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

17 / 30

The most common brake chamber size is...

18 / 30

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

All of the above

The rotors must also be inspected

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

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

19 / 30

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

Re-check to ensure 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

20 / 30

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

The reduces

It must be replaced

Nothing happens

It increases

21 / 30

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

Gently add engine power to confirm brake application

Gently reduce engine power to confirm brake application

Turn off the engine

Shift to a low gear

22 / 30

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

Marker

Chalk

Soapstone

Carpenter pencil

23 / 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

It will give proper readings while inspecting the vehicle

All of the above

24 / 30

How many methods are available to measure applied pushrod stroke?

Two

Three

One

Four

25 / 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?

12 millimetres

15 millimetres

10 millimetres

19 millimetres

26 / 30

Brake chamber pushrods are generally marked with what?

None of the above

Markings on the wall of the housing

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

Grooves along the pushrod

27 / 30

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

Locate and drain the remaining air tanks

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

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

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

28 / 30

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

Approximate

Thick

Narrow and precise

With an arrow

29 / 30

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

The foot valve

The brake chamber ports

The trailer service-line coupler

The two-way valve

30 / 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 on a ramp

The driver crawls on a creeper

The vehicle is over a pit

The vehicle is supported on a hoist

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Ontario Air Brake Test 08

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