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...

Cracks and non-manufactured holes

Mismatched slack-adjuster length on a steering axle

Mismatched air brake chamber size on a steering axle

Visual air leaks

2 / 30

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

Any drain valve looks different

All of the above

Any drain valve fails to function properly

Any drain valve is missing

3 / 30

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

Approximate

Thick

With an arrow

Narrow and precise

4 / 30

Brake chamber pushrods are generally marked with what?

None of the above

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

Grooves along the pushrod

Markings on the wall of the housing

5 / 30

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

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

All of the above

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

The rotors must also be inspected

6 / 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

Shift to a low gear

Turn off the engine

Gently reduce engine power to confirm brake application

7 / 30

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

Only with fire trucks

Yes

On older vehicles only

8 / 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

9 / 30

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

It's free play

To ensure the pressure has stabilized

It's not compressed air

It has moisture in it

10 / 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

11 / 30

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

Nothing happens

The reduces

It increases

It must be replaced

12 / 30

How many methods are available to measure applied pushrod stroke?

One

Two

Four

Three

13 / 30

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

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

Locate and drain the remaining air tanks

14 / 30

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

Certified technicians

Drivers

Carriers

Vehicle owners

15 / 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

19 millimetres

10 millimetres

12 millimetres

16 / 30

What does an air dryer purge also signal?

All of the above

A malfunction

Low air pressure

Compressor cut-out

17 / 30

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

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

None of the above

18 / 30

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

It will give proper readings while inspecting the vehicle

It will reduce the possibility of unexpected vehicle movement

It will give you the best view while inspecting it

All of the above

19 / 30

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

The size of clevis pin being used

The slack adjuster being used

The type of pushrod being used

The particular brake chamber in use

20 / 30

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

The hexagon ports

The round ports

The square ports

The circular ports

21 / 30

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

It's capabilities

The specified adjustment limits

The size of the brake chamber

The length of the pushrod

22 / 30

The most common brake chamber size is...

23 / 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

Carpenter pencil

Soapstone

Chalk

24 / 30

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

several times until the low-air warning device activates

once and hold it down

twice and then leave it and watch

you don't

25 / 30

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

None of the above

Ticketed

Impoundment of the vehicle

The safety certificate is removed

26 / 30

Automatic slack or brake adjusters are used for...

Saving the driver time during inspections

All of the above

Avoiding the need to regularly perform manual brake re-adjustment

Saving wear on the brake chambers

27 / 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

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

The air hoses thin out as they approach the brake chamber

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

28 / 30

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

All of the moisture is discharged

It discharges only clean air

All of the above

Only sludge is visible

29 / 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 marking the pushrod if this method will be used

A means of applying the spring brakes

A means of measuring the applied pushrod stroke

A chart of adjustment limits

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 driver crawls on a creeper

The vehicle is on a ramp

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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