Chapter 11: Inspecting Air Brake Adjustment

An Ontario air brake practice test focusing on the chapter “Inspecting Air Brake Adjustment” is essential for those preparing for the air brake endorsement.

Ontario Air Brake Test - Chapter 11: Inspecting Air Brake Adjustment

1 / 40

In some brake systems, what can make it impossible to inspect brake adjustment using the described techniques?

Missing radio antenna

Covers or housings that conceal the brake linkage

Painted wheel hubs

Lack of a sun visor

2 / 40

In Method 2 of measurement, what is “measurement number 1”?

The distance from the brake pedal to the floor

The distance from a point on the pushrod to a fixed point with brakes released

The diameter of the brake drum

The thickness of the brake pad

3 / 40

After determining the brake chamber’s size and type, what is the next step?

Deflate the tires

Remove the chamber from the vehicle

Increase air pressure above 1,000 kPa

Determine the adjustment limit for that brake chamber

4 / 40

What kind of tool is needed to measure the diameter of brake chambers directly?

A standard household tape measure

A screwdriver

A tire pressure gauge

A special measuring tool designed for brake chambers

5 / 40

What must drivers be able to identify to determine the correct adjustment limit?

The thickness of the brake pedal

The size and type of each air brake chamber

The colour of the air lines

The number of wheel studs

6 / 40

What is the main purpose of automatic slack (brake) adjusters?

To increase top vehicle speed

To avoid the need for regular manual re-adjustment

To eliminate the need for brake inspections

To reduce brake lining material

7 / 40

Where can brake stroke indicators be fitted?

Only inside the cab

Only inside the air tank

To the pushrod or brake linkage with external reference points

Only on the tires

8 / 40

Which of the following is a possible brake chamber size?

9 / 40

During the inspection, within what air pressure range should both primary and secondary tank gauges be set?

621 to 690 kPa (90 to 100 psi)

100 to 200 kPa (15 to 30 psi)

700 to 800 kPa (100 to 115 psi)

200 to 300 kPa (30 to 45 psi)

10 / 40

Long-stroke brake chambers can be identified in part by what feature of the air line ports?

Triangular ports

Oval ports

Hexagonal ports

Square ports

11 / 40

What is the most reliable method for inspecting brake adjustment?

Measuring the applied pushrod stroke

Measuring wheel rim diameter

Visually checking air tank size

Measuring tire tread depth

12 / 40

Compared to standard brake chambers, how much can the specified brake adjustment limit vary for long-stroke chambers?

By exactly 5 millimetres

It never varies

By 2 millimetres or less

By 19 millimetres or more

13 / 40

Why is it dangerous for someone who is not certified to attempt to adjust automatic slack adjusters?

They may unknowingly damage the brake and cause it to malfunction

They may overinflate the tires

They will drain the battery

They will void the radio warranty

14 / 40

What is the most common brake chamber size mentioned?

15 / 40

If periodic re-adjustments are required on automatic slack adjusters, what does this indicate?

The air compressor is too small

The tires are underinflated

The vehicle is overloaded

The automatic slack adjuster is defective

16 / 40

Must brake adjustment still be inspected if a vehicle has automatic slack adjusters?

Only during annual safety inspections

No, inspection is no longer required

Yes, inspection is still required

Only if the vehicle is over 10 years old

17 / 40

In Method 1 of measurement, what is done before applying the brakes?

Remove the wheels

Remove the brake chamber

Deflate the air tanks completely

Mark the pushrod at the brake chamber or a fixed point

18 / 40

What is the first step in the procedure for measuring applied pushrod stroke?

Press and hold the brake pedal

Shut off the engine

Mark the pushrod

Secure the vehicle with wheel chocks or blocks

19 / 40

When measuring applied pushrod stroke, what must be done with the spring brakes?

They must be released

Their position does not matter

They must be caged

They must be fully applied

20 / 40

What should be done with the engine before actually measuring pushrod stroke?

Put it in neutral only

Leave it running at high idle

Increase the idle speed

Shut off the engine

21 / 40

Why must brake adjustment be inspected regularly?

To meet insurance premium requirements only

To reduce fuel consumption

To extend tire life only

To ensure proper brake function and safety

22 / 40

What does the Ontario Highway Traffic Act and regulations prohibit regarding brake adjustment?

Operation of a vehicle with a brake that is out of adjustment

Use of two different tire brands on one axle

Washing vehicles on public roads

Driving with low windshield washer fluid

23 / 40

Before inspecting brake adjustment, what must the air pressure be raised above?

207 kPa (30 psi)

1,034 kPa (150 psi)

345 kPa (50 psi)

621 kPa (90 psi)

24 / 40

When inspecting brake adjustment at each wheel, what must be the status of the engine and service brakes?

Engine at high idle and service brakes pumped

Engine shut off and service brakes fully applied

Engine idling and service brakes released

Engine off and service brakes released

25 / 40

To obtain the applied pushrod stroke using Method 2, what must be done with the two measurements?

Multiply measurement 1 by measurement 2

Divide measurement 2 by measurement 1

Subtract measurement 1 from measurement 2

Add measurement 1 and measurement 2

26 / 40

What may limit safe access to certain brake components during inspection?

The age of the driver

The colour of the truck cab

The size of the steering wheel

The body design and suspension of some vehicles

27 / 40

Before relying on brake chamber markings, what may be necessary to see them clearly?

Remove dirt, corrosion and paint from the surfaces

Replace the air lines

Deflate all tires

Remove the entire brake chamber

28 / 40

When is a brake identified as defective in this inspection method?

When the air line is longer than 2 metres

When the vehicle is over 5 years old

When the chamber is painted a dark colour

When the applied pushrod stroke exceeds the adjustment limit

29 / 40

What shape is the tag under the clamp bolt on many long-stroke brake chambers?

Circular

Trapezoidal

Star-shaped

Square

30 / 40

When actually measuring the applied stroke, what must the driver do with the service brake pedal?

Release it completely

Press it halfway only

Pump it rapidly

Press and hold it in the fully applied position

31 / 40

How is brake chamber size commonly determined in practice?

By measuring tire circumference

By information from the employer or vehicle owner’s manual

By counting the number of axles

By guessing based on vehicle colour

32 / 40

Are drivers with an air-brake adjustment certificate permitted to manually re-adjust automatic slack adjusters?

Yes, if the vehicle is empty

Yes, if supervised by another driver

Yes, but only once per month

No, they are not permitted

33 / 40

Who may repair and perform brake re-adjustments on manual slack adjusters in Ontario?

Any garage worker

Only certified technicians or drivers with a valid air-brake adjustment certificate

Any driver with a full licence

The vehicle owner, regardless of training

34 / 40

What must the brake pushrod stroke comply with in Ontario?

Ontario Highway Traffic Act and regulations

Vehicle manufacturer’s warranty rules

Local zoning bylaws

Federal tax codes

35 / 40

What is necessary to ensure reliable results when using brake-stroke indicators?

Correct installation, maintenance, and driver training

Frequent painting of the indicators

Replacing indicators daily

Using them only in winter

36 / 40

What happens when the brake pushrod stroke exceeds the adjustment limit?

The brake is out of adjustment

The brake automatically repairs itself

The brake cools more quickly

The brake applies more force

37 / 40

What does an Ontario air-brake adjustment certificate allow a driver to do?

Re-adjust brakes on vehicles fitted with manual slack adjusters

Install new brake chambers

Re-design the brake system

Repair automatic slack adjusters

38 / 40

Who is permitted to perform re-adjustments or repairs on automatic slack adjusters?

The vehicle owner’s supervisor

Any licensed driver

Only certified technicians

Anyone trained by the employer informally

39 / 40

As brakes wear, what happens to the brake pushrod stroke?

It stays the same

It fluctuates randomly

It decreases

It increases

40 / 40

What are brake stroke indicators generally designed to do?

Control engine speed

Measure fuel economy

Show tire temperature

Become visible when pushrod stroke exceeds the adjustment limit

Your score is

This section tests knowledge of proper brake adjustment procedures, including checking slack adjuster movement and ensuring brake components are within legal limits. Practice questions help drivers understand how to identify and correct improper adjustments, which are critical for safe and effective braking. Regularly using these practice tests enables learners to build confidence, reinforce inspection techniques, and meet Ontario’s safety standards. Mastering brake adjustment inspections is key to passing the official test and ensuring safe vehicle operation.