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?

Painted wheel hubs

Lack of a sun visor

Covers or housings that conceal the brake linkage

Missing radio antenna

2 / 40

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

Engine shut off and service brakes fully applied

Engine at high idle and service brakes pumped

Engine off and service brakes released

Engine idling and service brakes released

3 / 40

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

Multiply measurement 1 by measurement 2

Add measurement 1 and measurement 2

Divide measurement 2 by measurement 1

Subtract measurement 1 from measurement 2

4 / 40

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

To avoid the need for regular manual re-adjustment

To reduce brake lining material

To eliminate the need for brake inspections

To increase top vehicle speed

5 / 40

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

When the air line is longer than 2 metres

When the applied pushrod stroke exceeds the adjustment limit

When the vehicle is over 5 years old

When the chamber is painted a dark colour

6 / 40

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

A special measuring tool designed for brake chambers

A standard household tape measure

A screwdriver

A tire pressure gauge

7 / 40

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

Replacing indicators daily

Frequent painting of the indicators

Correct installation, maintenance, and driver training

Using them only in winter

8 / 40

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

Remove the entire brake chamber

Remove dirt, corrosion and paint from the surfaces

Deflate all tires

Replace the air lines

9 / 40

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

Oval ports

Hexagonal ports

Triangular ports

Square ports

10 / 40

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

Deflate the tires

Determine the adjustment limit for that brake chamber

Increase air pressure above 1,000 kPa

Remove the chamber from the vehicle

11 / 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

Driving with low windshield washer fluid

Use of two different tire brands on one axle

Washing vehicles on public roads

12 / 40

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

Press and hold it in the fully applied position

Pump it rapidly

Press it halfway only

Release it completely

13 / 40

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

Yes, if supervised by another driver

No, they are not permitted

Yes, but only once per month

Yes, if the vehicle is empty

14 / 40

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

It increases

It stays the same

It fluctuates randomly

It decreases

15 / 40

What must the brake pushrod stroke comply with in Ontario?

Ontario Highway Traffic Act and regulations

Vehicle manufacturer’s warranty rules

Federal tax codes

Local zoning bylaws

16 / 40

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

Circular

Star-shaped

Trapezoidal

Square

17 / 40

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

Anyone trained by the employer informally

The vehicle owner’s supervisor

Only certified technicians

Any licensed driver

18 / 40

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

The vehicle owner, regardless of training

Any driver with a full licence

Any garage worker

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

19 / 40

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

Increase the idle speed

Put it in neutral only

Leave it running at high idle

Shut off the engine

20 / 40

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

Yes, inspection is still required

Only during annual safety inspections

No, inspection is no longer required

Only if the vehicle is over 10 years old

21 / 40

Why must brake adjustment be inspected regularly?

To reduce fuel consumption

To meet insurance premium requirements only

To extend tire life only

To ensure proper brake function and safety

22 / 40

What is the most reliable method for inspecting brake adjustment?

Measuring the applied pushrod stroke

Visually checking air tank size

Measuring wheel rim diameter

Measuring tire tread depth

23 / 40

How is brake chamber size commonly determined in practice?

By measuring tire circumference

By counting the number of axles

By guessing based on vehicle colour

By information from the employer or vehicle owner’s manual

24 / 40

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

The age of the driver

The size of the steering wheel

The colour of the truck cab

The body design and suspension of some vehicles

25 / 40

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

The colour of the air lines

The thickness of the brake pedal

The number of wheel studs

The size and type of each air brake chamber

26 / 40

Which of the following is a possible brake chamber size?

27 / 40

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

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

The distance from the brake pedal to the floor

The diameter of the brake drum

The thickness of the brake pad

28 / 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)

200 to 300 kPa (30 to 45 psi)

100 to 200 kPa (15 to 30 psi)

700 to 800 kPa (100 to 115 psi)

29 / 40

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

Secure the vehicle with wheel chocks or blocks

Mark the pushrod

Press and hold the brake pedal

Shut off the engine

30 / 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 automatic slack adjuster is defective

The vehicle is overloaded

31 / 40

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

Repair automatic slack adjusters

Install new brake chambers

Re-design the brake system

Re-adjust brakes on vehicles fitted with manual slack adjusters

32 / 40

What are brake stroke indicators generally designed to do?

Measure fuel economy

Control engine speed

Show tire temperature

Become visible when pushrod stroke exceeds the adjustment limit

33 / 40

Where can brake stroke indicators be fitted?

Only on the tires

Only inside the cab

To the pushrod or brake linkage with external reference points

Only inside the air tank

34 / 40

What is the most common brake chamber size mentioned?

35 / 40

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

The brake cools more quickly

The brake applies more force

The brake automatically repairs itself

The brake is out of adjustment

36 / 40

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

By exactly 5 millimetres

By 2 millimetres or less

By 19 millimetres or more

It never varies

37 / 40

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

Remove the wheels

Deflate the air tanks completely

Mark the pushrod at the brake chamber or a fixed point

Remove the brake chamber

38 / 40

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

1,034 kPa (150 psi)

621 kPa (90 psi)

345 kPa (50 psi)

207 kPa (30 psi)

39 / 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

40 / 40

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

They must be caged

Their position does not matter

They must be released

They must be fully applied

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.