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

What are brake stroke indicators generally designed to do?

Show tire temperature

Control engine speed

Become visible when pushrod stroke exceeds the adjustment limit

Measure fuel economy

2 / 40

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

Increase the idle speed

Shut off the engine

Put it in neutral only

Leave it running at high idle

3 / 40

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

The vehicle owner’s supervisor

Anyone trained by the employer informally

Any licensed driver

Only certified technicians

4 / 40

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

The distance from the brake pedal to the floor

The thickness of the brake pad

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

The diameter of the brake drum

5 / 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

6 / 40

Which of the following is a possible brake chamber size?

7 / 40

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

To reduce brake lining material

To eliminate the need for brake inspections

To increase top vehicle speed

To avoid the need for regular manual re-adjustment

8 / 40

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

Square

Star-shaped

Circular

Trapezoidal

9 / 40

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

Covers or housings that conceal the brake linkage

Painted wheel hubs

Lack of a sun visor

Missing radio antenna

10 / 40

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

Install new brake chambers

Re-design the brake system

Re-adjust brakes on vehicles fitted with manual slack adjusters

Repair automatic slack adjusters

11 / 40

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

The brake cools more quickly

The brake is out of adjustment

The brake automatically repairs itself

The brake applies more force

12 / 40

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

Remove dirt, corrosion and paint from the surfaces

Deflate all tires

Replace the air lines

Remove the entire brake chamber

13 / 40

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

A tire pressure gauge

A screwdriver

A standard household tape measure

A special measuring tool designed for brake chambers

14 / 40

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

700 to 800 kPa (100 to 115 psi)

621 to 690 kPa (90 to 100 psi)

200 to 300 kPa (30 to 45 psi)

100 to 200 kPa (15 to 30 psi)

15 / 40

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

They must be fully applied

Their position does not matter

They must be released

They must be caged

16 / 40

What is the most common brake chamber size mentioned?

17 / 40

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

207 kPa (30 psi)

345 kPa (50 psi)

1,034 kPa (150 psi)

621 kPa (90 psi)

18 / 40

How is brake chamber size commonly determined in practice?

By guessing based on vehicle colour

By information from the employer or vehicle owner’s manual

By measuring tire circumference

By counting the number of axles

19 / 40

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

The thickness of the brake pedal

The number of wheel studs

The colour of the air lines

The size and type of each air brake chamber

20 / 40

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

Frequent painting of the indicators

Using them only in winter

Replacing indicators daily

Correct installation, maintenance, and driver training

21 / 40

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

It stays the same

It fluctuates randomly

It decreases

It increases

22 / 40

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

Yes, if supervised by another driver

Yes, if the vehicle is empty

Yes, but only once per month

No, they are not permitted

23 / 40

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

The age of the driver

The body design and suspension of some vehicles

The size of the steering wheel

The colour of the truck cab

24 / 40

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

Only during annual safety inspections

Yes, inspection is still required

No, inspection is no longer required

Only if the vehicle is over 10 years old

25 / 40

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

Add measurement 1 and measurement 2

Subtract measurement 1 from measurement 2

Divide measurement 2 by measurement 1

Multiply measurement 1 by measurement 2

26 / 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

27 / 40

What must the brake pushrod stroke comply with in Ontario?

Vehicle manufacturer’s warranty rules

Ontario Highway Traffic Act and regulations

Federal tax codes

Local zoning bylaws

28 / 40

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

It never varies

By 19 millimetres or more

By exactly 5 millimetres

By 2 millimetres or less

29 / 40

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

Hexagonal ports

Square ports

Triangular ports

Oval ports

30 / 40

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

Driving with low windshield washer fluid

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

Washing vehicles on public roads

Use of two different tire brands on one axle

31 / 40

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

Determine the adjustment limit for that brake chamber

Remove the chamber from the vehicle

Deflate the tires

Increase air pressure above 1,000 kPa

32 / 40

What is the most reliable method for inspecting brake adjustment?

Measuring tire tread depth

Measuring wheel rim diameter

Measuring the applied pushrod stroke

Visually checking air tank size

33 / 40

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

Mark the pushrod

Press and hold the brake pedal

Shut off the engine

Secure the vehicle with wheel chocks or blocks

34 / 40

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

When the applied pushrod stroke exceeds the adjustment limit

When the air line is longer than 2 metres

When the chamber is painted a dark colour

When the vehicle is over 5 years old

35 / 40

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

Remove the brake chamber

Mark the pushrod at the brake chamber or a fixed point

Remove the wheels

Deflate the air tanks completely

36 / 40

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

They will drain the battery

They may overinflate the tires

They will void the radio warranty

They may unknowingly damage the brake and cause it to malfunction

37 / 40

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

Engine idling and service brakes released

Engine off and service brakes released

Engine at high idle and service brakes pumped

Engine shut off and service brakes fully applied

38 / 40

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

The vehicle is overloaded

The automatic slack adjuster is defective

The air compressor is too small

The tires are underinflated

39 / 40

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

Press it halfway only

Pump it rapidly

Release it completely

Press and hold it in the fully applied position

40 / 40

Where can brake stroke indicators be fitted?

Only inside the cab

Only inside the air tank

Only on the tires

To the pushrod or brake linkage with external reference points

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.