Chapter 9b: Inspecting Air Brake Components

A free Ontario air brake practice test focusing on the chapter “Inspecting Air Brake Components” is an invaluable resource for new drivers and commercial vehicle operators.

Ontario Air Brake Test - Chapter 9b: Inspecting Air Brake Components

1 / 25

What may obstruct your view of brake drums and rotors during an inspection?

Wheels, dust shields and other vehicle parts

The fuel tank

The exhaust pipe

The steering wheel

2 / 25

What mounting condition on an air compressor is considered defective?

Painted mounting bracket

New fasteners

Properly torqued bolts

Insecure air compressor mounting, bracket or fasteners

3 / 25

When inspecting brake drums and rotors, what must the driver look for?

Cracked or broken brake drums or rotors

Excessive tire tread wear

Dirty windshield

Low engine oil level

4 / 25

If a compressor is belt-driven, what should be inspected?

The colour of the belt

The radio fuse

The windshield wipers

The condition and tension of drive pulleys and belt

5 / 25

The Ontario Highway Traffic Act prohibits the operation of a vehicle on the road or highway with what kind of air line condition?

Properly secured air lines

Approved fittings

Newly installed air lines

Any air line defect

6 / 25

What types of damage or deterioration may occur to brake hoses and tubes?

Dirty interior surfaces

Faded paint on the vehicle body

Wear, cuts, abrasion and heat damage

Rust on the wheel rims only

7 / 25

When inspecting air tanks, the driver must check for:

Tank colour

Insecure mounting

Number of tanks only

Tank manufacturer logo

8 / 25

When inspecting air brake hoses and tubes that make up the air lines, the driver must check for:

Leaks, damage or wear, and improper fittings

Brand name of the hose

Colour coordination with the vehicle

Length of the hose only

9 / 25

Which of the following is a defect when inspecting a vehicle’s air lines?

Secure line supports

An audible air leak

Properly routed lines

Clean hoses

10 / 25

How are air leaks from brake hoses and tubes usually detected?

By checking fuel consumption

By tire temperature

By dashboard warning lights only

They are usually detectable audibly

11 / 25

The Ontario Highway Traffic Act prohibits operating a vehicle on the road or highway with which of the following brake conditions?

Properly adjusted brakes

A brake drum or rotor defect

New brake linings

A clean brake drum

12 / 25

Unusual movement of an air tank may indicate:

A clean air system

Correct air pressure

Proper installation

An insecure air tank or mounting bracket

13 / 25

What must be checked when inspecting air tanks?

The colour of the tank

That air tanks are securely attached to the vehicle

The radio antenna mount

The size of the fuel filler neck

14 / 25

A noticeable change in brake behaviour may indicate:

A loose mirror

A burned-out headlight

Low power steering fluid

Defective, cracked or broken drums or rotors

15 / 25

What are brake hoses and tubes designed to do in an air brake system?

Carry engine coolant

Support the vehicle frame

Provide air-tight seal and strength through layered construction

Deliver fuel to the engine

16 / 25

Which air tank condition is considered a defect?

Dry tank exterior

Clearly labelled tank

Painted tank surface

Insecurely mounted air tank

17 / 25

When must air compressors be inspected?

With the engine stopped

Only when driving

With the engine at full throttle

Only when the engine is idling

18 / 25

What indicates that an air compressor drive belt is too loose?

No movement at all under pressure

A new belt label

Excessive belt movement when firm hand pressure is applied

A shiny appearance

19 / 25

Which belt condition is considered a defect on an air compressor?

Correctly aligned belt

Properly tensioned belt

Loose, cut or frayed belt

Clean and dry belt

20 / 25

How should a driver check the security of air tanks?

By reading the vehicle manual only

By listening to the radio

By checking tire pressure

By looking at them and attempting to move them

21 / 25

Damage to the outer layer of an air line is a concern because:

It reduces fuel consumption

It improves air flow

It increases tire life

It can lead to holes in the inner layers and cause an air leak

22 / 25

When is an air line considered defective?

When it is properly secured

When it is clean and dry

When damage extends into the reinforcing or inner layer

When it is correctly routed

23 / 25

When inspecting the air compressor, the driver must check for which of the following?

The size of the compressor label

A loose, frayed or cut drive belt and insecure mounting bracket or fasteners

The brand of the compressor oil

The compressor paint colour

24 / 25

What is required regarding fittings used in air brake systems?

Garden hose connectors may be used

Fittings must be specifically designed and approved for air brake use

Tape alone may be used to join lines

Any plumbing fittings may be used

25 / 25

Which of the following is a defect related to the air compressor drive?

Proper pulley alignment

Correct pulley size

Loose air compressor drive belt pulley

Clean pulley surface

Your score is

This practice test covers key areas, including inspecting air lines for leaks, checking brake chambers and slack adjusters, and ensuring brake shoes are in good condition. By taking practice tests, candidates can familiarize themselves with key inspection steps and common questions on the official exam. Regular practice builds confidence and reinforces knowledge, helping users identify weaknesses in their understanding. Ultimately, these free tests are essential tools for preparing to operate air brake systems safely.