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

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

Cracked or broken brake drums or rotors

Low engine oil level

Excessive tire tread wear

Dirty windshield

2 / 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

New brake linings

A clean brake drum

A brake drum or rotor defect

3 / 25

What mounting condition on an air compressor is considered defective?

Insecure air compressor mounting, bracket or fasteners

Properly torqued bolts

Painted mounting bracket

New fasteners

4 / 25

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

Wheels, dust shields and other vehicle parts

The exhaust pipe

The fuel tank

The steering wheel

5 / 25

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

Deliver fuel to the engine

Provide air-tight seal and strength through layered construction

Support the vehicle frame

Carry engine coolant

6 / 25

What is required regarding fittings used in air brake systems?

Fittings must be specifically designed and approved for air brake use

Garden hose connectors may be used

Any plumbing fittings may be used

Tape alone may be used to join lines

7 / 25

How should a driver check the security of air tanks?

By checking tire pressure

By looking at them and attempting to move them

By reading the vehicle manual only

By listening to the radio

8 / 25

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

It increases tire life

It improves air flow

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

It reduces fuel consumption

9 / 25

What must be checked when inspecting air tanks?

The colour of the tank

The radio antenna mount

The size of the fuel filler neck

That air tanks are securely attached to the vehicle

10 / 25

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

Rust on the wheel rims only

Dirty interior surfaces

Faded paint on the vehicle body

Wear, cuts, abrasion and heat damage

11 / 25

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

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

The size of the compressor label

The brand of the compressor oil

The compressor paint colour

12 / 25

Unusual movement of an air tank may indicate:

An insecure air tank or mounting bracket

Proper installation

Correct air pressure

A clean air system

13 / 25

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

Correctly aligned belt

Properly tensioned belt

Clean and dry belt

Loose, cut or frayed belt

14 / 25

Which air tank condition is considered a defect?

Painted tank surface

Dry tank exterior

Insecurely mounted air tank

Clearly labelled tank

15 / 25

When inspecting air tanks, the driver must check for:

Number of tanks only

Tank colour

Insecure mounting

Tank manufacturer logo

16 / 25

A noticeable change in brake behaviour may indicate:

A burned-out headlight

Defective, cracked or broken drums or rotors

A loose mirror

Low power steering fluid

17 / 25

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

The radio fuse

The condition and tension of drive pulleys and belt

The colour of the belt

The windshield wipers

18 / 25

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

Length of the hose only

Leaks, damage or wear, and improper fittings

Brand name of the hose

Colour coordination with the vehicle

19 / 25

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

Excessive belt movement when firm hand pressure is applied

A shiny appearance

No movement at all under pressure

A new belt label

20 / 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

Newly installed air lines

Approved fittings

Any air line defect

21 / 25

When must air compressors be inspected?

With the engine at full throttle

With the engine stopped

Only when the engine is idling

Only when driving

22 / 25

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

Loose air compressor drive belt pulley

Clean pulley surface

Correct pulley size

Proper pulley alignment

23 / 25

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

By dashboard warning lights only

By checking fuel consumption

They are usually detectable audibly

By tire temperature

24 / 25

When is an air line considered defective?

When it is clean and dry

When damage extends into the reinforcing or inner layer

When it is correctly routed

When it is properly secured

25 / 25

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

Secure line supports

An audible air leak

Clean hoses

Properly routed lines

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.