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

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

The condition and tension of drive pulleys and belt

The radio fuse

The colour of the belt

The windshield wipers

2 / 25

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

The compressor paint colour

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

The brand of the compressor oil

The size of the compressor label

3 / 25

What is required regarding fittings used in air brake systems?

Tape alone may be used to join lines

Garden hose connectors may be used

Any plumbing fittings may be used

Fittings must be specifically designed and approved for air brake use

4 / 25

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

Clean hoses

Properly routed lines

Secure line supports

An audible air leak

5 / 25

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

Correctly aligned belt

Clean and dry belt

Loose, cut or frayed belt

Properly tensioned belt

6 / 25

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

Low engine oil level

Excessive tire tread wear

Dirty windshield

Cracked or broken brake drums or rotors

7 / 25

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

A clean brake drum

Properly adjusted brakes

New brake linings

A brake drum or rotor defect

8 / 25

When must air compressors be inspected?

With the engine stopped

Only when the engine is idling

Only when driving

With the engine at full throttle

9 / 25

How should a driver check the security of air tanks?

By reading the vehicle manual only

By looking at them and attempting to move them

By listening to the radio

By checking tire pressure

10 / 25

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

Newly installed air lines

Properly secured air lines

Approved fittings

Any air line defect

11 / 25

What mounting condition on an air compressor is considered defective?

New fasteners

Properly torqued bolts

Painted mounting bracket

Insecure air compressor mounting, bracket or fasteners

12 / 25

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

Support the vehicle frame

Carry engine coolant

Deliver fuel to the engine

Provide air-tight seal and strength through layered construction

13 / 25

Unusual movement of an air tank may indicate:

Proper installation

Correct air pressure

An insecure air tank or mounting bracket

A clean air system

14 / 25

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

It improves air flow

It reduces fuel consumption

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

It increases tire life

15 / 25

What must be checked when inspecting air tanks?

The size of the fuel filler neck

The radio antenna mount

The colour of the tank

That air tanks are securely attached to the vehicle

16 / 25

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

A new belt label

No movement at all under pressure

A shiny appearance

Excessive belt movement when firm hand pressure is applied

17 / 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

Colour coordination with the vehicle

Brand name of the hose

18 / 25

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

The fuel tank

The exhaust pipe

Wheels, dust shields and other vehicle parts

The steering wheel

19 / 25

When is an air line considered defective?

When damage extends into the reinforcing or inner layer

When it is correctly routed

When it is properly secured

When it is clean and dry

20 / 25

A noticeable change in brake behaviour may indicate:

A loose mirror

A burned-out headlight

Defective, cracked or broken drums or rotors

Low power steering fluid

21 / 25

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

Wear, cuts, abrasion and heat damage

Rust on the wheel rims only

Dirty interior surfaces

Faded paint on the vehicle body

22 / 25

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

By checking fuel consumption

They are usually detectable audibly

By dashboard warning lights only

By tire temperature

23 / 25

When inspecting air tanks, the driver must check for:

Tank colour

Insecure mounting

Tank manufacturer logo

Number of tanks only

24 / 25

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

Correct pulley size

Clean pulley surface

Proper pulley alignment

Loose air compressor drive belt pulley

25 / 25

Which air tank condition is considered a defect?

Dry tank exterior

Painted tank surface

Clearly labelled tank

Insecurely mounted air tank

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.