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 indicates that an air compressor drive belt is too loose?

A shiny appearance

No movement at all under pressure

A new belt label

Excessive belt movement when firm hand pressure is applied

2 / 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

Any air line defect

Approved fittings

Properly secured air lines

3 / 25

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

The steering wheel

The exhaust pipe

Wheels, dust shields and other vehicle parts

The fuel tank

4 / 25

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

Clean and dry belt

Loose, cut or frayed belt

Properly tensioned belt

Correctly aligned belt

5 / 25

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

Rust on the wheel rims only

Faded paint on the vehicle body

Dirty interior surfaces

Wear, cuts, abrasion and heat damage

6 / 25

When must air compressors be inspected?

Only when the engine is idling

With the engine stopped

Only when driving

With the engine at full throttle

7 / 25

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

Clean hoses

An audible air leak

Secure line supports

Properly routed lines

8 / 25

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

Support the vehicle frame

Deliver fuel to the engine

Provide air-tight seal and strength through layered construction

Carry engine coolant

9 / 25

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

Excessive tire tread wear

Dirty windshield

Low engine oil level

Cracked or broken brake drums or rotors

10 / 25

Unusual movement of an air tank may indicate:

An insecure air tank or mounting bracket

Correct air pressure

A clean air system

Proper installation

11 / 25

When is an air line considered defective?

When damage extends into the reinforcing or inner layer

When it is properly secured

When it is correctly routed

When it is clean and dry

12 / 25

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

Correct pulley size

Clean pulley surface

Loose air compressor drive belt pulley

Proper pulley alignment

13 / 25

What is required regarding fittings used in air brake systems?

Any plumbing fittings may be used

Tape alone may be used to join lines

Fittings must be specifically designed and approved for air brake use

Garden hose connectors may be used

14 / 25

What must be checked when inspecting air tanks?

The size of the fuel filler neck

The radio antenna mount

That air tanks are securely attached to the vehicle

The colour of the tank

15 / 25

When inspecting air tanks, the driver must check for:

Tank manufacturer logo

Insecure mounting

Number of tanks only

Tank colour

16 / 25

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

They are usually detectable audibly

By tire temperature

By checking fuel consumption

By dashboard warning lights only

17 / 25

How should a driver check the security of air tanks?

By looking at them and attempting to move them

By reading the vehicle manual only

By checking tire pressure

By listening to the radio

18 / 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

19 / 25

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

It improves air flow

It reduces fuel consumption

It increases tire life

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

20 / 25

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

The windshield wipers

The condition and tension of drive pulleys and belt

The colour of the belt

The radio fuse

21 / 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 brake drum or rotor defect

A clean brake drum

22 / 25

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

The compressor paint colour

The brand of the compressor oil

The size of the compressor label

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

23 / 25

A noticeable change in brake behaviour may indicate:

A burned-out headlight

Low power steering fluid

Defective, cracked or broken drums or rotors

A loose mirror

24 / 25

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

Colour coordination with the vehicle

Length of the hose only

Brand name of the hose

Leaks, damage or wear, and improper fittings

25 / 25

Which air tank condition is considered a defect?

Clearly labelled tank

Insecurely mounted air tank

Painted tank surface

Dry tank exterior

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.