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 is required regarding fittings used in air brake systems?

Fittings must be specifically designed and approved for air brake use

Any plumbing fittings may be used

Garden hose connectors may be used

Tape alone may be used to join lines

2 / 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

3 / 25

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

Dirty windshield

Cracked or broken brake drums or rotors

Low engine oil level

Excessive tire tread wear

4 / 25

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

New brake linings

A clean brake drum

A brake drum or rotor defect

Properly adjusted brakes

5 / 25

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

Clean hoses

Secure line supports

Properly routed lines

An audible air leak

6 / 25

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

Correctly aligned belt

Clean and dry belt

Properly tensioned belt

Loose, cut or frayed belt

7 / 25

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

Clean pulley surface

Loose air compressor drive belt pulley

Correct pulley size

Proper pulley alignment

8 / 25

A noticeable change in brake behaviour may indicate:

Defective, cracked or broken drums or rotors

A loose mirror

Low power steering fluid

A burned-out headlight

9 / 25

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

A shiny appearance

No movement at all under pressure

Excessive belt movement when firm hand pressure is applied

A new belt label

10 / 25

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

The fuel tank

The exhaust pipe

The steering wheel

Wheels, dust shields and other vehicle parts

11 / 25

Which air tank condition is considered a defect?

Painted tank surface

Dry tank exterior

Clearly labelled tank

Insecurely mounted air tank

12 / 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 compressor paint colour

The brand of the compressor oil

13 / 25

When inspecting air tanks, the driver must check for:

Number of tanks only

Insecure mounting

Tank colour

Tank manufacturer logo

14 / 25

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

Any air line defect

Properly secured air lines

Approved fittings

Newly installed air lines

15 / 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

16 / 25

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

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

It improves air flow

It increases tire life

It reduces fuel consumption

17 / 25

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

The condition and tension of drive pulleys and belt

The colour of the belt

The windshield wipers

The radio fuse

18 / 25

What must be checked when inspecting air tanks?

That air tanks are securely attached to the vehicle

The colour of the tank

The radio antenna mount

The size of the fuel filler neck

19 / 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

20 / 25

Unusual movement of an air tank may indicate:

A clean air system

Proper installation

Correct air pressure

An insecure air tank or mounting bracket

21 / 25

What mounting condition on an air compressor is considered defective?

Properly torqued bolts

Painted mounting bracket

New fasteners

Insecure air compressor mounting, bracket or fasteners

22 / 25

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

Length of the hose only

Brand name of the hose

Leaks, damage or wear, and improper fittings

Colour coordination with the vehicle

23 / 25

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

Dirty interior surfaces

Wear, cuts, abrasion and heat damage

Rust on the wheel rims only

Faded paint on the vehicle body

24 / 25

When must air compressors be inspected?

With the engine at full throttle

Only when the engine is idling

Only when driving

With the engine stopped

25 / 25

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

Provide air-tight seal and strength through layered construction

Carry engine coolant

Support the vehicle frame

Deliver fuel to the engine

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.