ICBC Class 3 knowledge practice test - ICBC Knowledge Test Practice

Gearing Up: Your Step-by-Step Guide to Successfully Passing the ICBC Class 3 Knowledge Test in BC
If you want to drive large trucks like dump trucks, tow trucks, or any other two or more axle vehicles in British Columbia, you need to obtain your Class 3 driver’s licence. It begins by passing the ICBC Class 3 Knowledge Test. It is the assurance that you have the necessary knowledge about the rules and safety protocols to operate the heavy commercial trucks.

Let’s Get Started

ICBC class 3 practice test

1 / 25

A restricted view to the side of your vehicle is called:

A shadow area

A blind spot

A no-visibility zone

An excluded vision area

2 / 25

When checking air brake system for leaks, the maximum allowable air loss rate is:

1 psi per minute

2 psi per minute

3 psi per minute

4 psi per minute

3 / 25

What should you check when inspecting brake drums?

Brake fluid levels

Cracks or heat spots

Antifreeze concentration

Suspension component wear

4 / 25

When driving a truck with air brakes, brake fade is most likely to occur when:

Driving at constant speed

Climbing steep grades

Descending long grades

Driving on flat terrain

5 / 25

The minimum stopping distance for a heavy vehicle compared to a car is:

About the same

Twice as long

Three times as long

Four times as long

6 / 25

To prevent the truck from rolling back when starting uphill:

Apply service brakes only

Use hand brake and clutch coordination

Shift directly to second gear

Rev engine before releasing clutch

7 / 25

What document shows the origin and destination of goods?

Bill of lading

Driver's license

Pre-trip inspection report

Insurance certificate

8 / 25

The air pressure in a truck's tanks should build from 85 to 100 psi within:

45 seconds

2 minutes

5 minutes

10 minutes

9 / 25

When driving through a curve with a truck:

Accelerate throughout the curve

Brake firmly in the middle

Slow down before entering

Change lanes during the curve

10 / 25

A Class 3 driver can legally operate:

A vehicle with air brakes

A school bus with passengers

A motorcycle with passengers

A vehicle requiring Class 1 license

11 / 25

The term "off-track" in commercial driving refers to:

Driving away from designated routes

The path difference between front and rear wheels

Driving on unpaved surfaces

Exceeding trip meter readings

12 / 25

What should a driver check before entering a weigh scale?

Vehicle registration only

Axle weights and load security

Only the gross vehicle weight

Fuel levels and trip permits

13 / 25

The maximum blood alcohol concentration for commercial drivers is:

0.08%

0.05%

0.04%

0.00%

14 / 25

When coupling a tractor to a semi-trailer, you should:

Back under the trailer at normal speed

Check that the kingpin is aligned

Connect gladhands before coupling

Apply trailer brakes after coupling

15 / 25

Air brake systems require a warning device that activates at:

80 psi

70 psi

60 psi

50 psi

16 / 25

In poor weather conditions, you should:

Increase your following distance

Maintain normal following distance

Drive faster to avoid delays

Brake harder when stopping

17 / 25

The required minimum tread depth for front tires on commercial vehicles is:

2/32 inch

4/32 inch

6/32 inch

8/32 inch

18 / 25

When transporting a load, the driver is responsible for:

Manufacturing the goods being transported

Securing the cargo properly

Selling the goods at destination

Determining the cargo's market value

19 / 25

Which of these is NOT a proper coupling procedure?

Checking that the fifth wheel jaws are locked

Connecting the air lines

Raising the landing gear fully

Pulling forward before connecting air lines

20 / 25

The air brake system is considered low when pressure falls below:

90 psi

60 psi

45 psi

30 psi

21 / 25

When parking a truck on a downhill slope, you should:

Turn wheels away from the curb

Turn wheels toward the curb

Keep wheels straight

Leave the transmission in neutral

22 / 25

What information must be included in a pre-trip inspection report?

Vehicle maintenance schedule

Driver's work history

Defects discovered during inspection

Fuel consumption rates

23 / 25

When driving downhill with a heavy load, you should:

Use the same gear as climbing

Use a higher gear than climbing

Use neutral to save fuel

24 / 25

The purpose of a truck's spring brakes is to:

Provide extra braking on wet roads

Function as the parking brake

Assist during emergency braking only

Reduce brake fade on long descents

25 / 25

What document must be carried when transporting dangerous goods?

Bill of lading

Shipping manifest

Safety fitness certificate

Transportation of dangerous goods document

Your score is

The average score is 73%

Mastering the ICBC Class 3 Knowledge Test: A Comprehensive Practice Test

Complete ICBC class 3 practice test Download

What is an ICBC Class 3 Licence?

In BC, a Class 3 licence permits you to drive:

Trucks with more than two axles, such as dump trucks, large tow trucks, and garbage trucks.
Trucks with more than two axles pulling trailers or vehicles where the towed vehicle weighs up to 4,600 kg.
Two-axle vehicles (not fitted with air brakes) towing trailers or cars in which the trailing car weighs over 4,600 kg (if the truck is not equipped with air brakes – this is an exception).
Tow vehicles.
Mobile truck cranes.
Any vehicle licenced under a Class 5 licence (autos, light trucks, etc.).
Critical Clarification: Your Class 3 license does not permit you to operate truck-tractors towing semi-trailers (for which you require a Class 1 license). It’s only for single-unit heavy trucks (perhaps towing light trailers) or specific two-axle truck/heavy trailer combinations without air brakes.

The ICBC Class 3 Knowledge Test: Where You Start

Passing the knowledge test is the mandatory first step before you may proceed to the practical on-road test.

Purpose: To evaluate your knowledge of the specific rules, safety procedures, and operating information required for Class 3 vehicles.
Format: A computerized multiple-choice test administered at an ICBC driver licensing office.
Location: You’ll take the test at an ICBC driver licensing office. Determine if appointments are necessary, though walk-in service is generally acceptable.
Prerequisite: You must have a full Class 5 BC driver’s licence (or higher, but excluding motorcycle-only licences) that is valid and usually be 18 years of age or older.
What Is Tested in the Test?

Class 3 knowledge test questions are taken primarily from ICBC’s “Driving Commercial Vehicles” manual.

Expect to have questions inquiring about:

1.General Commercial Driving Information: Reinforcing road signs, signals, markings, rules of the road, and proper driving practices, often with a heavy vehicle emphasis (Chapters 2, 3, & 4 in the commercial guide).
2. Truck-Specific Info (Very Important!): Highlight strongly chapters that discuss trucks (Usually Chapter 5 in the “Driving Commercial Vehicles” guide). This includes:

Heavy truck handling behavior (turning, braking distance, off-tracking).
Large vehicle speed and space management.
Hill and mountain driving practices.
Safe co-sharing of the road with lighter vehicles.

3. Load Security (Note!): Being able to secure loads is fundamental to safe operation of trucks and operation (typically Chapter 6). Search for questions on:

General principles of load security.
Requirements for different types of loads.
Inspection of securing devices.

4. Vehicle Inspections: Intimate knowledge of pre-trip, en route, and post-trip inspection procedures for heavy trucks (Typically Chapter 7). You need to know what to inspect and why it is important.
5. Air Brakes: Most Class 3 vehicles are air-braked. While the Air Brake Endorsement is separate from a knowledge test and practical certification, rudimentary air brake knowledge is often included in the Class 3 test. You will most likely need the Air Brake Endorsement (Code 15) to operate most Class 3 vehicles, so it is highly recommended, if not required, that you learn the ICBC Air Brake Manual.
6. Hours of Service: Initial familiarity with commercial vehicle driver hours of service regulations can be covered.
Preparing for the Class 3 Knowledge Test

Persevering preparation is success:

Read the Manual: The ICBC’s “Driving Commercial Vehicles” manual is your best study aid. Obtain the most recent edition and thoroughly read in detail the chapters that apply to Class 3 operation, especially those addressing trucks, load security, and pre-trip inspections.
Don’t Forget the Basics: Take a quick glance at the “Learn to Drive Smart” guidebook for general regulations that you might have forgotten.
Practice, Practice, Practice: Utilize ICBC practice knowledge tests online, the commercial vehicle one (Classes 1-4). This gets you familiar with the nature of questions posed and where you need to further study.
Read the Air Brake Manual: Because the majority of Class 3 vehicles utilize air brakes, it might be a good idea to read the ICBC Air Brake Manual, even before you take the independent air brake test. You’re going to need the endorsement sooner or later anyway.
Check into Professional Training: Most driving schools focus on hands-on skills, but some offer classroom training or study guides which can help you with the knowledge test.

Congratulations, you have passed the Class 3 knowledge test! Here’s what’s next:

Get Your Class 3 Learner’s Licence: This permits you to practice driving Class 3 vehicles under the supervision of a qualified examiner.
Medical Examination: Obtain a satisfactory driver’s medical examination report. ICBC provides the form.
Air Brake Endorsement: Pass the independent air brake knowledge test and practical air brake pre-trip test to get the Code 15 endorsement added to your license (for most Class 3 vehicles).
Practice Driving: Acquire extensive behind-the-wheel skills in a Class 3 vehicle under supervision. It is highly recommended that professional instruction by a certified driving school be taken.
Take and Pass the Class 3 Road Test: This practical test consists of a thorough pre-trip inspection, the air brake test (if applicable), and evaluation of your on-road driving skill in a Class 3 truck.