How Many Questions Are on the Class 4 Knowledge Test?

If you're getting ready to apply for a Class 4 licence so you can drive a taxi, rideshare vehicle, small bus, or ambulance, the first thing you probably want to know is exactly what you're up against on exam day. The short answer: in Alberta, the Class 4 knowledge test is made up of 30 multiple-choice questions, and you need to answer at least 25 of them correctly to pass — that works out to roughly 83%. According to the driving-test resource Tests.ca, the exam draws directly from the official Alberta Commercial Driver's Guide, so every question you see on test day can be traced back to that handbook. If your province isn't Alberta, don't worry — the exact number of questions and the pass mark can shift slightly from one province to the next, since each Class 4 program is administered provincially rather than nationally, so it's worth confirming the number with your local licensing office if you're testing outside Alberta.

What the Test Actually Looks Like

The Class 4 knowledge test isn't a written exam in the traditional sense — you won't be handed a blank sheet and asked to write essay answers. Every question is multiple-choice, usually with three or four possible answers, and you simply select the one that matches what you learned from the official guide. Most testing centres run the exam on a computer terminal, though some smaller registry offices may still use a paper version, so it's worth calling ahead if you want to know exactly what to expect at your specific location. There typically isn't a strict time limit that forces you to rush, but you also shouldn't expect unlimited time to sit and deliberate over every question — the expectation is that you move through it at a steady, confident pace. Depending on where you're testing, the exam may be offered in English only, or in a small number of additional languages, so check with your local registry if English isn't your first language.

What Topics You Can Expect

Because a Class 4 licence lets you carry passengers professionally, the test leans heavily on passenger safety and responsibility rather than just basic rules of the road. Expect questions on the safe transport of passengers, including how to handle boarding and disembarking safely, appropriate conduct with vulnerable riders, and emergency procedures. You'll also be tested on rules specific to the type of vehicle you intend to drive, whether that's a taxi, a rideshare car, a small bus, or an ambulance, along with general commercial driving regulations. A pre-trip vehicle inspection is almost always covered, since knowing how to check your vehicle before you get behind the wheel is considered a core professional responsibility. If your particular Class 4 vehicle uses air brakes, you may also see a handful of questions on air brake systems, though this doesn't apply to every applicant, so it's worth checking whether it applies to your situation before you spend hours studying material you won't actually be tested on.

Where Professional Instruction Makes a Real Difference

Reading through the official guide on your own can only take you so far, and this is exactly where working with an experienced driving school pays off. At Actron Driving School, instructors walk you through the material that actually shows up on the Class 4 knowledge test, point out the areas most applicants get tripped up on, and help you build the kind of confidence that's hard to get from self-study alone. If you'd rather not leave your exam prep to guesswork, it's worth reaching out to Actron Driving School and letting a professional guide you through the process from start to finish.

What Happens If You Don't Pass

Failing the knowledge test isn't the end of the road, but it's not something you want to treat casually either. If you don't reach the required score, most registry offices will let you book another attempt, though you'll usually have to wait a short period, often until the next business day, before you can try again. In most cases, you'll also need to pay the testing fee again for each additional attempt, so it pays to walk in prepared the first time rather than treating the test as a low-stakes trial run. Some testing centres also apply an early-exit rule, where getting a certain number of questions wrong ends the test immediately and records a fail, so pacing yourself and reading carefully matters just as much as knowing the material.

Getting Ready to Book Your Test

Before you can even sit the knowledge test, there are a few boxes to check. You'll generally need to be at least 18 years old, hold a valid Class 5 licence already, and submit a completed medical report form from your doctor, since Class 4 drivers are responsible for passenger safety in a way that standard drivers aren't. There's also a fee to take the knowledge test itself, which is separate from the eventual road test, so factor both into your budget when you're planning your timeline. Once your paperwork is in order, you can typically book your test at your local registry or licensing office.

A Few Sample Questions to Get a Feel for It

Reading about the test only gets you so far — actually seeing the style of question helps far more. A typical question might ask what a driver should do before allowing passengers to board a small bus, with answer choices covering things like checking the wheelchair lift, confirming the parking brake is set, and inspecting the exit doors. Another common style of question tests your understanding of following distance and space management when carrying passengers, since commercial drivers are held to a higher standard than everyday motorists. Working through a handful of these before test day gives you a much clearer sense of how the real exam is phrased, which is often half the battle when nerves are involved.

One Quick Note Before You Book

The exact numbers above reflect Alberta's Class 4 program, and while many provinces follow a similar structure, the specifics can and do vary. British Columbia, Ontario, and other provinces each run their own version of the Class 4 knowledge test, sometimes with a different question count, a different pass threshold, or slightly different topic coverage. If you're not testing in Alberta, treat the numbers here as a helpful benchmark rather than a guarantee, and confirm the exact format with your provincial licensing authority before test day. That one extra step can save you from walking in with the wrong expectations and getting thrown off by a format you didn't anticipate.

Preparing for the Class 4 knowledge test doesn't need to feel overwhelming once you know what's actually being asked of you. Thirty questions, a clear pass mark, and a defined set of topics is a manageable target, especially if you spend time with the official guide and work through a few practice questions beforehand. Go in knowing the structure, the subject areas, and what happens if things don't go your way on the first try, and the exam becomes a lot less intimidating than it might feel right now.