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Alberta Commercial Practice Test 2026 – Free Alberta Class 1–4 Questions

Original questions written from the official Alberta handbook, with an explanation for every answer.

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  • 255 questions
  • 9 practice tests
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Practice test 1 · Question 1Score 0/0

Your load extends 1.8 m past the rear of the truck in daylight. What must you attach?

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All Alberta Class 1–4 practice tests

9 sets of 30 questions. Each set is fixed, so you can repeat it until you score 100%.

Exam facts

Key facts: Alberta Commercial Driver Knowledge Test (Class 1–4)

Free practice tests for Alberta's commercial knowledge tests: Class 1 (tractor-trailers), Class 2 (buses), Class 3 (heavy trucks) and Class 4 (taxis, ambulances and small buses). Every question is original, written from Alberta's official Commercial Driver's Guide (Spring 2023), and each answer explains the rule and names the guide page it comes from. No sign-up and no limits; your progress stays on your device.

Alberta's knowledge test has 30 multiple-choice questions and you need 25 right. The guide says questions can come from any chapter, so this site keeps a shared core (licensing, hours of service, trip inspections, dangerous goods, fatigue and railway crossings) and separate drills for each class. Start with the class you are applying for, then take a full 30-question mock exam.

What the test covers

Topics and question bank

Every question is tagged to one topic from the official handbook. Pick a topic to drill just that area.

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Sample Alberta Class 1–4 questions

Tap a question to see the answer. The full interactive test is at the top of the page.
  1. 1Your load extends 1.8 m past the rear of the truck in daylight. What must you attach?
    • A. An orange triangle on the load
    • B. A red flag, 30 cm square or larger
    • C. Nothing below 2 m
    • D. A white reflector on the load

    A load reaching or extending 1.5 m or more past the rear needs a red flag of at least 30 cm square by day. At night it needs a red light instead.

  2. 2During a circle check, what should you see at the fifth wheel?
    • A. The slider pin left unlocked
    • B. A small gap of daylight between the plate and the apron
    • C. Plate flush with the apron, jaws locked on the kingpin
    • D. Jaws left open so the trailer can pivot in turns

    The fifth wheel plate should sit flush with the trailer apron with no daylight showing, the jaws closed around the kingpin and the slider locked.

  3. 3When do you turn off the flashing lights after a stop?
    • A. Once you start moving
    • B. After all students are seated
    • C. As soon as the door closes
    • D. When the stop arm folds itself

    Turn off the flashing lights after all students are seated, release the park brake, signal left and re-enter traffic when it is safe.

  4. 4Where should your guide stand while you back up to unload?
    • A. Outside at the rear, in your view
    • B. In the passenger seat, watching the mirror
    • C. In front of the truck, facing you
    • D. Inside the dump box

    The guide should be outside and to the rear, able to see the vehicle's path and be seen by you. Stop if you lose sight of the guide.

  5. 5On a curve to the left, where should you keep the front of the vehicle?
    • A. Exactly in the middle of your lane
    • B. Close to the centre line the whole way
    • C. On the left shoulder
    • D. Toward the outside (right side)

    In a left curve keep the front closer to the outside so the trailer wheels do not cut into the opposing lane. In a right curve keep it closer to the centre so the trailer stays off the curb.

  6. 6If you double the weight of a vehicle, how much more braking force is needed to stop it?
    • A. Twice as much
    • B. Four times as much
    • C. Eight times as much
    • D. The same, thanks to better traction

    Doubling the weight doubles the braking force needed, and the stop takes about twice as long. Better traction from weight does not cancel this.

  7. 7How often does the guide recommend scheduling a break on a long trip?
    • A. Every two hours or 160 km
    • B. Every hour or 50 km
    • C. Every four hours or 300 km
    • D. Only when you feel tired

    Schedule a break every two hours or every 160 km. A 20 to 40 minute mid-afternoon nap also helps.

  8. 8At what speed should you enter a curve?
    • A. Any speed, then brake hard if needed
    • B. One needing no braking in the curve
    • C. The posted limit, braking hard once in the curve
    • D. Slightly above the limit to keep momentum

    Enter at a speed that requires no braking in the curve and lets you accelerate gently through it. Braking hard in a curve can cause a skid, rollover or jackknife.

  9. 9One brake on your unit is out of adjustment. What happens when you stop?
    • A. The ABS fixes the difference automatically
    • B. The vehicle stops faster because that side grips more
    • C. Nothing changes as long as the other brakes are good
    • D. The other brakes work harder, so the stop takes longer

    All brakes must share the work. If one is poorly adjusted, the rest must generate more friction, so the vehicle takes longer to stop and may pull or skid.

  10. 10A train is approaching a crossing. How close to the nearest rail may you stop?
    • A. No closer than 5 m
    • B. No closer than 2 m
    • C. No closer than 50 m
    • D. No closer than 15 m

    Stop no closer than five metres from the nearest rail and wait until the train has passed or stopped and it is safe to cross.

About the test

About the Alberta Commercial Driver Knowledge Test (Class 1–4)

Alberta has four commercial licence classes. Class 1 lets you drive any motor vehicle except a motorcycle, including tractor-trailers. Class 2 covers buses, plus everything a Class 3, 4 or 5 holder may drive. Class 3 covers single motor vehicles with three or more axles, and such a truck towing a trailer without air brakes. Class 4 covers taxis, ambulances and buses that seat fewer than 25 people including the driver.

To upgrade, the Government of Alberta says you need a full (non-GDL) Class 5 licence and must be at least 18. You take the knowledge test and a vision test at a registry agent. Class 1, 2 and 4 also need a Driver's Medical Report. Classes 1, 2 and 3 then need a road test with a pre-trip inspection; Class 4 no longer has a road test. Before a Class 1 road test you must complete Tier 2, the Core Learning Program of the Class 1 Learning Pathway.

The knowledge test is the same format for every class: 30 multiple-choice questions, 25 correct to pass, once per day, paid each time. The Commercial Driver's Guide adds that the test stops and is recorded as a fail as soon as you get six wrong. Class 1 applicants can be asked about any chapter, because a Class 1 licence lets you drive almost every vehicle type.

Air brakes are a separate qualification in Alberta. To drive a vehicle with air brakes you need a Q endorsement, which requires an approved air brake course at a licensed driving school and its own knowledge test. The student Air Brake Manual is handed out on that course and is not freely published, so this site only covers the air brake basics found in the Commercial Driver's Guide, such as stopping distance, lag time and the trip air brake check.

Everything here comes from the Commercial Driver's Guide, published by Alberta Transportation and Economic Corridors under the Open Government Licence – Alberta. The guide is meant to be used together with the Driver's Guide for cars and light trucks, so review the rules of the road there too. This site is not affiliated with the Government of Alberta or any registry agent.

Study plan

How to prepare

  1. 1Read the Commercial Driver's Guide chapters for your class first. Class 1 applicants should read chapter 4 closely (braking, coupling, off-tracking, reversing), bus drivers chapter 5, truck drivers chapter 6 and the cargo and size rules, and taxi or ambulance drivers chapters 7 and 8. Everyone needs chapters 1 to 3 and 9 to 11.
  2. 2Learn the numbers exactly. Many questions turn on a figure: 18 for the minimum age, 11,794 kg and 4,500 kg for the inspection and safety certificate thresholds, 3.2 mm and 1.6 mm of tire tread, 5 to 15 metres at railway crossings, 30 and 75 metres for warning devices, and the hours-of-service limits.
  3. 3Keep Alberta and federal hours of service apart. Alberta's limits are 13 hours driving or 15 on duty in a shift; federal rules use 13, 14 and 16 hours, daily off-duty time and cycles of 70 hours in 7 days or 120 hours in 14 days. Questions often swap the two sets of numbers.
  4. 4Practise the trip air brake check in order: tractor protection valve at 40 to 60 psi, low air warning by 60 psi, park control valve at 20 to 45 psi, build-up from 50 to 90 psi within three minutes, governor cut-out 120 to 135 psi with cut-in 20 to 25 psi lower, and leakage of no more than 4 psi plus 2 psi per trailer.
  5. 5Use the class drills on this site to find weak spots, then the topic pages, which list the key rules from our notes before the questions. Each wrong answer is saved to your mistake list so you can review it later.
  6. 6Take the 30-question mock exam under test-like conditions. Aim to score 27 or more, comfortably above the 25 needed, because the real test stops at the sixth wrong answer.
  7. 7Bring your glasses or contact lenses for the vision test, photo ID, and payment for the test. If you need help reading English, ask the registry agent about oral-assisted tests (Class 1, 2 and 4) or oral tests (Class 3).
  8. 8After the knowledge test, get road-ready: Class 1 needs the Core Learning Program and an air brake course, and Classes 1, 2 and 3 need a pre-trip inspection on the road test where you point to each item and explain what you are checking, without notes.

FAQ

Alberta Class 1–4 test questions people ask

How many questions are on the Alberta commercial knowledge test, and what is the pass mark?

The Government of Alberta says the driver's knowledge test has 30 multiple-choice questions and you need 25 correct to pass. The Commercial Driver's Guide adds that the test ends and counts as a fail once you answer six questions wrong.

Is there a different knowledge test for Class 1, 2, 3 and 4?

Each class has its own knowledge test, but the format is the same: 30 questions, 25 to pass. The guide says questions may come from any chapter, and Class 1 applicants in particular can be asked about any vehicle type. That is why this site has a shared core plus a drill for each class.

How old do you have to be for a commercial licence in Alberta?

You must be at least 18 and hold a full Class 5 licence. You cannot apply for Class 1, 2, 3 or 4 while you are a probationary (GDL) driver.

Do I need a road test for every class?

No. Classes 1, 2 and 3 need a road test with a pre-trip inspection, and Class 1 also needs coupling and uncoupling. Since February 1, 2023 Class 4 has no road test, but you still need the knowledge test, a vision test and a medical report.

Does this site cover the Alberta air brake (Q) test?

Only partly. The Q endorsement needs an approved air brake course, and its student Air Brake Manual is handed out on the course rather than published for free. We cover the air brake basics that appear in the Commercial Driver's Guide, such as stopping distance, brake lag, safe braking on hills and the trip air brake check, but not the full air brake test.

What do I need before a Class 1 road test?

Alberta's commercial licence page says you must first complete Tier 2, the Core Learning Program, of the Class 1 Learning Pathway, and you cannot get Class 1 without the air brake endorsement. The road test uses a tractor-trailer with full air brakes and a trailer at least 45 feet long.

How much does the knowledge test cost?

Alberta does not list a single price. The government says maximum charges for tests are set in the Registry Agent Product Catalogue, and registry agents may add service charges, so ask your registry agent. You pay each time you take the test.

Can I take the commercial knowledge test in another language?

Translated tests are offered for Class 7 only. For commercial classes, Alberta offers oral-assisted tests for Class 1, 2 and 4 and oral tests for Class 3, read aloud in English by a registry agent employee.

What happens if I fail?

You can take the knowledge test once per day, and you pay each time. Review the topics you missed, using the mistake list on this site, before you go back.

Are these the real Alberta test questions?

No. The real questions are not published. Every question here is original, written from our own notes on the official Commercial Driver's Guide, and each explanation cites the page it is based on. Use them to learn the rules, not to memorise answers.

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