Free Arizona DMV CDL — General Knowledge Practice Test 2026
The Arizona CDL — General Knowledge knowledge test has ~50 questions, and you need ~40 correct (80%) to pass. Practice free with questions written from the official Arizona driver handbook — every one has a clear explanation, and you can retake as often as you like with no sign-up.
Content reviewed against official driver handbooks · August 12, 2026
What's on the Arizona written test
The Arizona CDL — General Knowledge knowledge test has ~50 questions; you need ~40 correct (80%) to pass.
Based on the official Arizona exam format — always confirm current details with your state DMV.
Practice by topic
Focus on one area at a time — each topic has its own set of Arizona practice questions.
Learn the shapes, colors, and meanings of regulatory, warning, and guide signs — from stop and yield to construction and school-zone signs.
Speed limits, turning and signaling rules, headlight and seat-belt requirements, and the everyday laws every driver must follow.
How to read traffic signals, lane lines, and pavement markings — including yellow and white lines, arrows, and flashing lights.
Who goes first at intersections, four-way stops, roundabouts, and crosswalks, and how to yield to pedestrians and emergency vehicles.
Following distance, scanning, blind spots, using your lights, and the habits that prevent crashes and keep you in control.
Driving safely around motorcycles, bicycles, large trucks, pedestrians, and school buses — and knowing who has the right of way.
Blood alcohol limits, zero-tolerance and implied-consent laws, and how alcohol and drugs — legal or not — affect your driving.
Legal and illegal parking, colored curbs, distances from hydrants and crossings, and how to park safely on hills.
Choosing a safe speed, keeping a space cushion, adjusting for weather and traffic, and understanding stopping distance.
What to do when things go wrong — brake failure, tire blowouts, skids, and stalling on railroad tracks.
The point system, license suspension, provisional-license rules, insurance requirements, and other licensing basics.
How to pass the first time
- Read the official Arizona driver handbook at least once before test day.
- Practice by topic to find your weak spots, then fix them.
- Take full-length practice tests until you pass comfortably every time.
- Read every explanation — understanding beats memorizing.
Arizona CDL — General Knowledge test — frequently asked questions
How many questions are on the Arizona CDL — General Knowledge test?
The Arizona CDL — General Knowledge knowledge test has ~50 questions, and you need ~40 correct (80%) to pass. Our practice tests mirror that format.
How many questions can I miss on the Arizona CDL — General Knowledge test?
You can miss up to ~10 of the ~50 questions and still pass — you need ~40 correct, which is 80%.
Can I retake the practice test?
Yes — practice as often as you like, completely free. The questions and answer choices are shuffled each time.
Can I take the Arizona practice test in Spanish?
Yes. Every question here is available in English and Spanish — switch languages anytime. Many states also offer the real knowledge test in languages other than English; confirm what Arizona offers with your DMV.
Can I practice on my phone?
Yes. The practice tests work in any mobile or desktop browser — no app or sign-up needed — so you can study anywhere.
Are these the real DMV test questions?
No. Our questions are original, written from the current official Arizona driver handbook to match the real test's topics and style. We are not affiliated with any DMV or government agency.
What's the best way to study?
Read the Arizona driver handbook, practice by topic to target weak areas, and finish with full-length tests until you consistently pass.
Other Arizona practice tests
Take the CDL — General Knowledge test in another state
Every Arizona question is written from the official Arizona driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free
Arizona CDL — General Knowledge questions with answers
20 sample questions from the Arizona CDL — General Knowledge question bank — each with the correct answer, a short explanation, and the section of the official handbook it comes from.
Show all 20 questions with answers
1. What is the minimum age to qualify for a standard, unrestricted Arizona commercial driver license?
Correct answer: 21 years old
A commercial license that lets you drive across state lines is issued only at age 21; someone 18 to 20 may hold only an Arizona-only intrastate credential.
Source: Arizona CDL Manual — Section 1: Introduction
2. What is the safest way to handle a curve in a large vehicle?
Correct answer: Slow to a safe speed before entering and avoid braking in the curve
Reduce speed before the curve and be in a gear that lets you pull slightly through it; braking inside a curve makes a skid or rollover far more likely.
Source: Arizona CDL Manual — Section 2: Driving Safely
3. The slow-moving-vehicle emblem you may see on farm machinery or tractors looks like what?
Correct answer: An orange-centered triangle bordered in red
The slow-moving-vehicle symbol is a reflective triangle with an orange center and a red border, warning you that the vehicle ahead travels well below normal speed.
Source: Arizona CDL Manual — Section 2: Driving Safely
4. A 12-ounce beer, a 5-ounce glass of wine, and a shot of 80-proof liquor share what in common?
Correct answer: They each contain the same amount of alcohol
These typical servings all deliver an equivalent quantity of alcohol, so it is the amount consumed, not the type of drink, that matters.
Source: Arizona CDL Manual — Section 2: Driving Safely
5. In controlled braking, how are the brakes applied?
Correct answer: As hard as possible without locking the wheels, with small steering movements
Controlled braking means squeezing the brakes just short of lockup while keeping steering inputs small; if the wheels lock, release and reapply.
Source: Arizona CDL Manual — Section 2: Driving Safely
6. What is true about the blind spots around a large commercial vehicle?
Correct answer: There are blind spots mirrors cannot reveal, so check them regularly
Even with well-adjusted mirrors, areas around the vehicle stay hidden; check your mirrors often so you know when others slip into these blind spots.
Source: Arizona CDL Manual — Section 2: Driving Safely
7. Toward which side should you back whenever it is possible?
Correct answer: The driver's side
Back toward the driver's side so you can watch the rear of the vehicle through your side window, even if it means circling the block to set up the position.
Source: Arizona CDL Manual — Section 2: Driving Safely
8. What is the minimum tread depth required in every major groove on the front tires?
Correct answer: 4/32 of an inch
Front (steering) tires need at least 4/32 inch of tread in each major groove, while the other tires may go as low as 2/32 inch.
Source: Arizona CDL Manual — Section 2: Driving Safely
9. On a two-lane road, railroad pavement markings consist of what?
Correct answer: Painted RR letters alongside a large X and a no-passing line
The road surface displays a large X, the RR letters, and a no-passing line, carrying the same meaning as the advance warning sign.
Source: Arizona CDL Manual — Section 2: Driving Safely
10. For a driver not always required to stop, a first railroad grade-crossing violation brings a disqualification of at least how long?
Correct answer: 60 days
A first crossing violation costs at least 60 days, a second within three years brings 120 days, and a third within that period brings a full year.
Source: Arizona CDL Manual — Section 1: Introduction
11. Why should you be cautious around a stopped bus?
Correct answer: Riders may step across ahead of or behind it and cannot see you
Riders leaving a stopped bus frequently walk across ahead of or behind it, where neither of you can see the other.
Source: Arizona CDL Manual — Section 2: Driving Safely
12. Within how many days of a conviction for a moving violation (parking aside) must you tell your employer?
Correct answer: 30 days
You have thirty days after being convicted of any traffic offense other than parking to notify your employer, whatever vehicle you were driving at the time.
Source: Arizona CDL Manual — Section 1: Introduction
13. At 55 mph in good conditions, the minimum total stopping distance is about what?
Correct answer: About 419 feet
Once perception, reaction, and braking are combined, a rig at 55 mph needs a minimum of about 419 feet to come to a full stop.
Source: Arizona CDL Manual — Section 2: Driving Safely
14. In the hazard-class system, which class covers flammable liquids such as gasoline?
Correct answer: Class 3
Flammable liquids like gasoline and acetone fall in Class 3 of the hazardous-materials classification.
Source: Arizona CDL Manual — Section 2: Driving Safely
15. What is the manual's guidance about drugs that might mask tiredness while driving?
Correct answer: Avoid any drug that hides fatigue, since only rest cures it
No substance should be used to cover up fatigue; the sole remedy for being tired is sleep, so stay away from anything that only masks it.
Source: Arizona CDL Manual — Section 2: Driving Safely
16. If an oncoming driver drifts into your lane, which way is generally best to steer?
Correct answer: To your right
Moving to your right is usually best because a driver who realizes the mistake will instinctively pull back into their own lane.
Source: Arizona CDL Manual — Section 2: Driving Safely
17. To avoid off-tracking problems on a left turn, when should you begin turning?
Correct answer: After reaching the center of the intersection
Wait until you have reached the middle of the intersection before turning left; turning too early can bring the left side of your vehicle into another vehicle because of off-tracking.
Source: Arizona CDL Manual — Section 2: Driving Safely
18. When a helper assists you in backing, what should you agree on first?
Correct answer: A set of hand signals, especially one for 'stop'
Before you move, work out hand signals you both understand and settle on a clear signal for 'stop,' keeping the helper where you can see them near the rear.
Source: Arizona CDL Manual — Section 2: Driving Safely
19. Roughly how long does a driver's eyes leave the road, on average, while sending or reading a text?
Correct answer: About 4.6 seconds
Texting takes the eyes off the road for about 4.6 seconds — at 55 mph that is roughly the length of a football field traveled essentially blind.
Source: Arizona CDL Manual — Section 2: Driving Safely
20. Why should you not signal other drivers when it is safe for them to pass?
Correct answer: You could misjudge the situation and be blamed for causing a crash
Do not wave others past; if your signal proves wrong and a crash results, you could be held responsible, so let each driver make that judgment.
Source: Arizona CDL Manual — Section 2: Driving Safely