Free Hawaii DMV CDL — General Knowledge Practice Test 2026
The Hawaii CDL — General Knowledge knowledge test has ~50 questions, and you need ~40 correct (80%) to pass. Practice free with questions written from the official Hawaii 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 Hawaii written test
The Hawaii CDL — General Knowledge knowledge test has ~50 questions; you need ~40 correct (80%) to pass.
Based on the official Hawaii 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 Hawaii 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 Hawaii 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.
Hawaii CDL — General Knowledge test — frequently asked questions
How many questions are on the Hawaii CDL — General Knowledge test?
The Hawaii 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 Hawaii 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 Hawaii 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 Hawaii 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 Hawaii 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 Hawaii driver handbook, practice by topic to target weak areas, and finish with full-length tests until you consistently pass.
Other Hawaii practice tests
Take the CDL — General Knowledge test in another state
Every Hawaii question is written from the official Hawaii 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
Hawaii CDL — General Knowledge questions with answers
20 sample questions from the Hawaii 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. Which daily habit does the manual recommend to give you more energy and help prevent drowsiness?
Correct answer: Making exercise part of your daily life
The list for preventing drowsiness before a trip includes getting adequate sleep, planning the route, avoiding medications that cause drowsiness, and working exercise into your daily routine for more energy.
Source: Hawaii Commercial Driver License Manual — Section 2.11.2, Driver Factors
2. On the inspection test, which signs on the exhaust system point to a leak?
Correct answer: Rust or carbon soot
When you inspect the exhaust system you look for damage and for signs of leaks, and the manual names rust and carbon soot as those signs. The system should be tightly connected and securely mounted, with no cracks, holes or severe dents.
Source: Hawaii Commercial Driver License Manual — Section 11.2.5, Side of Vehicle
3. The manual says some vehicles are slow by nature and may carry the red-and-orange slow-moving vehicle symbol. Which of these is NOT one of the examples it names?
Correct answer: Step vans making local deliveries
The manual's examples of naturally slow vehicles are mopeds, farm machinery, construction machinery and tractors. Step vans and delivery trucks come up as a different hazard: their drivers are often in a hurry and may step out or pull into traffic suddenly.
Source: Hawaii Commercial Driver License Manual — Section 2.8.3, Drivers Who Are Hazards
4. You are pulling over for the stop/start maneuver on the road test. How should the vehicle be brought to rest?
Correct answer: To a full stop, without coasting
As you prepare for the stop you check traffic, signal right, slow smoothly, brake evenly and shift as needed. The vehicle is then brought to a complete stop with no coasting.
Source: Hawaii Commercial Driver License Manual — Section 13.1.6, Stop/Start
5. Why can railroad tracks be a 'space below' problem, according to the manual?
Correct answer: Trailers with low underneath clearance can get hung up partway across
The space under a vehicle can be very small, especially when it is heavily loaded. The manual singles out railroad tracks as a problem for trailers with low clearance underneath and warns against risking getting stuck halfway over.
Source: Hawaii Commercial Driver License Manual — Section 2.7.5, Space Below
6. You prepay for a Hawaii CDL skills test appointment and then miss it. What happens to the fee?
Correct answer: You forfeit the prepaid $50
The $50 skills test fee is paid in advance to schedule the appointment, and you need the prepaid appointment and your proof of payment to be tested. An applicant who misses the appointment forfeits the fee.
Source: Hawaii Commercial Driver License Manual — Hawaii Commercial Driver License Program, What Fees Do I Pay?
7. What does the manual's list of prohibited practices say about talking with riders while you are driving a bus?
Correct answer: Do not talk with riders or do anything else that distracts you while the bus is moving
The prohibited practices for bus drivers include talking with riders, or doing anything else distracting, while driving.
Source: Hawaii Commercial Driver License Manual — Section 4.5, Prohibited Practices
8. Why does the manual warn against easing gradually back onto the pavement after an emergency trip onto the shoulder?
Correct answer: The tires may catch without warning, and control can be lost
The manual says not to edge back onto the road little by little. If you do, the tires can grab when you do not expect it, and you can lose control of the vehicle.
Source: Hawaii Commercial Driver License Manual — Section 2.17.1, Steering to Avoid a Crash
9. Hawaii lists six railroad-highway grade crossing offenses for CMV drivers. Which of these is NOT on that list?
Correct answer: Failing to sound the horn before entering the crossing
The six offenses cover slowing and checking for a train, stopping when a stop is required, having room to clear the crossing, obeying traffic control devices and officials, and having enough undercarriage clearance. Sounding the horn is not among them.
Source: Hawaii Commercial Driver License Manual — Hawaii Commercial Driver License Program, What Happens if I Am Convicted of a CDL Disqualifying Offense?
10. The Individual Vehicle Distance Record (IVDR) used for IRP and IFTA record keeping is sometimes known by another name. What is it?
Correct answer: Driver Trip Report
The manual describes the IVDR, sometimes called a Driver Trip Report, as a widely accepted record that captures how far a vehicle went and what fuel was bought for it while it runs under apportioned registration and IFTA credentials.
Source: Hawaii Commercial Driver License Manual — Section 1.5, International Registration Plan International Fuel Tax Agreement
11. During the cab check on the inspection test, what should the ammeter or voltmeter (or its warning light) show?
Correct answer: That the charging system is working: the alternator or generator is charging, or the warning light has gone out
The ammeter or voltmeter is there to show that the charging system is doing its job. On the test you confirm that the gauge shows charging or that the charging warning light is off.
Source: Hawaii Commercial Driver License Manual — Section 11.1.2, Cab Check/Engine Start
12. For a long daytime drive, what does the manual suggest to guard against glare and eyestrain so you stay alert?
Correct answer: Wear sunglasses
The manual's tips for maintaining alertness include using sunglasses against glare and eyestrain, keeping cool, avoiding heavy foods and taking breaks. Sunglasses are for daytime; the night driving section tells you not to wear them at night.
Source: Hawaii Commercial Driver License Manual — Section 2.11.2, Driver Factors
13. Research cited in the manual compares CMV drivers who dial a mobile phone while driving with those who do not. How much greater are the dialers' odds of a safety-critical event?
Correct answer: 6 times greater
The odds of a crash, near-crash or unintentional lane deviation are 6 times greater for CMV drivers who dial while driving. The 23.2 figure in the manual is for texting.
Source: Hawaii Commercial Driver License Manual — Section 2.9.4, Cell/Mobile Phones
14. At a railroad crossing, a small sign under the crossbuck shows the number 3. What should that change about how you cross?
Correct answer: You must be sure all three tracks are clear before you start across
A sign below the crossbuck gives the number of tracks when the road crosses more than one. With several tracks, the manual tells you to be sure every one of them is clear before you cross, because a train on one track can hide a train on another.
Source: Hawaii Commercial Driver License Manual — Section 2.15.2, Warning Signs and Devices
15. You take Hawaii's basic control skills test in a school bus. What does the manual require of the bus doors?
Correct answer: They must be closed during the test
Hawaii's special instructions for skills testing call for a school bus to keep its doors shut throughout the basic control skills exercises.
Source: Hawaii Commercial Driver License Manual — Hawaii Commercial Driver License Program, Are there Special Instructions for Skills Testing?
16. With low beams you can see about 250 feet ahead, but the manual's minimum total stopping distance at 55 mph is 419 feet. What follows from that at night?
Correct answer: At 55 mph on low beams you could not stop within the distance you can see, so you must slow down
You have to keep your stopping distance inside your sight distance, which means driving slowly enough to stop within reach of your headlights. The manual's instruction for low beams is simply to slow down.
Source: Hawaii Commercial Driver License Manual — Section 2.11.4, Vehicle Factors
17. Which offense on Hawaii's major-offense list is marked as a lifetime disqualification rather than the usual one-year suspension for a first offense?
Correct answer: Using a CMV to commit a felony involving severe forms of trafficking in persons
Hawaii's major offenses generally mean one year's suspension the first time. Two entries are marked for lifetime disqualification: a controlled-substance felony committed with a motor vehicle, and using a CMV in a felony involving severe forms of human trafficking.
Source: Hawaii Commercial Driver License Manual — Hawaii Commercial Driver License Program, What Happens if I Am Convicted of a CDL Disqualifying Offense?
18. Which phone number does the manual give for making the call when you suspect human trafficking?
Correct answer: 1-888-3737-888
The manual's message to drivers on this topic ends by telling them to make the call to 1-888-3737-888. The other numbers shown here are county driver licensing offices listed in the same manual.
Source: Hawaii Commercial Driver License Manual — Truckers Against Trafficking
19. A quick evasive turn takes a firm two-handed grip. How does the manual say to make sure you have one when trouble comes?
Correct answer: Keep both hands on the wheel all the time, not just in emergencies
To turn quickly you need a firm grip with both hands. The manual's answer is to keep both hands on the wheel as a habit, so they are already there if an emergency happens.
Source: Hawaii Commercial Driver License Manual — Section 2.17.1, Steering to Avoid a Crash
20. On the road test, a slow vehicle is moving across the railroad tracks just ahead of you. May you pass it while you are in the crossing?
Correct answer: No. Passing, stopping, shifting and lane changes are all off limits until your whole vehicle is clear of the crossing
Before the crossing you slow down, look and listen, and check traffic. Once any part of the vehicle is in the crossing, the manual rules out stopping, changing gears, passing another vehicle and changing lanes.
Source: Hawaii Commercial Driver License Manual — Section 13.1.8, Railroad Crossing