Free Maine DMV CDL — General Knowledge Practice Test 2026
The Maine CDL — General Knowledge knowledge test has ~50 questions, and you need ~40 correct (80%) to pass. Practice free with questions written from the official Maine 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 Maine written test
The Maine CDL — General Knowledge knowledge test has ~50 questions; you need ~40 correct (80%) to pass.
Based on the official Maine 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 Maine 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 Maine 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.
Maine CDL — General Knowledge test — frequently asked questions
How many questions are on the Maine CDL — General Knowledge test?
The Maine 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 Maine 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 Maine 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 Maine 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 Maine 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 Maine driver handbook, practice by topic to target weak areas, and finish with full-length tests until you consistently pass.
Other Maine practice tests
Take the CDL — General Knowledge test in another state
Every Maine question is written from the official Maine 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
Maine CDL — General Knowledge questions with answers
20 sample questions from the Maine 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. On Maine's school bus skills test, which maneuver replaces the alley dock used in the Class B test?
Correct answer: The bus turnaround
The school bus off-road test repeats the Class B maneuvers with one change: the applicant demonstrates a bus turnaround in place of the alley dock.
Source: Maine Commercial Driver License Manual — Special Procedure for Obtaining a School Bus Endorsement
2. On Placard Table 2, which two entries show no placard name at all?
Correct answer: Infectious Substances (6.2) and ORM-D
Table 2 lists "(None)" in the placard column for Division 6.2 infectious substances and for ORM-D.
Source: Maine Commercial Driver License Manual — Section 9.3.11, Placard Tables
3. Your truck has an oil temperature gauge. What does the hot-weather section tell you to do with it?
Correct answer: Check while driving that the temperature stays within the proper range
Engine oil helps cool the engine as well as lubricate it, so in hot weather you confirm there is enough oil and keep an eye on the oil temperature gauge as you drive.
Source: Maine Commercial Driver License Manual — Section 2.14.1, Vehicle Checks
4. Which of these is NOT among the places and situations where the manual says conflicts arise?
Correct answer: Open stretches where all traffic moves at one speed
A conflict is any time you must change speed or direction to avoid someone. The manual points to intersections, merges, forced lane changes, stalled or slow traffic and accident scenes.
Source: Maine Commercial Driver License Manual — Section 2.8.3, Drivers Who Are Hazards
5. According to the inspection section, what can damage to the batteries or electrical system lead to?
Correct answer: A breakdown, or an electrical short that starts a fire on board
Batteries are checked for secure mounting, tight connections and sound cables because electrical damage can strand the vehicle or cause a short and a fire.
Source: Maine Commercial Driver License Manual — Section 11.5.3, Side of Vehicle
6. At the screening, a Maine applicant cannot reach the required vision standard. What happens next?
Correct answer: The examiner refers the applicant to an eye doctor, and no permit is issued until a completed referral form shows the standard is met
The examiner sends the applicant to an eye doctor the applicant picks. A permit follows only once the doctor's referral form comes back showing the vision standard has been satisfied.
Source: Maine Commercial Driver License Manual — Vision Requirements
7. On a coupling other than a fifth wheel, how should safety cables or chains be arranged?
Correct answer: Secure and crossed, with no kinks or excessive slack
For pintle hooks and other hitches, the safety cables or chains must be fastened, crossed and free of kinks and extra slack, and breakaway cables must be engaged.
Source: Maine Commercial Driver License Manual — Section 11.6.1, Combination Vehicles Only
8. How does the manual rank drowsy driving among the causes of traffic collisions?
Correct answer: As one of the leading causes
Fatigued or drowsy driving is described as one of the leading causes of collisions, with about 100,000 police-reported crashes a year attributed to it.
Source: Maine Commercial Driver License Manual — Section 2.11.2, Driver Factors
9. Which of these is NOT among the manual's clues that another driver is confused?
Correct answer: Holding a steady speed in the right lane
Confused drivers do unexpected things: sudden stops, pointless lane changes, backing up, hesitating or crawling along. Steady, predictable driving is not a clue.
Source: Maine Commercial Driver License Manual — Section 2.8.3, Drivers Who Are Hazards
10. When may a Maine applicant start the TSA fingerprint and background records check for a hazmat endorsement?
Correct answer: After passing the hazardous materials written examination
Maine's manual says the fingerprint and background process may begin once the hazardous materials written exam has been passed.
Source: Maine Commercial Driver License Manual — Hazmat Endorsement Information
11. You are traveling 55 mph in ideal conditions when a stalled car appears 400 feet ahead in your lane. By the manual's figures, can you stop in time?
Correct answer: No; the minimum total stopping distance at 55 mph is 419 feet
Perception (142 feet), reaction (61 feet) and braking (216 feet) add up to at least 419 feet at 55 mph, which is more than the 400 feet available.
Source: Maine Commercial Driver License Manual — Section 2.6.1, Stopping Distance
12. On the road test's stop/start maneuver, which of these is NOT one of the steps once you have stopped?
Correct answer: Shutting off the engine and removing the key
Once stopped you cancel the signal, switch on the four-way flashers, set the parking brake, shift to neutral or park and take your feet off the pedals. The engine keeps running.
Source: Maine Commercial Driver License Manual — Section 13.1.6, Stop/Start
13. Most rows of the manual's hazard class table are numbered 1 through 9. Which two rows carry no class number?
Correct answer: ORM-D and Combustible Liquids
After the nine numbered classes, the table adds two rows marked "None": ORM-D, with hair spray and charcoal as examples, and Combustible Liquids, with fuel oils and lighter fluid.
Source: Maine Commercial Driver License Manual — Section 2.23.3, Lists of Regulated Products
14. During a walk-around you find a red side-marker light midway along the trailer's side. What does the inspection guide say about that color?
Correct answer: Only the rear side-markers should be red; the others should be amber
Side-marker lights and reflectors are red at the rear and amber everywhere else, so a red lamp at mid-length is the wrong color.
Source: Maine Commercial Driver License Manual — Section 2.1.5, Seven-step Inspection Method
15. Within three years a driver is convicted of a third railroad-highway grade crossing violation. For how long, at minimum, is the CDL lost?
Correct answer: One year
The penalties step up from 60 days to 120 days and then to at least a full year for a third violation in a three-year period.
Source: Maine Commercial Driver License Manual — Section 1.3.5, Railroad-highway Grade Crossing Violations
16. After an accident, which of these does the manual list as a cause of fire?
Correct answer: Spilled fuel and improper use of flares
Fires after a crash are tied to fuel that has spilled and to flares that are handled the wrong way.
Source: Maine Commercial Driver License Manual — Section 2.21.1, Causes of Fire
17. You have passed every phase of the Maine skills test. What must you turn in to receive your Commercial Driver's License?
Correct answer: Your learner's permit
Once all phases are passed, the applicant hands over the learner's permit in exchange for the CDL.
Source: Maine Commercial Driver License Manual — Definitions of Classes
18. During the CDL vehicle inspection test, will you have to crawl under the vehicle?
Correct answer: No
You walk around the vehicle and get in and out of it, naming and explaining each item, but the manual says you will not have to crawl underneath.
Source: Maine Commercial Driver License Manual — Section 11, Vehicle Inspection Test
19. A drunk rider is causing trouble on your bus. Whose safety does the manual say you must look after?
Correct answer: The disruptive rider's as well as everyone else's
The driver is responsible for the drunk or disruptive rider too, which is why such a rider is not put off where it would be unsafe.
Source: Maine Commercial Driver License Manual — Section 4.3.2, At Stops
20. On a school bus post-trip inspection you find a problem. To whom does the manual say it should be reported?
Correct answer: Immediately to your supervisor or school authorities
Any problem or special situation found on the walk-through and walk-around is to be reported right away to a supervisor or to school authorities.
Source: Maine Commercial Driver License Manual — Section 10.2.6, Post-trip Inspection