All your missed questions are saved
automatically for extra practice.
It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All PlansIf you’re looking to operate double or triple trailer combinations, you’ve come to the right place to begin. You’ll need to add a Double/Triple (T) Endorsement to a Class A Commercial Driver’s License (CDL). The first step is passing the General Knowledge and Combination Vehicles knowledge tests. Once you have your Commercial Learner’s Permit (CLP) or Class A CDL, you’re eligible to take the Maine CDL Double/Triple Trailers Knowledge Test. Yes, you can go ahead and take the double/triple endorsement exam with your CLP.
The official exam is administered by the Maine DMV and is based on the most recent Maine CDL Manual. The test consists of 20 multiple-choice questions, and a passing score requires at least 16 correct answers (80%). That allowance of four missed responses doesn’t leave much room for error. If you fail, you must wait at least one business day to retest, and additional fees may apply after multiple failed attempts. Let’s make sure that doesn’t happen to you.
Our Free Maine CDL Double/Triple Trailers Practice Tests are designed to help you pass on your first attempt. Each practice test mimics the structure of the official DMV exam and includes real-time feedback, hints, and AI-powered learning tools that blow away standard study guides. All content is based on the Maine CDL Manual and covers coupling and uncoupling procedures and preventing jackknifing, as well as the “crack-the-whip” effect. The practice tests also cover safe following distances and inspections (including brake checks) of multiple trailers.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Maine’s primary roadways, like I‑95, US‑1, and US‑202, are crucial links to the rest of the Northeast. Major carriers, such as FedEx Ground, XPO Logistics, and Old Dominion Freight Line, often seek Maine-based drivers who are certified to pull doubles. Achieving this certification raises your level of options and income.
Most doubles and triples use air brake systems. You must also pass the Air Brakes Knowledge Test (and complete a skills test in a vehicle with air brakes). Otherwise, an “L” or “Z” restriction will appear on your license, making it illegal to drive air brake-equipped vehicles and severely limiting your overall marketability.
Our Maine-specific series of CDL endorsement practice tests includes tools for Air Brakes, Combination Vehicles, and a host of additional endorsements to further increase your versatility and driving options. Be sure to check out each one and be ready for any job that comes your way!
Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2026 ME Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DMV.
