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Do you want to drive combination trucks with two or even three trailers? Good news! Besides Double Pup vehicles, Wyoming also allows the following types of Long Combination Vehicles (LCVs) on officially designated routes (primarily I-80): Rocky Mountain Double, Turnpike Double, and Triple. (You may need an oversize permit if your vehicle exceeds the state’s length or weight limits.) However, only a minority of truck drivers are qualified and trained to operate LCVs, so demand for such drivers is high.
In Wyoming, the logistics and freight sector heavily uses double trailers for efficient transport. FedEx Freight, TForce Freight, and XPO Logistics use double or triple trailers for freight distribution. In the energy sector, HF Sinclair uses Rocky Mountain Doubles and Triples for fuel distribution. Peabody Energy and Arch Resources use double coal hoppers to transport coal from mines to rail. Cargill and ADM (Archer Daniels Midland) use double grain hoppers to transport wheat and corn. Tyson Foods and JBS USA use double livestock trailers to transport cattle.
To legally pull doubles or triples, you must hold a Class A CDL and obtain a Double/Triple (T) endorsement on your CDL. Wyoming also requires drivers of Turnpike Doubles or Triples to complete an LCV Driver Training Program.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
To get the T endorsement, you must pass the Double/Triple knowledge test. This official test covers such topics as safe handling, air brakes on doubles and triples, coupling and uncoupling, pre-trip inspections, emergency situations, and state and federal regulations on doubles and triples. (No special skills test is required for this endorsement.)
This knowledge test is based on the official Wyoming CDL manual (Wyoming CDL Handbook 2026), especially Chapter 7: Doubles and Triples. We can help you pass the knowledge test on your first try – something you can’t ensure just by reading the manual.
This is the first of our five Wyoming Doubles and Triples Endorsement Practice Tests. It’s based on Chapter 7 of the official CDL manual, just like the Double/Triple knowledge test. It’s up to date as of January 2026. The 20 multiple-choice questions and answers on this practice test deal with air lines, converter dollies, coupling, emergency situations, following distance, and rearward amplification.
Our AI Assistant can give you a hint or further elaboration if you get stuck on a question or an immediate explanation of the correct answer if you still miss the question. You can also ask it your own questions about driving.
This practice test isn’t timed; take all the time you want. You can also retake this practice test as often as you wish until you’ve mastered the material.
Driver’s Ed is - nobody wants to set foot inside the DOT. 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 WY 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 DOT.
