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Oklahoma! Where the wind comes sweeping down the plain! If you are interested in earning your Class A Commercial Driver’s License (CDL), you’ve come to the right place! There are several steps involved in obtaining this license, and one of them is passing the Combination Vehicles Knowledge Test. This multiple-choice test includes 20 questions, and you’ll need to answer at least 80% correctly to pass. If you don’t pass on your first try, you’ll need to wait at least one business day and may have to pay a retest fee. Nobody wants that, so our experts have crafted a series of practice tests to provide you with all you’ll need to pass the official exam on your first try!
Chief Educational Researcher, Driving‑Tests.org (ACES member)
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Our Free Oklahoma CDL Combination Practice Tests mirror the official exam and are based on the Oklahoma CDL Manual, which is the primary resource for the test material. Each response from our practice tests gives you instant feedback and explanations that make studying efficient, instead of guessing until the end and then receiving feedback. Our tools have helped countless Oklahomans pass on their first attempt. Once you have mastered this practice test, try another here: https://driving-tests.org/oklahoma/ok-cdl-combination-test/.
You’ll be tested on how to handle combination vehicles, including coupling and uncoupling procedures, air-brake use and inspection, driving safety, avoiding jackknives, skid prevention, and inspection procedures. That’s quite a bit of material, but our practice tests make learning an Oklahoma breeze!
Interstates 35, 40, and 44 link Tulsa, Oklahoma City, and points throughout the state, providing the infrastructure to support industries like energy, agriculture, logistics, and manufacturing. With a Class A CDL, you can take combination vehicle-required jobs at companies like FedEx Freight, Hiland Dairy, Love’s Travel Stops, and UPS.
You must also complete Entry-Level Driver Training (ELDT) through an FMCSA-approved provider. Additionally, you must pass the CDL General Knowledge Exam and obtain and hold a Commercial Learner’s Permit (CLP) for a minimum of 14 days, after which you can schedule your behind-the-wheel Skills Test (in a combination vehicle). Yes, there is a lot to take care of to obtain the Class A CDL, but our series is here to guide you along the way.
Because most tractor-trailers use air brakes, you’ll also want to prepare for the Air Brakes Knowledge Test to remove any air brake restriction from your license. We also offer practice tests for Oklahoma endorsements like Hazardous Materials and Double/Triple Trailers, each adding more job options to your career. Check one out here: https://driving-tests.org/oklahoma/ok-cdl-hazmat-practice-test/.
Start strong, study with our practice tests, and keep rolling forward. You’ll be glad you did!
Driver’s Ed is - nobody wants to set foot inside the DPS. 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 2025 OK 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 DPS.
