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 Plans| 90-100 | => | 11% |
| 80-89 | => | 44% |
| 70-79 | => | 33% |
| 60-69 | => | 11% |
| <60% | => | 0% |
Driving combination vehicles such as tractor-trailers on Idaho highways requires passing the Idaho Combination Vehicles Knowledge Test. By no means is this the only requirement. There are several steps for obtaining the necessary Class A Commercial Driver’s License (CDL). You’ve come to the right place to prepare for that part of the process!
You’ll need to complete all Entry-Level Driver Training (ELDT) through an FMCSA-approved provider listed on the Training Provider Registry (TPR). Then you’ll need to pass the CDL General Knowledge Test to obtain your Commercial Learner’s Permit (CLP), and hold that permit for a minimum of 14 days before taking the behind-the-wheel skills test. That’s quite a list of steps, but don’t worry! Our practice tests will guide you along the way.
The Idaho Combination Vehicles Knowledge Test contains 20 multiple-choice questions, and you must correctly answer at least 16 (80%) to pass. Idaho DMV rules require you to wait at least one business day and pay a retesting fee per attempt if you fail. Let’s make sure that doesn’t happen!
Our Free Idaho CDL Combination Practice Test is the perfect tool for passing the official test! It mirrors the official test format and is based on the latest Idaho Commercial Driver’s License Manual (Idaho CDL Handbook 2025). Each practice question includes instant feedback to speed learning. Study topics include safe driving practices for tractor-trailers, preventing trailer skids and jackknives, air brake systems for combination vehicles, proper coupling and uncoupling procedures, and inspection requirements – all the topics needed for the official exam! Once you’ve mastered this practice test, check out another one here: https://driving-tests.org/idaho/id-cdl-combination-test/.
Obtaining the Class A license expands your employment opportunities in industries including agriculture and livestock hauling, timber and forestry transport, construction and heavy equipment logistics, and long-haul freight. Major Idaho employers hiring Class A drivers include Swift Transportation, Lamb Weston, Challenger Pallet & Supply, and FedEx Freight. These are just drops in the bucket when compared to the state-wide list of opportunities!
You’ll also need to pass the CDL Air Brakes Test to drive combination vehicles, as the vast majority of them are air brake-equipped. Without passing that test, your CDL will carry an air-brake restriction (making the Class A virtually worthless). Be sure to check out our series of Air Brakes Practice Tests here: https://driving-tests.org/idaho/id-cdl-air-brake-practice-test/.
With our Idaho practice tests, you’ll be well-prepared to pass every exam and begin your career driving combination vehicles across the Gem State.
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 2025 ID 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.
