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 | => | 13% |
| 80-89 | => | 63% |
| 70-79 | => | 13% |
| 60-69 | => | 0% |
| <60% | => | 13% |
The official Commercial Driver’s License Manual (Idaho CDL Handbook 2025) is a comprehensive resource published by the Department of Motor Vehicles (DMV). It describes the various aspects of commercial driving theory in detail, including pre-trip inspections, hours of service regulations, emergency situations, and the licensing process. You should read its contents multiple times during your learning phase.
If you intend to drive combination vehicles, pay attention to Section 6 (Combination Vehicles). This section is what the official combination vehicles knowledge exam is based on. A minimum score of 80% is required to pass, leaving little room for error. With our Idaho CDL Combination Vehicles Practice Tests, you’ll have everything you need to master this subject.
The practice test that you’re about to take is the fourth in this series. Consisting of 25 questions, this intuitive tool can make a significant difference in your learning journey. Each question has multiple answer choices, but only one is correct. You get unlimited attempts and 24/7 access to our practice tests so that you can train whenever it fits your schedule. We have implemented a user-friendly interface, making it easy for you to use this tool. You don’t need special software or advanced computer skills. Just make sure you have a stable internet connection and a compatible device, as this practice test is only accessible in a browser.
M.S., Chief Educational Researcher (ACES member)
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“Officer Frank” is your automated assistant. This AI coach will be present during your training sessions, ready to provide assistance at your request. If you get stuck on a difficult question, “Officer Frank” can rephrase it for you. Additionally, you can request hints, real-life examples, and detailed explanations that can help you understand the correct answer.
Start today and train with this practice test for several weeks. Your knowledge and confidence will gradually improve over the following weeks. You can also check out our Free Idaho CDL Permit Practice Test, which is specifically designed to help you master general commercial driving theory. Use the most efficient tools in your learning journey and make steady progress toward becoming a safe and responsible commercial driver.
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.
