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 PlansFederal Motor Carrier Safety Administration (FMCSA) regulations require commercial drivers to perform a pre-trip inspection at the beginning of their shift. This inspection covers critical safety components, including brakes, steering, lights, tires, and emergency equipment. If you find any condition likely to affect the safe operation of your vehicle, you are required to report it immediately and have the vehicle repaired before driving. Pre-trip inspections protect both you and other road users. You should master this procedure before you begin the licensing process. More details about pre-trip inspections and other important topics of commercial driving theory can be found in the official Iowa Commercial Driver’s License Manual (Iowa CDL Handbook 2026).
The official general knowledge exam consists of 50 multiple-choice questions. You must answer all questions before the timer runs out. A minimum score of 80% is required to pass, leaving little room for error. To ace this exam on your first attempt, you should train with our Iowa CDL Class B Practice Test. This practice test is available online, 24/7. You can access it anytime, anywhere in the world. All you need is a compatible device and a stable internet connection.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Questions you get wrong will be automatically added to your personal Challenge Bank™. This section includes detailed explanations and helpful insights. Turn your mistakes into learning opportunities and visit your Challenge Bank to identify areas that need improvement. Practice with the questions you previously got wrong and learn from your mistakes. Premium users can manually add any question to their Challenge Bank.
Current for January 2026, this practice test closely reflects the content and format of the official general knowledge exam. With each practice session, you improve your knowledge and gain the confidence to pass on your first attempt. Begin your licensing journey with a significant boost in your learning potential, and set yourself on the path to becoming a safe and responsible commercial driver in Iowa.
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 IA 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.
