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 | => | 17% |
| 80-89 | => | 58% |
| 70-79 | => | 17% |
| 60-69 | => | 0% |
| <60% | => | 8% |
Boost your trucking career in Iowa by adding the Hazardous Materials (HazMat) endorsement to your CDL. This certification opens the door to higher-paying jobs, steady demand, and a wider range of opportunities across the Hawkeye State. Employers value drivers with the HazMat endorsement, who can legally transport dangerous cargo that the federal government has deemed hazardous. Examples are fuel, chemicals, and certain agricultural products. And that added value can mean higher pay for you!
Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
In Iowa, HazMat drivers are in demand in multiple industries. Iowa is a leader in corn, soybeans, and livestock production as well as biofuels, food processing, and manufacturing. Companies like CF Industries (Sergeant Bluff), Ag Partners (Albert City), POET Bioprocessing, and Casey’s General Stores (headquartered in Ankeny) rely on certified drivers to move products safely. Common hazardous cargoes in Iowa include anhydrous ammonia, petroleum products, ethanol and biodiesel, pesticides, and industrial chemicals. These are just some of the added opportunities you’ll have access to with a HazMat endorsement.
To earn the endorsement, you must first complete all Entry-Level Driver Training (ELDT) requirements. Once that requirement is satisfied, there are two major steps remaining: a TSA fingerprinting and background check, and passing the Iowa DOT HazMat Knowledge Test. The TSA results can take weeks, so it’s best to submit your paperwork immediately and use that waiting period to prepare for the knowledge test, which is based on Iowa (Iowa CDL Handbook 2025). The exam includes 30 questions and requires a minimum passing score of 80% (at least 24 correct answers). It covers federal regulations, proper handling and packaging of hazardous materials, labeling, quantity limits, and safe transport procedures.
To make studying easier, we’ve created Iowa-specific practice tests that mirror the official exam and cut out unnecessary information you’ll find in other study resources. This practice test is just one of several that we offer. Check out another from our Iowa-specific series here: Iowa CDL HazMat Practice Test.
After passing the TSA background check, you’ll bring your documents to the Iowa DOT, pay the required fees, and complete the exam.
The HazMat endorsement is one of the smartest investments you can make in your trucking career. While you’re at it, you should consider adding other valuable endorsements to your CDL. Check out our entire series of Iowa specific practice tests, including general CDL tests, Air Brakes restriction removal tests (Iowa CDL Air Brakes Test), and additional endorsements!
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 2025 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.
