Welcome to our FREE Iowa CDL practice test! And we really mean FREE. Free from fees, from sign ups, and from logins. The only thing you have to pay is attention. We make that easy, too. All of the information you need to study is formatted into 20 question tests with multiple-choice answers. Results are clearly displayed and corrected answers are plainly explained. The more you practice here the better idea you will have of your performance at your local DMV. “Like” us, tweet about us, and tell everyone you know about this easy-to-use study tool.