DMV.org has Class B commercial driver's license practice exams made up of questions designed to prepare the applicant for the basics. Endorsed exams are also offered, of which applicants are refunded the fee if they are unable to pass the practice exam.
Test takers should also review and study their handbook for the exam because it is used as a reference for all rules of the road dealing with commercial drivers, notes DMV.org. There is a free seven-question test that scores the answers once submitted. However, as of May 2015, the website offers 100 questions for unlimited practice at $14.99, 50 questions for unlimited practice at $9.99 and 50 questions for a commercial license cheat sheet at $9.99. To ensure the applicant is learning and benefiting from the practice exams, if the test taker does not successfully pass, he can receive a full refund.
The commercial driver's license endorsement exam consists of three sections for test takers. Section one contains the introduction, section two is about driving safely, and section three deals with the cargo. This test costs $19.95 and can be taken anywhere with Internet access at any time of the day as there is 24/7 online access, explains DMV.org. Class B exams are for single vehicles with a gross vehicle weight rating of 26,001 pounds and vehicles towing other vehicles that do not weigh more than 10,000 pounds.