Question The three-time fail rule means: Answers An applicant who fails any exam three times is required to wait 30 days before retaking the exam. An applicant who fails any exam three times is prevented from ever taking the test again. An applicant who fails any exam three times is required to take a test for a different CDL class. An applicant who fails any exam three times must take a class before taking the exam again. Explanation An applicant who fails any particular CDL test three times must wait 30 days from the date of the third failed test before taking that same test again. This questions appears in the following tests: Illinois Class A Knowledge Test