To earn a Commercial Driver’s License (CDL), applicants must pass the General Knowledge Exam and the CDL skills test, which includes a pre-trip inspection, basic vehicle control, and on-road driving. The General Knowledge Exam is required to obtain a Commercial Learner’s Permit (CLP), which will remain valid for 180 days (with one allowed renewal). Failing the General Knowledge exam results in a one-day waiting period and an additional fee before retesting.
With a CLP, drivers are allowed supervised commercial driving practice in preparation for the CDL skills tests. You will face pre-trip inspection questions on the initial General Knowledge Exam and the hands-on skills test. This federally mandated test (regulated under 49 CFR § 392.7 and 49 CFR § 396.13) ensures drivers can identify and evaluate critical vehicle components to prevent breakdowns and accidents. Of the three parts of the skills test, you are required to retake any failed portion but are given credit for any parts you passed. This credit lasts until your CLP expires. Until you pass all three parts within the CLP’s validity period, you cannot obtain a CDL.