Which test must all applicants for a CDL pass?

Answer: B — written knowledge test

To obtain a Commercial Driver's License (CDL), all applicants are required to pass a written knowledge test. This test assesses the candidate's understanding of the rules of the road, safe driving practices, and the regulations specific to commercial driving. It ensures that the applicant possesses the necessary theoretical knowledge to operate a commercial vehicle safely and in compliance with federal and state laws. Passing the written knowledge test is crucial as it verifies that the driver is aware of various critical factors, such as vehicle operation, road signs, and regulations regarding hazardous materials if applicable. This foundational knowledge is essential for ensuring the safety of the driver, their passengers, and other road users. While other aspects such as a vision test or a skill performance test are also important in the overall licensing process, they come after passing the written test. Additionally, background checks are typically part of the application process but are not classified as a ‘test’ in the same manner as the others.