Practice question

Which statement is true about illegal drug use and CMV driving?

  1. It is prohibited and can disqualify a CDL driver
  2. It is allowed off duty with no consequences
  3. It is allowed if the route is intrastate
  4. It only matters for passenger endorsements

Answer: A — It is prohibited and can disqualify a CDL driver

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Missouri CDL General Knowledge Practice Questions - Missouri Commercial Driver License General Knowledge Test Exam →