Practice question

Hazardous materials must be identified by which of the following?

  1. Blue reflective tape on the trailer
  2. Diamond-shaped placards on all four sides of the vehicle
  3. A yellow warning light on the cab
  4. Special license plates only

Answer: B — Diamond-shaped placards on all four sides of the vehicle

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