Question A person should not smoke within ____ of a vehicle placarded for Class 3 or Division 2.1 materials. Answers Five feet 25 feet 100 feet 1,000 feet Explanation Do not smoke within 25 feet of a placarded cargo tank used to transport Class 3 or Division 2.1 hazardous materials. Take a FREE Practice Test Now This questions appears in the following tests: South Carolina HazMat , District Of Columbia Tank , Oregon Tank ,