Question Containers of hazardous materials must be: Answers Packed in larger brown-colored containers. Braced to prevent movement during transportation. Made of cardboard. A maximum of four feet tall. Explanation Containers of hazardous materials must be braced so that they will not fall, slide, or bounce around during transportation. Take a FREE Practice Test Now This questions appears in the following tests: Nevada HazMat , New York HazMat , Texas HazMat , West Virginia HazMat ,