Question Containers of hazardous materials must be: Answers Packed in brown-colored containers. Braced to prevent movement during transportation. Made of cardboard. Made of wood. Explanation Brace containers so they will not fall, slide, or bounce around during transportation. All hazardous materials packages must be secured. Take a FREE Practice Test Now This questions appears in the following tests: Massachusetts HazMat , New Jersey HazMat , Wyoming HazMat ,