Question Containers of hazardous materials must be: Answers Brightly-colored. Braced to prevent movement during transportation. Made of cardboard. Explanation Containers of hazardous materials should be braced so they will not fall, slide, or bounce around during transportation. Take a FREE Practice Test Now This questions appears in the following tests: Arizona HazMat , California HazMat , Connecticut HazMat , Hawaii HazMat , Maine HazMat , Michigan HazMat , New Mexico HazMat , Rhode Island HazMat , Vermont HazMat , Washington HazMat ,