Practice question What is HazMat segregation? Putting all HazMat in the trailer noseMixing materials to save spaceKeeping incompatible materials apartSorting by customer name only Answer: C — Keeping incompatible materials apart The correct answer is shown above. Try the full quiz for additional practice. Practice more: Washington CDL HazMat Endorsement Test Practice Questions - Washington CDL Hazardous Materials Endorsement Test Exam →