Practice question A placard for a Class 4, Division 4.3 material would have what symbol? A flameA skull and crossbonesA 'W' with a line through itAn oxidizing circle Answer: A — A flame The correct answer is shown above. Try the full quiz for additional practice. Practice more: CDL HazMat Endorsement Practice Questions - Commercial Driver's License Hazardous Materials (H) Endorsement Exam →