Flammable liquid (Class 3) labels and placards have a red background. The color coding system helps quickly identify the hazard class of the material during transport and in emergencies.
The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.
This question is from the HazMat Endorsement Test #2 section. Practice with more questions from this category to build confidence before taking the official DMV test.
Browse All Free CDL Practice Tests →