What hazard class placard should a tractor trailer hauling gasoline display?

• A. Red, 1
• B. Red, 2
• C. Red, 3
• D. Red, 4

Answer: (C)

The correct placard for a tractor trailer hauling gasoline is associated with flammable liquids, which fall under hazard class 3. Gasoline is a highly flammable liquid, and the visual representation for this hazard class is a red placard displaying the number 3. The red color indicates flammability, and the number specifically designates it as a flammable liquid hazard. This is crucial for ensuring safety during transport, as it communicates the nature of the hazard to emergency responders and others who may come in contact with the vehicle or its cargo.

Maintaining correct placarding helps to prevent accidents and ensures that the proper precautions are taken when handling the vehicle. This is aligned with federal regulations regarding the safe transportation of hazardous materials, which require accurate placarding to alert others to the type of hazard present.