Which statement best describes the purpose of the HM column on shipping papers?

• A. It marks entries that are hazardous materials
• B. It lists the carrier's insurance
• C. It shows the trailer number
• D. It indicates the time of shipment

Answer: (A)

The main idea here is to quickly identify shipments that contain hazardous materials. The HM column on shipping papers is there to flag entries that are hazardous materials so drivers, responders, and regulators can see at a glance that special hazmat rules apply. When HM is marked, it signals that you must reference the hazmat details on the paper—such as the proper shipping name, hazard class, UN number, packing group, and the quantity—and follow the required safety procedures, labeling, placarding, routing, and emergency response information. This helps ensure proper handling and regulatory compliance, and it marks why that entry needs additional attention beyond routine shipments. The other items listed—insurance, trailer number, and time of shipment—are not the purpose of this column and are found in different parts of the paperwork.