Which of the following is NOT a component of the four steps to hazard recognition?

• A. Background color
• B. Shipping name
• C. Hazard class number
• D. UN/NA identification number

Answer: (B)

Hazard recognition at a scene relies on visual identifiers on the container and placards to quickly classify risk and guide actions. The background color gives an at-a-glance sense of the hazard category, helping you group the material with similar dangers. The hazard class number identifies the general type of hazard (for example, flammable, toxic, corrosive), narrowing down the potential risks you must manage. The UN/NA identification number is a four-digit code that uniquely identifies the substance, which you can look up to find the exact hazards and the appropriate emergency response procedures. The shipping name, while important for paperwork, isn’t a reliable visual cue used in the hazard-recognition steps because it isn’t consistently displayed on labels/placcards and can be ambiguous or vary between shipments. Therefore, shipping name is not part of the four steps used for hazard recognition.