What is the most hazardous signal word?

• A. Severe
• B. Danger
• C. Warning
• D. Caution

Answer: (B)

Signal words on labels convey how serious a hazard is and how urgently precautions are needed. Among standard terms, Danger communicates the highest level of hazard and implies an immediate risk that could cause death or serious injury if no precautions are taken. Warning indicates a hazard that could cause injury or illness but is less severe or urgent than danger, and Caution signals a minor hazard. “Severe” isn’t a formal OSHA signal word used on labels, so it doesn’t denote an official hazard level. Because it represents the strongest warning about risk, the most hazardous signal word is Danger. For example, a label might read: Danger: Toxic vapor — fatal if inhaled, which requires immediate action and protective gear.