What fire symbol must be posted on the front door of the Egress section when explosives are stored?

• A. Highest Class/Division Being Stored in That Location
• B. Flammable Materials
• C. No Smoking
• D. Explosive Hazard

Answer: (D)

The key idea is that storage areas for explosives must clearly display a sign that communicates the specific hazard present. This helps everyone recognize the risk quickly and take appropriate precautions to prevent ignition or detonation, and it guides emergency responders on what they’re entering.

The correct sign to post is the Explosive Hazard sign. It directly communicates that the contents are explosives and pose a potential detonation risk, so people know to avoid ignition sources, ensure proper ventilation and handling, and follow strict safety protocols. This sign conveys the precise hazard type, which is essential for safe access and response.

Other signs are not as effective here because they either convey a broader or different message (such as a general classification, a no-smoking rule, or a generic flammable-material warning) and do not explicitly communicate the specific explosive hazard present.