Which sign is required to address ignition risks in blasting safety zones?

• A. No Smoking or No Open Flames Signs
• B. Exit Signs
• C. Hearing Protection Signs
• D. Caution Wet Floor

Answer: (A)

Controlling ignition sources is essential in blasting safety zones. Smoldering materials, cigarettes, or any open flames can ignite explosives or blasting agents, so clearly prohibiting smoking and open flames in the blast area directly reduces the risk of a dangerous initiation. A No Smoking or No Open Flames sign communicates that restriction to all workers, helping ensure the area remains free of ignition sources during blasting operations. The other signs address unrelated hazards: Exit signs guide evacuation, Hearing Protection signs relate to noise, and Caution Wet Floor signs warn of slipping. None of those reduce ignition risk in blasting zones like this sign does.