Which action is correct if you are unsure about the fire class?

• A. Use an extinguisher immediately.
• B. Evacuate and call emergency services; do not use an extinguisher.
• C. Ignore and continue working.
• D. Post a notice and wait.

Answer: (B)

When you’re unsure about the fire class, the safest move is to evacuate and call emergency services and not try to fight the fire with an extinguisher. Extinguishing agents are chosen for specific fire types, and using the wrong one can make the fire worse, cause dangerous reactions, or put you at risk from heat, fumes, or electrical hazards. By evacuating, you protect yourself and others, keep escape routes clear, and ensure trained responders arrive promptly to handle the situation. That’s why this option is the best choice. Choosing to fight the fire without knowing the class can be unsafe, ignoring it won’t help, and posting a notice while waiting doesn’t address the emergency.