When is a chemical fire extinguisher system needed?

• A. For electrical fires only
• B. In all areas with plumbing
• C. Where water is not sufficient
• D. In areas with high humidity

Answer: (C)

Non-water fire suppression is chosen when water cannot safely or effectively control the fire. In refrigeration work, fires often involve electrical equipment or materials where using water could cause short circuits, spread the fire, or damage sensitive components. A chemical extinguishing system provides a non-water method to suppress the fire, making it the right choice where water is not sufficient to handle the hazard. The other factors listed don’t define the need for a chemical system—electrical fires aren’t limited to any plumbing area, and humidity alone doesn’t determine the requirement.