Water mist extinguishers are described as being white and similar in construction to stored-pressure water extinguishers. Which statement is true?

Water mist extinguishers are described as being white and similar in construction to stored-pressure water extinguishers. Which statement is true?

• A. They use dry chemical powder
• B. They are white in color
• C. They are designed only for electrical fires
• D. They cannot be used outdoors

Answer: (B)

Water mist extinguishers are white in color, which helps to identify them and reflects their design lineage from stored-pressure water extinguishers. They deliver a fine mist by pressurizing water, not by releasing dry chemical powder, so they are not a powder-based system. They aren’t limited to electrical fires; they’re effective on a range of fire types, including ordinary combustibles and some liquids, when rated for those classes. They also aren’t restricted from outdoor use—outdoor use depends on the extinguisher’s rating and environmental conditions.

Water mist extinguishers are white in color, which helps to identify them and reflects their design lineage from stored-pressure water extinguishers. They deliver a fine mist by pressurizing water, not by releasing dry chemical powder, so they are not a powder-based system. They aren’t limited to electrical fires; they’re effective on a range of fire types, including ordinary combustibles and some liquids, when rated for those classes. They also aren’t restricted from outdoor use—outdoor use depends on the extinguisher’s rating and environmental conditions.