Which are types of fixed fire extinguishing systems?

• A. Automatic sprinkler systems, foam systems, and chemical systems
• B. Automatic sprinkler systems, factory mutual systems, and UL listed systems
• C. Wet sprinkler systems, dry sprinkler systems and deluge systems
• D. Water sprinkler systems, flooding sprinkler systems, and chemical sprinkler systems

Answer: (A)

Fixed fire extinguishing systems are permanent installations designed to release an extinguishing agent automatically. The best choice shows three distinct technologies used as fixed systems: automatic sprinkler systems deliver water through heat-activated sprinklers; foam systems mix foam concentrate with water to blanket and cool fires, especially hydrocarbons; chemical systems use chemical agents in fixed installations for rapid knockdown, such as in electrical or sensitive equipment areas. This broad mix demonstrates the range of fixed extinguishing technologies, not just a single family of systems. The other options mix in standards or stay within subtypes of a single system family, which doesn’t illustrate the variety of fixed extinguishing technologies.