Final answer:
The category of fire suppression systems not mentioned in the options is the wet chemical system. Water sprinkler, dry chemical, and clean agent systems are other types of fire suppression systems commonly used.
Step-by-step explanation:
The wet chemical fire suppression system is not included among the listed options. Water sprinkler systems are commonly used in buildings and facilities to suppress fires by spraying water onto the fire to extinguish it. Dry chemical systems, on the other hand, use a dry chemical agent, such as monoammonium phosphate, to separate the fuel from the oxygen and extinguish the fire. Clean agent systems, like carbon dioxide or halon, use chemicals that do not leave a residue and are effective for suppressing fires in environments where water or dry chemicals may be harmful.
Lastly, the wet chemical system is specifically designed for suppressing fires that involve cooking oils and fats, commonly found in commercial kitchen settings. Wet chemical systems work by spraying a wet chemical agent that reacts with the oil or fat, creating a foam that suppresses the fire.