NFPA 96 17A Class K Fire Protection Practice Test

Unmaintained grease buildup creates a real fire hazard and can weaken the protection system that cleans and vents the kitchen space. Grease is highly flammable, so when it accumulates on hoods, filters, and inside ductwork, a heat source or a small spark can ignite it. Once burning, flames can travel through the ductwork and spread quickly to other areas. The grease also restricts airflow, making the exhaust system work harder, which can overheat components, reduce overall ventilation efficiency, and potentially impair the performance of any automatic extinguishing or detection devices tied to the system. Because of these dangers, neglecting grease removal increases both the chance of a kitchen fire and the likelihood that the safety system won’t function as designed. The other options imply benefits that grease buildup does not provide, so they don’t fit the reality of the risk.