Fixed systems in hazard areas are designed to protect against which of the following?

Fixed systems in hazard areas are specifically designed to protect against Class B fires, which involve flammable liquids and gases, such as oil, gasoline, and solvents. These types of fires require specialized extinguishing agents that can effectively suppress burning liquids without causing them to spread or re-ignite.

Common extinguishing agents used in fixed systems for Class B fires include foam, dry chemical, and CO2, which are specifically formulated to tackle the unique challenges posed by flammable liquids. Understanding the different classes of fire is critical in selecting the appropriate fire suppression method and system.

Class A fires involve ordinary combustibles like wood and paper, Class C fires are associated with electrical equipment, and Class D fires involve combustible metals, each requiring different fire protection strategies. This distinction highlights the importance of matching the fire suppression system to the specific risks present in a given area.