Which two categories represent the main types of fire sprinkler systems?

The main types of fire sprinkler systems include wet pipe systems and dry pipe systems. Wet pipe systems are the most common and consist of pipes that are filled with water at all times. When a fire is detected, the heat from the flames activates the sprinkler heads, allowing water to flow directly from the pipes. This design allows for immediate response to fire situations, making it very effective for many types of buildings.

Dry pipe systems, on the other hand, contain air or nitrogen under pressure in the pipes, which keeps the water from entering the system until a fire occurs. When a temperature-sensitive sprinkler head opens due to heat, the pressure drops in the system, allowing the water to flow from the source into the pipes and out through the activated sprinkler head. This type of system is particularly useful in environments where the pipes may be subject to freezing temperatures, as it prevents water from sitting in the pipes.

Other categories listed, such as dry chemical systems and foam systems, are specialized suppression systems typically used in fire situations involving flammable liquids or chemical fires. Carbon dioxide systems and water mist systems also serve specific applications but do not fall under the traditional classifications of sprinkler systems. Standpipe systems and deluge systems represent different methods of fire suppression and are used for specific