Fire sprinkler systems question with complete solution 2023 graded A+

Fire sprinkler systems question with complete solution 2023 graded A+Preauction sprinkler system - correct answer admits water to sprinkler pipes after the system detects fire good for use in places where the sprinklers are only necessary when there is an actual fire so other items in the building do not get water damage from an accidental sprinkling. Such buildings include libraries and data centers. These places contain items of high value like electronics and goods damageable by water such as books Wet pipe - correct answer activated by fusible link or other heat sensative. Good for unheated buildings. Most common. Cant be installed where temps are below 40 degrees. deluge system - correct answer Filled w/ water--all heads discharge at same time. Used where flamable materials are stored. Dry pipe - correct answer Can have delay of 60 seconds. Uses pressurized air or nitrogen. Use in warehouses, freezers and loading docks.