Comprehensive and Detailed Step-by-Step Explanation:
Deluge Systems:
A deluge system is a fire sprinkler system in which all sprinklers are open, and water is discharged simultaneously when activated by a separate detection system (e.g., heat or smoke detection).
Key Characteristics of a Deluge System:
Sprinkler heads are open, with no heat-sensitive element.
The piping is not pressurized with water until the detection system activates the deluge valve.
Commonly used in high-hazard areas like aircraft hangars or flammable liquid storage facilities.
Other Options Explained:
Option A (Wet-pipe system): Pipes are filled with water, and only heat-activated sprinklers discharge water.
Option B (Dry-pipe system): Pipes contain air or nitrogen; water enters after a sprinkler activates.
Option C (Preaction system): Combines elements of dry-pipe and detection systems but does not discharge from all open sprinklers.
Summary:
A deluge system discharges water from open sprinklers activated by a detection system.