Identify sprinkler system applications and components.

Identification should include the following:

• Wet-pipe system—an alarm-check valve or backflow-prevention valve, a pressure gauge, and an electronic alarm
• Dry-pipe system—an air-pressure gauge located above a clapper and a water-pressure gauge below a clapper
• Pre-action system—a deluge-type valve, fire-detection devices, and closed sprinklers
• Deluge system—open sprinkler heads with a deluge valve
• Residential system—fast-response sprinklers tied into wet or dry systems, air- or water-pressure gauges, a flow detector, and a system drain

Process/Skill Questions:

• Where might dry-pipe systems be found?
• What are the benefits of using a deluge system?
• What are closed sprinklers, and how do they operate?