Which sprinkler system type is NOT among the standard types listed?

Which sprinkler system type is NOT among the standard types listed?

• A. Wet-pipe
• B. Water-mist
• C. Deluge
• D. Dry-pipe

Answer: (B)

Standard automatic sprinkler systems are typically grouped into wet-pipe, dry-pipe, and deluge. Water-mist sits outside these traditional categories; it’s a separate class of fire suppression that uses fine water sprays rather than the conventional sprinkler heads and piping arrangements. Because it operates with a different physics approach—smaller droplets, different distribution, and distinct design and code requirements—it’s not considered one of the standard sprinkler system types. That’s why water-mist is the correct choice for what isn’t part of the standard listed types.

Standard automatic sprinkler systems are typically grouped into wet-pipe, dry-pipe, and deluge. Water-mist sits outside these traditional categories; it’s a separate class of fire suppression that uses fine water sprays rather than the conventional sprinkler heads and piping arrangements. Because it operates with a different physics approach—smaller droplets, different distribution, and distinct design and code requirements—it’s not considered one of the standard sprinkler system types. That’s why water-mist is the correct choice for what isn’t part of the standard listed types.