Which of the following is listed as one of the six sprinkler system types?

Which of the following is listed as one of the six sprinkler system types?

• A. Air-pressurized
• B. Hybrid pipe
• C. Conventional
• D. Wet pipe

Answer: (D)

Sprinkler systems are classified by how water is stored and released into the piping. The recognized type in this list is wet pipe, where the piping network is filled with water and connected directly to the supply so that when a sprinkler head is heated and opens, water is discharged immediately through that head. This setup provides fast response and simpler design. The other options don’t correspond to standard named categories: air-pressurized isn’t a standalone system type (in practice, some systems use air to hold back water in dry pipes, but that’s not called an air-pressurized system); conventional isn’t a formal sprinkler system category; hybrid pipe isn’t a standard named type. So wet pipe is the correct choice.

Sprinkler systems are classified by how water is stored and released into the piping. The recognized type in this list is wet pipe, where the piping network is filled with water and connected directly to the supply so that when a sprinkler head is heated and opens, water is discharged immediately through that head. This setup provides fast response and simpler design. The other options don’t correspond to standard named categories: air-pressurized isn’t a standalone system type (in practice, some systems use air to hold back water in dry pipes, but that’s not called an air-pressurized system); conventional isn’t a formal sprinkler system category; hybrid pipe isn’t a standard named type. So wet pipe is the correct choice.