NV C-1B Fire Sprinklers Practice Questions - Nevada C-1B Fire Sprinklers Contractor Examination Exam

What is the defining feature of a wet-pipe sprinkler system under NFPA 13 (2007)?

Water is in the piping at all times, and each sprinkler opens independently when heated Air or nitrogen fills the piping until a dry-pipe valve trips All sprinklers are open and water waits at a deluge valve Water is admitted only after a separate detection system and a sprinkler both operate

Correct Answer:

Water is in the piping at all times, and each sprinkler opens independently when heated

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