MS Fire Sprinklers Practice Questions - Mississippi Fire Sprinklers Contractor Examination Exam

Where piping cannot be reliably kept above freezing, which automatic sprinkler system type is the usual NFPA 13 choice?

Standard wet-pipe without heat or listed antifreeze Deluge with all open sprinklers Dry-pipe, with air or nitrogen in the piping and water held at the dry-pipe valve A pipe-schedule wet system with extra hangers

Correct Answer:

Dry-pipe, with air or nitrogen in the piping and water held at the dry-pipe valve

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