NFPA 16: Standard for the Installation of Foam-Water Sprinkler and Spray Systems Practice Test

Aircraft hangar fire protection needs are specialized because of large open spaces and the presence of aircraft fuels. The standard that specifically addresses water supplies for aircraft hangers is NFPA 409, which lays out the design criteria and water supply requirements unique to hangar protection systems. This makes NFPA 409 the appropriate reference for hangar water supplies.

In contrast, NFPA 13 covers general sprinkler design for most occupancies, NFPA 25 focuses on inspection and maintenance of water-based systems, and NFPA 30 deals with flammable liquids handling and storage. These do not provide the hangar-specific water supply criteria, so they’re not the correct reference for this scenario.