Which statement about sprinkler temperature ratings is correct?

Which statement about sprinkler temperature ratings is correct?

• A. Roof-level sprinklers must be rated 250F to 300F and intermediate-level sprinklers 135F to 170F unless ambient conditions require higher
• B. Roof-level sprinklers must be rated 200F to 250F and intermediate-level 250F to 300F
• C. All sprinklers must be rated 135F to 170F
• D. Roof-level sprinklers must be rated under 100F

Answer: (A)

The main idea is that sprinkler temperature ratings are chosen based on where the sprinkler is installed and how much heat it is likely to encounter. Roof-level sprinklers are exposed to higher ambient temperatures thanks to sun and radiant roof heat, so they use a higher temperature rating to avoid activating too early from environmental heat while still operating reliably in a real fire. The typical approach is to place roof-level sprinklers in the 250°F to 300°F range, while intermediate-level sprinklers can use the lower 135°F to 170°F range, with the option to raise any rating if ambient conditions dictate it. This balance helps prevent nuisance activations from heat in cool areas while ensuring prompt response when a fire occurs. The other statements aren’t correct because they mix up the location-based logic (swapping roof and intermediate ratings), propose the same rating for all sprinklers, or set a roof-level rating that’s unrealistically low for exposed locations.

The main idea is that sprinkler temperature ratings are chosen based on where the sprinkler is installed and how much heat it is likely to encounter. Roof-level sprinklers are exposed to higher ambient temperatures thanks to sun and radiant roof heat, so they use a higher temperature rating to avoid activating too early from environmental heat while still operating reliably in a real fire. The typical approach is to place roof-level sprinklers in the 250°F to 300°F range, while intermediate-level sprinklers can use the lower 135°F to 170°F range, with the option to raise any rating if ambient conditions dictate it. This balance helps prevent nuisance activations from heat in cool areas while ensuring prompt response when a fire occurs.

The other statements aren’t correct because they mix up the location-based logic (swapping roof and intermediate ratings), propose the same rating for all sprinklers, or set a roof-level rating that’s unrealistically low for exposed locations.