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Response Time Index (RTI) is a value applicable to
Suggested Answer: C
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Response Time Index (RTI) is a measure of thermal sensitivity of a sprinkler's activation. It indicates how quickly the sprinkler responds to the heat from a fire. RTI is calculated by using the operating time, operating temperature, air temperature, air velocity, and conductivity factor of the sprinkler. RTI is independent of the gas velocity but depends on the properties of the sprinkler head such as mass, specific heat capacity and surface area of the thermal sensing element. RTI is used to classify sprinklers into fast response or standard response categories.
4 comments · newest first
SH
Sharika
38 minutes ago
I vaguely recall that RTI is important for dry pipe systems, but I can't remember if that means it's B or D. This is tricky!
EI
Eileen
5 days ago
I practiced a similar question about sprinkler systems, and I feel like RTI has to do with thermal sensitivity, which makes me think of option C again.
MI
Miesha
10 days ago
I'm not entirely sure, but I remember something about RTI being linked to the response time of water delivery. Maybe it's A?
DA
Daron
16 days ago
I think RTI relates to how quickly a sprinkler activates, so I might lean towards option C.