FDNY S-12 Questions with Detailed Verified Answers

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FDNY S-12 Questions with Detailed
Verified Answers


Question: what is the minimum size of threaded rod required for
sprinkler piping?

⼀Answer:⼀ 3/8 inch


Question: how often are fire department connections hydro-
statically tested?

⼀Answer:⼀ every 5 years


Question: sprinkler heads exposed to corrosive conditions are
covered with what?

⼀Answer:⼀ wax or lead


Question: automatic sprinkler systems have what color caps on the
fire department connections?

⼀Answer:⼀ green


Question: non automatic sprinkler systems have what color caps on
the fire department connections?

⼀Answer:⼀ silver

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Question: in a pressurized tank the water toair ratio is what

⼀Answer:⼀ 2 to 1 which means 2 parts water to 1 part air which

also means 66.33% water and 33.67%air


Question: sprinkler heads are factory tested at what psi?

⼀Answer:⼀ 400


Question: inspection records are maintained on site for how long?

⼀Answer:⼀ 3 years


Question: underwriters labs and factory mutual are what?

⼀Answer:⼀ testing companies


Question: a quick response sprinkler has an RTI ( response time
index) of what?

⼀Answer:⼀ 50


Question: a standard sprinkler has RTI of what?

⼀Answer:⼀ 80


Question: a sprinkler system with open heads is called a?

⼀Answer:⼀ Deluge system