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FDNY S-12 Questions and Answers (Expert
Solutions)
Q: what is the minimum size of threaded rod required for sprinkler piping? ANS 🗹🗹:
3/8 inch
Q: how often are fire department connections hydro-statically tested? ANS 🗹🗹: every 5
years
Q: sprinkler heads exposed to corrosive conditions are covered with what? ANS 🗹🗹:
wax or lead
Q: automatic sprinkler systems have what color caps on the fire department
connections? ANS 🗹🗹: green
Q: non automatic sprinkler systems have what color caps on the fire department
connections? ANS 🗹🗹: silver
Q: in a pressurized tank the water toair ratio is what ANS 🗹🗹: 2 to 1 which means 2
parts water to 1 part air which also means 66.33% water and 33.67%air
Q: sprinkler heads are factory tested at what psi? ANS 🗹🗹: 400
Q: inspection records are maintained on site for how long? ANS 🗹🗹: 3 years
Q: underwriters labs and factory mutual are what? ANS 🗹🗹: testing companies
Q: a quick response sprinkler has an RTI ( response time index) of what? ANS 🗹🗹: 50
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Q: a standard sprinkler has RTI of what? ANS 🗹🗹: 80
Q: a sprinkler system with open heads is called a? ANS 🗹🗹: Deluge system
Q: the freezing point if ant freeze solutions is measured by what? ANS 🗹🗹: hydrometer
or refractometer
Q: local law 58/2009 requires sprinkler and stand pipe risers to be painted what color?
ANS 🗹🗹: yellow
Q: the distance for the hanger assembly to the center line of an upright sprinkler head
should be? ANS 🗹🗹: 3 inches
Q: the automatic ball drip is located where? ANS 🗹🗹: Between lower check valve and
fire department connection
Q: what is the purpose of a ball drip? ANS 🗹🗹: to prevent freezing in the line
Q: the build up of foreign matter on a sprinkler head is called? ANS 🗹🗹: loading
Q: when a sprinkler head opens it is said to? ANS 🗹🗹: be fused
Q: the minimum air pressure inside a pressure tank is? ANS 🗹🗹: 75 psi
Q: a gravity tank should be atlas how many feet above the highest sprinkler heads it
supplies? ANS 🗹🗹: 25 feet
Q: gauges are to be replaced every? ANS 🗹🗹: 5 years
Q: how many spare sprinkler heads are to be on hand when under 300 sprinklers? ANS
🗹🗹: 6
FDNY S-12 Questions and Answers (Expert
Solutions)
Q: what is the minimum size of threaded rod required for sprinkler piping? ANS 🗹🗹:
3/8 inch
Q: how often are fire department connections hydro-statically tested? ANS 🗹🗹: every 5
years
Q: sprinkler heads exposed to corrosive conditions are covered with what? ANS 🗹🗹:
wax or lead
Q: automatic sprinkler systems have what color caps on the fire department
connections? ANS 🗹🗹: green
Q: non automatic sprinkler systems have what color caps on the fire department
connections? ANS 🗹🗹: silver
Q: in a pressurized tank the water toair ratio is what ANS 🗹🗹: 2 to 1 which means 2
parts water to 1 part air which also means 66.33% water and 33.67%air
Q: sprinkler heads are factory tested at what psi? ANS 🗹🗹: 400
Q: inspection records are maintained on site for how long? ANS 🗹🗹: 3 years
Q: underwriters labs and factory mutual are what? ANS 🗹🗹: testing companies
Q: a quick response sprinkler has an RTI ( response time index) of what? ANS 🗹🗹: 50
, Page | 2
Q: a standard sprinkler has RTI of what? ANS 🗹🗹: 80
Q: a sprinkler system with open heads is called a? ANS 🗹🗹: Deluge system
Q: the freezing point if ant freeze solutions is measured by what? ANS 🗹🗹: hydrometer
or refractometer
Q: local law 58/2009 requires sprinkler and stand pipe risers to be painted what color?
ANS 🗹🗹: yellow
Q: the distance for the hanger assembly to the center line of an upright sprinkler head
should be? ANS 🗹🗹: 3 inches
Q: the automatic ball drip is located where? ANS 🗹🗹: Between lower check valve and
fire department connection
Q: what is the purpose of a ball drip? ANS 🗹🗹: to prevent freezing in the line
Q: the build up of foreign matter on a sprinkler head is called? ANS 🗹🗹: loading
Q: when a sprinkler head opens it is said to? ANS 🗹🗹: be fused
Q: the minimum air pressure inside a pressure tank is? ANS 🗹🗹: 75 psi
Q: a gravity tank should be atlas how many feet above the highest sprinkler heads it
supplies? ANS 🗹🗹: 25 feet
Q: gauges are to be replaced every? ANS 🗹🗹: 5 years
Q: how many spare sprinkler heads are to be on hand when under 300 sprinklers? ANS
🗹🗹: 6
