S12 FDNY EXAM (LATEST 2023/
2024 UPDATE) EXAM WITH
ACTUAL VERIFIED NGN
QUESTIONS AND WELL
EXPLAINED 100%
CORRECT ANSWERS WITH
RATIONALES LATEST 2025
UPDATE GRADED A+ WITH 100%
GUARANTEED SUCCESS AFTER
DOWNLOAD
the build up of foreign matter on a sprinkler head is called?
loading
when a sprinkler head opens it is said to?
be fused
the minimum air pressure inside a pressure tank is?
75 psi
a gravity tank should be atlas how many feet above the highest sprinkler heads it supplies?
, 25 feet
gauges are to be replaced every?
5 years
how many spare sprinkler heads are to be on hand when under 300 sprinklers?
6
how many spare spare sprinkler heads are to be on hand when there is 300 to 1000
sprinklers?
12
how many spare sprinkler heads are to be on hand when there is over 1000 sprinklers?
24
all sprinklers prior to what date shall be replaced?
1920
house pumps fill the gravity tank at what gpm?
65 gpm
3 feet below the sprinkler head deflector the spray pattern of a sprinkler is ?
16 feet at 15 gpm
FDNY must be notified for an out of service condition if the system is going to be out for
how long?
8 hours
a hand drawn sketch of the compactor system must be drawn by who?
certificate of fitness holder
a pre action valve prevents what from entering the system ?
water
Pipe hangars 4 inches and smaller require what size threaded rod?
3/8 inch
Pipe hangars that are 5, 6, and 8 inch pipe require what size threaded rod?
1/2 inch
Pipe hangars for 10 and 12 inch pipe require what size threaded rod?
5/8 inch
what is the minimum size of threaded rod required for sprinkler piping?
3/8 inch
2024 UPDATE) EXAM WITH
ACTUAL VERIFIED NGN
QUESTIONS AND WELL
EXPLAINED 100%
CORRECT ANSWERS WITH
RATIONALES LATEST 2025
UPDATE GRADED A+ WITH 100%
GUARANTEED SUCCESS AFTER
DOWNLOAD
the build up of foreign matter on a sprinkler head is called?
loading
when a sprinkler head opens it is said to?
be fused
the minimum air pressure inside a pressure tank is?
75 psi
a gravity tank should be atlas how many feet above the highest sprinkler heads it supplies?
, 25 feet
gauges are to be replaced every?
5 years
how many spare sprinkler heads are to be on hand when under 300 sprinklers?
6
how many spare spare sprinkler heads are to be on hand when there is 300 to 1000
sprinklers?
12
how many spare sprinkler heads are to be on hand when there is over 1000 sprinklers?
24
all sprinklers prior to what date shall be replaced?
1920
house pumps fill the gravity tank at what gpm?
65 gpm
3 feet below the sprinkler head deflector the spray pattern of a sprinkler is ?
16 feet at 15 gpm
FDNY must be notified for an out of service condition if the system is going to be out for
how long?
8 hours
a hand drawn sketch of the compactor system must be drawn by who?
certificate of fitness holder
a pre action valve prevents what from entering the system ?
water
Pipe hangars 4 inches and smaller require what size threaded rod?
3/8 inch
Pipe hangars that are 5, 6, and 8 inch pipe require what size threaded rod?
1/2 inch
Pipe hangars for 10 and 12 inch pipe require what size threaded rod?
5/8 inch
what is the minimum size of threaded rod required for sprinkler piping?
3/8 inch
