S12 FDNY COMPREHENSIVE EXAMS SET TESTED QUESTIONS WITH ACCURATE ANSWERS

S12 FDNY COMPREHENSIVE EXAMS SET
TESTED QUESTIONS WITH ACCURATE
ANSWERS AND DETAILED RATIONALES
GRADED A+

⩥ Sprinkler system with open heads.
Answer: Deluge system


⩥ Freezing point of antifreeze solutions.
Answer: Hydrometer or refractometer


⩥ Color required for sprinkler and standpipe risers per local law
58/2009.
Answer: Yellow


⩥ Distance for hanger assembly to center line of an upright sprinkler
head.
Answer: 3 inches


⩥ Location of the automatic ball drip.
Answer: Between lower check valve and fire department connection

,⩥ Purpose of a ball drip.
Answer: To prevent freezing in the line


⩥ Build up of foreign matter on a sprinkler head.
Answer: Loading


⩥ When a sprinkler head opens.
Answer: It is said to be fused


⩥ Minimum air pressure inside a pressure tank.
Answer: 75 psi


⩥ Height a gravity tank should be above highest sprinkler heads it
supplies.
Answer: 25 feet


⩥ Frequency for replacing gauges.
Answer: Every 5 years


⩥ Number of spare sprinkler heads required when under 300 sprinklers.
Answer: 6

, ⩥ Number of spare sprinkler heads required when there are 300 to 1000
sprinklers.
Answer: 12


⩥ Number of spare sprinkler heads required when there are over 1000
sprinklers.
Answer: 24


⩥ Year all sprinklers prior to which shall be replaced.
Answer: 1920


⩥ GPM at which house pumps fill the gravity tank.
Answer: 65 gpm


⩥ Spray pattern of a sprinkler 3 feet below the sprinkler head deflector.
Answer: 16 feet at 15 gpm


⩥ Notification time to FDNY for an out of service condition.
Answer: 8 hours


⩥ Who must draw a hand drawn sketch of the compactor system.
Answer: Certificate of fitness holder