S12 FDNY Exam Questions & Answers Test QUESTIONS AND VERIFIED
SOLUTIONS |2026| ELABORATED &DETAILED ANSWERS!!
RTI of a standard sprinkler - (ANSWER)80
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
, S12 FDNY Exam Questions & Answers Test QUESTIONS AND VERIFIED
SOLUTIONS |2026| ELABORATED &DETAILED ANSWERS!!
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
What a pre-action valve prevents from entering the system - (ANSWER)Water
Size of threaded rod required for pipe hangars 4 inches and smaller - (ANSWER)3/8 inch
Size of threaded rod required for pipe hangars 5, 6, and 8 inch - (ANSWER)1/2 inch
Size of threaded rod required for pipe hangars for 10 and 12 inch - (ANSWER)5/8 inch
SOLUTIONS |2026| ELABORATED &DETAILED ANSWERS!!
RTI of a standard sprinkler - (ANSWER)80
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
, S12 FDNY Exam Questions & Answers Test QUESTIONS AND VERIFIED
SOLUTIONS |2026| ELABORATED &DETAILED ANSWERS!!
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
What a pre-action valve prevents from entering the system - (ANSWER)Water
Size of threaded rod required for pipe hangars 4 inches and smaller - (ANSWER)3/8 inch
Size of threaded rod required for pipe hangars 5, 6, and 8 inch - (ANSWER)1/2 inch
Size of threaded rod required for pipe hangars for 10 and 12 inch - (ANSWER)5/8 inch
