EXAM FDNY S-12: 2025/2026, WITH
CORRECT/ACCURATE ANSWERS
Personally supervised - CORRECT ANSWERS- Inspection, Testing,
servicing and other maintenance of sprinkler systems (NFPA 25,
2011)
Non-Automatic Dry Sprinkler Systems - CORRECT ANSWERS-
Water is supplied as needed through the fire department
connection.
How Many Spare Heads must be onsite - CORRECT ANSWERS- 6
Types of Non-Automatic Sprinkler Systems - CORRECT ANSWERS-
1. Perforated Pipe
2. Open fixed spray nozzles
3. External exposure sprinklers
4. Foam supply systems
Garbage Compactor Sprinkler Systems COF Responsibilities -
CORRECT ANSWERS- 1. Know Location of Sprinklers
2. Sketch of Compactor Sprinkler System
3. Sign indicating all control valves
,4. All control valves should be labeled
5. All valves shall be sealed open
6. Labels should be attached to yokes
Water Supply shut off sign - CORRECT ANSWERS- "Shutoff for
Sprinkler System Located 6 Feet form the Sign"
Waterflow Alarm Valves - CORRECT ANSWERS- The basic design
of most water-flow alarm valves is that of a check valve which lifts
from its seat when water flows into a sprinkler system. This alarm
then starts an audible signal to alert the occupants in the building
that the sprinkler system has been activated.
Vane type waterflow - CORRECT ANSWERS- Switches have a
paddle inserted inside the main supply piping perpendicular to
the direction of flow. Upon waterflow, the paddle switch transmits
an alarm. Vane type waterflow switches cannot be installed to
monitor waterflow in dry pipe sprinkler systems.
Pressure Type Waterflow - CORRECT ANSWERS- Switches
mounted on a trim line. Upon waterflow the switch transmits an
alarm. Used in dry pipe and preaction systems.
Alarm Retarding Devices - CORRECT ANSWERS- An alarm check
valve that is exposed to changing water supply pressure needs an
alarm retarding device. This is required to prevent false alarms
when the check valve clapper is lifted from its seat by a
, temporary pressure surge. Vane type water flow switches
sensitivity can also be adjusted to changing water pressures.
Spare Sprinklers Ratio - CORRECT ANSWERS- 1. Under 300 - 6
Spare
2. 301-1000 - 12 Spare
3. Over 1000 - 24 Spare
Pressure Tank Air Pressure - CORRECT ANSWERS- Maximum 75
PSI
Pressure Tank Alarms - CORRECT ANSWERS- Automatically
monitor the air-to-water volume ratio of 1 (air) : 2 (water) for low
or high pressure
Gravity Tank Supervision - CORRECT ANSWERS- These devices
send signals about water temperature and level.
Centrifugal Pump - CORRECT ANSWERS- The centrifugal fire
pump is the standard pump currently used in fire protection
systems. This is the preferred pump because it is reliable,
compact, requires low maintenance, and it can be powered by a
variety of drivers including: electric motors, internal combustion
engines, and steam turbines
Principle of Operation - CORRECT ANSWERS- The water available
to the centrifugal pump must always be under pressure because
CORRECT/ACCURATE ANSWERS
Personally supervised - CORRECT ANSWERS- Inspection, Testing,
servicing and other maintenance of sprinkler systems (NFPA 25,
2011)
Non-Automatic Dry Sprinkler Systems - CORRECT ANSWERS-
Water is supplied as needed through the fire department
connection.
How Many Spare Heads must be onsite - CORRECT ANSWERS- 6
Types of Non-Automatic Sprinkler Systems - CORRECT ANSWERS-
1. Perforated Pipe
2. Open fixed spray nozzles
3. External exposure sprinklers
4. Foam supply systems
Garbage Compactor Sprinkler Systems COF Responsibilities -
CORRECT ANSWERS- 1. Know Location of Sprinklers
2. Sketch of Compactor Sprinkler System
3. Sign indicating all control valves
,4. All control valves should be labeled
5. All valves shall be sealed open
6. Labels should be attached to yokes
Water Supply shut off sign - CORRECT ANSWERS- "Shutoff for
Sprinkler System Located 6 Feet form the Sign"
Waterflow Alarm Valves - CORRECT ANSWERS- The basic design
of most water-flow alarm valves is that of a check valve which lifts
from its seat when water flows into a sprinkler system. This alarm
then starts an audible signal to alert the occupants in the building
that the sprinkler system has been activated.
Vane type waterflow - CORRECT ANSWERS- Switches have a
paddle inserted inside the main supply piping perpendicular to
the direction of flow. Upon waterflow, the paddle switch transmits
an alarm. Vane type waterflow switches cannot be installed to
monitor waterflow in dry pipe sprinkler systems.
Pressure Type Waterflow - CORRECT ANSWERS- Switches
mounted on a trim line. Upon waterflow the switch transmits an
alarm. Used in dry pipe and preaction systems.
Alarm Retarding Devices - CORRECT ANSWERS- An alarm check
valve that is exposed to changing water supply pressure needs an
alarm retarding device. This is required to prevent false alarms
when the check valve clapper is lifted from its seat by a
, temporary pressure surge. Vane type water flow switches
sensitivity can also be adjusted to changing water pressures.
Spare Sprinklers Ratio - CORRECT ANSWERS- 1. Under 300 - 6
Spare
2. 301-1000 - 12 Spare
3. Over 1000 - 24 Spare
Pressure Tank Air Pressure - CORRECT ANSWERS- Maximum 75
PSI
Pressure Tank Alarms - CORRECT ANSWERS- Automatically
monitor the air-to-water volume ratio of 1 (air) : 2 (water) for low
or high pressure
Gravity Tank Supervision - CORRECT ANSWERS- These devices
send signals about water temperature and level.
Centrifugal Pump - CORRECT ANSWERS- The centrifugal fire
pump is the standard pump currently used in fire protection
systems. This is the preferred pump because it is reliable,
compact, requires low maintenance, and it can be powered by a
variety of drivers including: electric motors, internal combustion
engines, and steam turbines
Principle of Operation - CORRECT ANSWERS- The water available
to the centrifugal pump must always be under pressure because
