FDNY S12 Exam Questions With 100%
Correct Answers 2025 Graded A+
1. The building owner shall assign an to comply with city re-
quirements: Impairment Coordinator
2. White Disc, Red Tag: System fully out of service
3. Blue Disc, Red Tag: System partially out of service
4. Green Tag, No Disc: System free of defects and in full service
5. Glycerin solution not greater than: 50%
6. Glygol solution not greater than: 40%
7. Records shall be posted near: MAIN CONTROL VALVE
8. A connection on the exterior of a building, through which the fire depart-
ment can pump supplemental water into the sprinkler system, standpipe, or
other system. (Formally known as a Siamese connection): Fire Department
Connection
9. A valve connection on a water supply system having one or more outlets
used to supply hose and fire department connections with water: Fire Hydrant
10. Sign attached to a hydraulically calculated sprinkler system indicating the
design density, required gallons per minute and pressure for the system to
operate properly: Hydraulic Placard
11. A method of sizing automatical sprinkler systems indicating the design
density, required Gallons per min, and pressure for system to function prop-
erly: Hydraulic Calculated Systems
12. A sprinkler head with an orifice size from 3/4" - less than 1": Large Orifice
Sprinkler
13. A raised series of beams (usually steel) bearing on posts or walls to
support mechanical equipment (usually on rooftops): Dunnage
14. Hose designed to be used by trained fire fighters to combat fires beyond
the incipient stage: Attack Hose
15. A non-collapsable hose used under positive pressure having an elas-
tomeric or thermoplastic tube, a braided or spiral reinforcement, and an outer
protective cover: Booster Hose
16. A hose with a jacket covered and lined with synthetic rubber or plastic: -
Covered Hose
,17. A hose consisting of only a woven jacket that is usually of linen yarns
and is of such quality that the yarn swells when wet, tending to seal the
hose: Unlined Hose
18. The status of a hose house, on a rack, reel or fire apparatus ready for use.
Does not include hoses in storage.: In service
19. Standpipe system that relies exclusively on the fire department to supply
the system demanded: Manual Standpipe
20. Valve installed to regulate pressures in an entire fire protection system or
standpipe system zone: Master Pressure Reducing Valve
21. Supervision by the holder of department certificate who is required to
be on premises when duties of the certificate are being performed: Personal
Supervision
22. A pilot operated pressure reducing valve that may be used with a fire or
booster pump designed for the purpose of preventing the incoming water
supply from dropping below a set pressure: Pressure Control Valve
23. A valve designed for the purpose of reducing the downstream water pres-
sure under both flowing (residual) and non flowing (static) confitions: Pres-
sure-Reducing Valve
24. A device designed to reduce, regulating, controlling or restricting water
pressure: Pressure Regulating Devices
25. A device that relieves excess water or air pressure from fire protection
piping systems: Pressure Relief Valve
26. A tank using air pressure to supply water to fire protection systems. (1/3
air 2/3 water): Pressure Tank
27. A system where fire protection piping services both 2 1/2in outlets for fire
department use and outlets for automatic sprinklers: Combination Standpipe &
Sprinkler System
28. A standpipe system that is vertically subdivided as required by code into
multiple zones in order to limit the maximum operating pressure. Each zone
will have it's own individual automatic water supply.: Standpipe, Multi-Zone
29. Measure of system pressure under non flow conditions: Static Pressure
30. A device capable of removing all solids of sufficient size from water: Strain-
er
31. A surge in pressure when a high velocity flow of water is abruptly shut off.
Can be 7 or more times the static Pressure.: Water Hammer
32. A standpipe system having piping containing water at all times: Wet stand-
pipe system
33. Used only by fire fighters. Hoses are 2 1/2" in diameter.: Class 1 Standpipe
system
, 34. Used by occupancy of building in case of fire. Hoses are 1 1/2" in diame-
ter: Class 2 Standpipe system
35. Used by occupancy of building or fire fighters. Hose can be adjusted to
either 1 1/2" to 2 1/2" in diameter: Class 3 Standpipe system
36. Can be used to increase pressure in a standpipe system: Fire Pump
37. In a dry pipe system there is a delay between the opening of a sprinkler
head or standpipe nozzle and the discharge of water. Delay is due to time
required for air to leave the systems piping. This difficulty can be overcome
by the installation of : Quick Opening Devices
38. Standpipe Systems are required in buildings that are over
: 6 foot, 75 feet in height
39. Pressure restricting device shall be installed at each hose outlet where the
static Pressure exceeds : 80 psi
40. Used to prevent water from flowing the opposite direction: Check Valve
41. Allows full unobstructed flow and automatically closes when pressure
is decreased. Fully closed when pressure reaches zero and prevents back
flow.: Swing Check Valve
42. A type of control valve for a sprinkler system in which the position of the
center screw indicates whether the valve is open or closed.: OS&Y (Outside
Stem and yolk) Valve
43. When the sprinkler head opens it causes a in the piping: -
Drop of pressure
44. When the clapper has opened the valve is said to have :-
Tripped
45. About of fires are extinguished or controlled when sprinklers are
installed: 96%
46. 4% failure rate of sprinklers are due to: Defective piping, closed supply valve,
frozen water lines, improper maintenance and blocked supply lines
47. Permission must be obtained from the local fire house to shut off a maxi-
mum of 10 sprinkler heads on a wet pipe system: Existing Cold Weather
Valves
48. Dry Pipe Sprinklers are installed where a Wet Pipe System -
: Cannot be heated to prevent freezing
49. Dry Pipe Sprinkler Systems are usually set to above the normal trip
level: 15 - 20 psi
50. Two devices are used to reduce the time needed to open the clapper, an
and an . Both automatically activated when a drop of
2 psi in air pressure is detected.: Accelerator, Exhauster
51. Under normal conditions there is no water in the piping due to the serious
dangers of water damage: Preaction Sprinkler Systems
Correct Answers 2025 Graded A+
1. The building owner shall assign an to comply with city re-
quirements: Impairment Coordinator
2. White Disc, Red Tag: System fully out of service
3. Blue Disc, Red Tag: System partially out of service
4. Green Tag, No Disc: System free of defects and in full service
5. Glycerin solution not greater than: 50%
6. Glygol solution not greater than: 40%
7. Records shall be posted near: MAIN CONTROL VALVE
8. A connection on the exterior of a building, through which the fire depart-
ment can pump supplemental water into the sprinkler system, standpipe, or
other system. (Formally known as a Siamese connection): Fire Department
Connection
9. A valve connection on a water supply system having one or more outlets
used to supply hose and fire department connections with water: Fire Hydrant
10. Sign attached to a hydraulically calculated sprinkler system indicating the
design density, required gallons per minute and pressure for the system to
operate properly: Hydraulic Placard
11. A method of sizing automatical sprinkler systems indicating the design
density, required Gallons per min, and pressure for system to function prop-
erly: Hydraulic Calculated Systems
12. A sprinkler head with an orifice size from 3/4" - less than 1": Large Orifice
Sprinkler
13. A raised series of beams (usually steel) bearing on posts or walls to
support mechanical equipment (usually on rooftops): Dunnage
14. Hose designed to be used by trained fire fighters to combat fires beyond
the incipient stage: Attack Hose
15. A non-collapsable hose used under positive pressure having an elas-
tomeric or thermoplastic tube, a braided or spiral reinforcement, and an outer
protective cover: Booster Hose
16. A hose with a jacket covered and lined with synthetic rubber or plastic: -
Covered Hose
,17. A hose consisting of only a woven jacket that is usually of linen yarns
and is of such quality that the yarn swells when wet, tending to seal the
hose: Unlined Hose
18. The status of a hose house, on a rack, reel or fire apparatus ready for use.
Does not include hoses in storage.: In service
19. Standpipe system that relies exclusively on the fire department to supply
the system demanded: Manual Standpipe
20. Valve installed to regulate pressures in an entire fire protection system or
standpipe system zone: Master Pressure Reducing Valve
21. Supervision by the holder of department certificate who is required to
be on premises when duties of the certificate are being performed: Personal
Supervision
22. A pilot operated pressure reducing valve that may be used with a fire or
booster pump designed for the purpose of preventing the incoming water
supply from dropping below a set pressure: Pressure Control Valve
23. A valve designed for the purpose of reducing the downstream water pres-
sure under both flowing (residual) and non flowing (static) confitions: Pres-
sure-Reducing Valve
24. A device designed to reduce, regulating, controlling or restricting water
pressure: Pressure Regulating Devices
25. A device that relieves excess water or air pressure from fire protection
piping systems: Pressure Relief Valve
26. A tank using air pressure to supply water to fire protection systems. (1/3
air 2/3 water): Pressure Tank
27. A system where fire protection piping services both 2 1/2in outlets for fire
department use and outlets for automatic sprinklers: Combination Standpipe &
Sprinkler System
28. A standpipe system that is vertically subdivided as required by code into
multiple zones in order to limit the maximum operating pressure. Each zone
will have it's own individual automatic water supply.: Standpipe, Multi-Zone
29. Measure of system pressure under non flow conditions: Static Pressure
30. A device capable of removing all solids of sufficient size from water: Strain-
er
31. A surge in pressure when a high velocity flow of water is abruptly shut off.
Can be 7 or more times the static Pressure.: Water Hammer
32. A standpipe system having piping containing water at all times: Wet stand-
pipe system
33. Used only by fire fighters. Hoses are 2 1/2" in diameter.: Class 1 Standpipe
system
, 34. Used by occupancy of building in case of fire. Hoses are 1 1/2" in diame-
ter: Class 2 Standpipe system
35. Used by occupancy of building or fire fighters. Hose can be adjusted to
either 1 1/2" to 2 1/2" in diameter: Class 3 Standpipe system
36. Can be used to increase pressure in a standpipe system: Fire Pump
37. In a dry pipe system there is a delay between the opening of a sprinkler
head or standpipe nozzle and the discharge of water. Delay is due to time
required for air to leave the systems piping. This difficulty can be overcome
by the installation of : Quick Opening Devices
38. Standpipe Systems are required in buildings that are over
: 6 foot, 75 feet in height
39. Pressure restricting device shall be installed at each hose outlet where the
static Pressure exceeds : 80 psi
40. Used to prevent water from flowing the opposite direction: Check Valve
41. Allows full unobstructed flow and automatically closes when pressure
is decreased. Fully closed when pressure reaches zero and prevents back
flow.: Swing Check Valve
42. A type of control valve for a sprinkler system in which the position of the
center screw indicates whether the valve is open or closed.: OS&Y (Outside
Stem and yolk) Valve
43. When the sprinkler head opens it causes a in the piping: -
Drop of pressure
44. When the clapper has opened the valve is said to have :-
Tripped
45. About of fires are extinguished or controlled when sprinklers are
installed: 96%
46. 4% failure rate of sprinklers are due to: Defective piping, closed supply valve,
frozen water lines, improper maintenance and blocked supply lines
47. Permission must be obtained from the local fire house to shut off a maxi-
mum of 10 sprinkler heads on a wet pipe system: Existing Cold Weather
Valves
48. Dry Pipe Sprinklers are installed where a Wet Pipe System -
: Cannot be heated to prevent freezing
49. Dry Pipe Sprinkler Systems are usually set to above the normal trip
level: 15 - 20 psi
50. Two devices are used to reduce the time needed to open the clapper, an
and an . Both automatically activated when a drop of
2 psi in air pressure is detected.: Accelerator, Exhauster
51. Under normal conditions there is no water in the piping due to the serious
dangers of water damage: Preaction Sprinkler Systems
