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FDNY S16 Gaseous Fire Extinguishing
Systems Inspection, Testing, and Servicing
Technician (Citywide) Exam With Actual
Questions & Verified Answers, Plus
Explained Rationales/Expert Verified For
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- What is the primary purpose of a gaseous fire extinguishing system? A) To cool the room temperature B) To suppress a fire without damaging equipment C) To evacuate occupants D) To provide smoke ventilation
B) To suppress a fire without damaging equipment Gaseous systems are designed to extinguish fires in areas with sensitive equipment by using clean agents that do not leave residue.
- Which gas is commonly used in total flooding gaseous fire suppression systems? A) Carbon monoxide B) Halon 1301 C) Oxygen D) Methane
B) Halon 1301 Halon 1301 is effective, fast-acting, and safe for equipment areas, though its use is now restricted due to environmental concerns.
- What is the required inspection frequency for gaseous fire extinguishing systems in New York City? A) Monthly B) Quarterly C) Semi-annually D) Annually
D) Annually FDNY requires annual inspections to ensure that gaseous systems are in proper working condition.
- Which component of a gaseous system is responsible for releasing the extinguishing agent? A) Cylinder B) Nozzle C) Detector D) Control Panel
B) Nozzle Nozzles are designed to distribute the agent uniformly throughout the protected space when the system is activated.
- What must be checked during the visual inspection of a gaseous fire suppression cylinder? A) Color and pressure gauge B) Cylinder weight C) Valve and connections D) All of the above
A) To delay the discharge for safe evacuation The delay allows personnel to leave the protected area before the agent is released.
- Which document must the technician maintain after inspection or service? A) Manufacturer’s manual B) FDNY System Certificate C) Inspection and service log D) Alarm panel schematic
C) Inspection and service log FDNY requires detailed documentation of inspections, tests, and maintenance for compliance and accountability.
- What is the minimum clearance required around a gaseous system cylinder? A) 6 inches B) 12 inches C) 18 inches D) 24 inches
B) 12 inches Clearance ensures accessibility for inspection, maintenance, and emergency valve operation.
- When servicing a system, which tool is essential for checking cylinder pressure? A) Manometer B) Pressure gauge C) Thermometer D) Multimeter
B) Pressure gauge A pressure gauge is used to verify that the cylinder is at the proper charged level for operation.
- Which of the following is considered a clean agent? A) CO B) Halotron C) Water mist D) Foam
B) Halotron Clean agents like Halotron do not leave residue and are safe for sensitive equipment.
- What is the primary hazard associated with Halon 1301? A) Toxicity to humans at high concentrations B) Fire acceleration C) Electrical shorting D) Corrosive damage to equipment
A) Toxicity to humans at high concentrations While effective in fire suppression, Halon can displace oxygen and pose a suffocation risk.
- Which system component provides a manual activation option? A) Cylinder B) Manual pull station C) Heat detector D) Alarm bell
B) Manual pull station Manual pull stations allow operators to activate the system in an emergency if automatic detection fails.
- Which FDNY code governs gaseous fire extinguishing systems in NYC? A) NFPA 13 B) NFPA 72 C) NYC Fire Code Chapter 9 D) NYC Building Code Chapter 27
C) NYC Fire Code Chapter 9 NYC Fire Code Chapter 9 outlines the installation, inspection, and maintenance requirements for suppression systems.
- When testing a nozzle, what must be verified? A) Flow pattern B) Discharge time C) Agent distribution D) All of the above
D) All of the above Nozzle tests ensure proper coverage and correct system performance during a fire event.
- Which gas is primarily used for local application fire suppression in electrical rooms? A) CO B) Nitrogen C) Argon D) Oxygen
A) CO CO2 is commonly used for small, enclosed spaces and electrical hazards because it displaces oxygen to extinguish the fire.
- What safety feature prevents accidental discharge during servicing?
A) Safety pin B) Cylinder valve lock C) Control panel disable D) All of the above
D) All of the above Safety devices and procedures prevent unintentional agent release and protect personnel.
- Which type of piping is typically used in gaseous suppression systems? A) PVC B) Black steel C) Copper D) Flexible hose
B) Black steel Black steel piping is strong, durable, and rated for the pressures used in gaseous systems.
- Which factor determines the amount of agent required for a protected space? A) Room volume B) Occupancy type C) Ceiling height D) All of the above
D) All of the above The design concentration depends on room volume, occupancy, and height to ensure adequate fire suppression.
- During a system inspection, what is checked on the control panel? A) Wiring connections
C) Continue operation D) Mark it for disposal
B) Replace or recharge the cylinder Low-pressure cylinders cannot provide sufficient agent during a fire and must be recharged or replaced.
- What type of system is designed to release agent only in a specific area? A) Total flooding B) Local application C) Deluge D) Sprinkler
B) Local application Local application systems target a specific hazard area rather than flooding the entire room.
- Which of the following is a high-pressure gaseous agent? A) FM- B) CO C) Argonite D) Halon 1211
B) CO CO2 systems often operate at high pressures (over 1000 psi) to store sufficient agent in cylinders.
- What should be verified on discharge piping during inspection? A) Leaks B) Proper support C) Corrosion D) All of the above
D) All of the above Piping integrity ensures correct agent delivery and prevents accidental leaks.
- How is agent concentration verified in a protected space? A) Using a chemical test kit B) Measuring temperature C) Calculating based on room volume and agent charge D) Checking cylinder pressure only
C) Calculating based on room volume and agent charge Proper concentration is determined mathematically to ensure sufficient fire suppression.
- Which NFPA standard provides guidelines for gaseous extinguishing systems? A) NFPA 10 B) NFPA 2001 C) NFPA 13R D) NFPA 72
B) NFPA 2001 NFPA 2001 covers clean agent fire extinguishing systems, including design, installation, and maintenance.
- Which action is required if a system shows a low-pressure alarm? A) Ignore it B) Reset the alarm C) Investigate and correct the cause D) Activate the system manually
- How is a system typically activated automatically? A) Pulling a manual lever B) Detection of fire by sensors C) Pressing an alarm button D) Opening a door
B) Detection of fire by sensors Automatic activation is triggered when detectors sense smoke, heat, or flame.
- Which maintenance action ensures proper nozzle performance? A) Painting nozzles B) Cleaning and inspecting for obstruction C) Replacing piping D) Recharging cylinders
B) Cleaning and inspecting for obstruction Debris or dirt can prevent proper agent distribution and reduce system effectiveness.
- Which documentation is required for hydrostatic testing? A) Manufacturer’s manual B) Test certificate C) Alarm panel log D) Fire watch report
B) Test certificate A hydrostatic test certificate verifies that the cylinder has passed pressure testing and is safe for use.
- Which gas is environmentally friendly and commonly replacing Halon? A) CO
B) FM-
C) Nitrogen D) Argon
B) FM- FM-200 is a clean agent with minimal environmental impact, often used as a Halon replacement.
- When inspecting a control panel, which condition indicates a malfunction? A) LED indicators off B) Audible alarm active C) Wiring loose D) All of the above
D) All of the above Any of these conditions may indicate a problem that requires corrective action.
- What is the main reason for having an emergency stop feature on a gaseous system? A) To conserve agent B) To prevent accidental discharge during maintenance C) To reduce noise D) To control room temperature
B) To prevent accidental discharge during maintenance An emergency stop ensures safety during servicing or unforeseen malfunctions.
- Which factor affects the agent discharge rate? A) Cylinder pressure B) Piping diameter
B) As a liquid under pressure CO2 is stored as a liquid at high pressure, which vaporizes during discharge to extinguish the fire.
- What is a common sign of leakage in a gaseous system? A) Hissing sound B) Frost on cylinder C) Reduced cylinder weight D) All of the above
D) All of the above Leaks can be detected by sound, temperature changes, or weight loss of the cylinder.
- What is the main advantage of clean agents over CO2? A) Faster discharge B) Non-conductive and safe for electronics C) Lower cost D) Requires no maintenance
B) Non-conductive and safe for electronics Clean agents suppress fires without damaging sensitive electronic equipment, unlike CO2 which can be hazardous to personnel.
- Which test ensures a system’s electrical components are functional? A) Hydrostatic test B) Functional panel test C) Cylinder weighing D) Pressure gauge test
B) Functional panel test Electrical and control systems must be tested to ensure automatic and manual activation works properly.
- What action is required if a cylinder is found corroded? A) Paint it B) Replace or send for professional refurbishment C) Ignore and continue use D) Move to another location
B) Replace or send for professional refurbishment Corrosion can weaken the cylinder and lead to catastrophic failure, so proper remediation is required.
- Which factor primarily affects the sizing of a CO2 cylinder for a protected space? A) Room volume B) Temperature C) Ceiling material D) Floor finish
A) Room volume The amount of agent required is based on the cubic footage of the protected area to ensure proper fire suppression.
- What is the purpose of a delay timer in gaseous systems? A) Reduce agent consumption B) Allow evacuation before discharge C) Increase cylinder pressure D) Signal the fire department
B) Allow evacuation before discharge Delay timers give personnel time to safely exit before the agent is released.
- Which of the following is required when a gaseous system is installed in a server room? A) Manual pull station
C) Alarm bell D) Manual pull station
B) Pressure switch Pressure switches trigger alarms or control signals if the system pressure is out of the normal range.
- What is the first step before performing maintenance on a system? A) Notify building occupants B) Shut down system power C) Check cylinder weight D) Inspect piping
B) Shut down system power De-energizing prevents accidental activation and protects personnel during service.
- Which agent is commonly used in clean agent fire suppression systems? A) FM- B) CO C) Halon 1211 D) Water mist
A) FM- FM-200 is safe for electronics, leaves no residue, and is environmentally friendly.
- What is the purpose of a discharge check valve? A) Prevent backflow of agent B) Measure flow rate C) Indicate cylinder pressure D) Control nozzle orientation
A) Prevent backflow of agent Check valves ensure the agent flows toward the protected space and does not return into the piping system.
- How often must the piping and nozzles be inspected for corrosion or blockage? A) Monthly B) Quarterly C) Annually D) Every 5 years
C) Annually Annual inspections ensure the system is free from obstructions and corrosion that could prevent proper operation.
- Which is a potential hazard when discharging CO2 into an enclosed space? A) Freezing injuries B) Oxygen displacement C) Visibility reduction D) All of the above
D) All of the above CO2 can cause frostbite on contact, reduce oxygen levels, and obscure vision, so safety precautions are critical.
- Which record must be updated after hydrostatic testing? A) System schematic B) Cylinder log C) Fire watch report D) Alarm panel record
