FDNY S16: Gaseous Fire Extinguishing System
PRACTICE QUESTIONS WITH CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A
|INSTANT DOWNLOAD PDF
Question 1: What is the primary purpose of a gaseous fire
extinguishing system?
a) Cool the room temperature
b) Suppress fire by reducing oxygen
c) Release water mist to extinguish fire
d) Provide emergency lighting
Correct Answer: b) Suppress fire by reducing oxygen. Gaseous
systems use agents such as FM-200 or CO₂ to displace oxygen or
inhibit chemical reactions, effectively extinguishing the fire
without water.
Question 2: Which of the following agents is commonly used in
clean agent gaseous fire suppression systems?
a) FM-200 (HFC-227ea)
b) Sodium bicarbonate
c) Water
d) Foam
Correct Answer: a) FM-200 (HFC-227ea). FM-200 is a clean
agent that leaves no residue and is safe for sensitive equipment,
making it ideal for data centers and server rooms.
Question 3: What NFPA standard governs the design and
installation of gaseous fire suppression systems?
,a) NFPA 13
b) NFPA 2001
c) NFPA 72
d) NFPA 70
Correct Answer: b) NFPA 2001. NFPA 2001 specifically
addresses clean agent fire extinguishing systems, including
design, installation, and maintenance requirements.
Question 4: What is a critical safety consideration when
discharging a CO₂ system in an enclosed space?
a) Ensure fans are on
b) Evacuate personnel immediately
c) Keep the room temperature high
d) Open all windows
Correct Answer: b) Evacuate personnel immediately. CO₂
displaces oxygen, posing a severe asphyxiation risk to anyone in
the protected area.
Question 5: In a gaseous fire suppression system, what is the
role of a “nozzle”?
a) Detect fire
b) Discharge extinguishing agent evenly
c) Activate the alarm system
d) Maintain pressure in the system
Correct Answer: b) Discharge extinguishing agent evenly.
Nozzles are designed to deliver the agent uniformly throughout
the protected space for effective fire suppression.
,Question 6: Which of the following is a characteristic of “clean
agent” extinguishing systems?
a) Leaves residue after discharge
b) Safe for electronic equipment
c) Relies on water to extinguish fire
d) Only used outdoors
Correct Answer: b) Safe for electronic equipment. Clean agents
like FM-200 and Novec 1230 extinguish fire without damaging
sensitive electronics or leaving residue.
Question 7: Which type of fire is a gaseous fire suppression
system primarily designed to combat?
a) Class A (ordinary combustibles)
b) Class B (flammable liquids)
c) Class C (electrical equipment)
d) All of the above
Correct Answer: d) All of the above. Gaseous systems can
handle Class A, B, and C fires, depending on the agent used, but
are especially suited for sensitive electrical equipment areas.
Question 8: What is the minimum maintenance interval
recommended for most clean agent systems?
a) Monthly
b) Annually
c) Every 5 years
d) Every 10 years
Correct Answer: b) Annually. NFPA 2001 requires annual
inspection and testing to ensure system reliability.
, Question 9: How does FM-200 extinguish a fire?
a) Smothers fire by removing oxygen
b) Lowers the temperature below ignition point
c) Chemically interrupts the combustion reaction
d) Creates a water barrier
Correct Answer: c) Chemically interrupts the combustion
reaction. FM-200 absorbs heat and interferes with the chemical
chain reaction of the fire.
Question 10: What is the primary concern when designing a
gaseous suppression system in a room with open doors or
vents?
a) Agent leakage reducing effectiveness
b) Electrical surge
c) Overheating of equipment
d) Excess humidity
Correct Answer: a) Agent leakage reducing effectiveness.
Openings allow the agent to escape, possibly preventing
adequate concentration for fire suppression.
Question 11: Which component detects fire and initiates the
discharge of a gaseous system?
a) Pressure gauge
b) Fire detector
c) Agent cylinder
d) Nozzle
Correct Answer: b) Fire detector. Smoke or heat detectors sense
PRACTICE QUESTIONS WITH CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A
|INSTANT DOWNLOAD PDF
Question 1: What is the primary purpose of a gaseous fire
extinguishing system?
a) Cool the room temperature
b) Suppress fire by reducing oxygen
c) Release water mist to extinguish fire
d) Provide emergency lighting
Correct Answer: b) Suppress fire by reducing oxygen. Gaseous
systems use agents such as FM-200 or CO₂ to displace oxygen or
inhibit chemical reactions, effectively extinguishing the fire
without water.
Question 2: Which of the following agents is commonly used in
clean agent gaseous fire suppression systems?
a) FM-200 (HFC-227ea)
b) Sodium bicarbonate
c) Water
d) Foam
Correct Answer: a) FM-200 (HFC-227ea). FM-200 is a clean
agent that leaves no residue and is safe for sensitive equipment,
making it ideal for data centers and server rooms.
Question 3: What NFPA standard governs the design and
installation of gaseous fire suppression systems?
,a) NFPA 13
b) NFPA 2001
c) NFPA 72
d) NFPA 70
Correct Answer: b) NFPA 2001. NFPA 2001 specifically
addresses clean agent fire extinguishing systems, including
design, installation, and maintenance requirements.
Question 4: What is a critical safety consideration when
discharging a CO₂ system in an enclosed space?
a) Ensure fans are on
b) Evacuate personnel immediately
c) Keep the room temperature high
d) Open all windows
Correct Answer: b) Evacuate personnel immediately. CO₂
displaces oxygen, posing a severe asphyxiation risk to anyone in
the protected area.
Question 5: In a gaseous fire suppression system, what is the
role of a “nozzle”?
a) Detect fire
b) Discharge extinguishing agent evenly
c) Activate the alarm system
d) Maintain pressure in the system
Correct Answer: b) Discharge extinguishing agent evenly.
Nozzles are designed to deliver the agent uniformly throughout
the protected space for effective fire suppression.
,Question 6: Which of the following is a characteristic of “clean
agent” extinguishing systems?
a) Leaves residue after discharge
b) Safe for electronic equipment
c) Relies on water to extinguish fire
d) Only used outdoors
Correct Answer: b) Safe for electronic equipment. Clean agents
like FM-200 and Novec 1230 extinguish fire without damaging
sensitive electronics or leaving residue.
Question 7: Which type of fire is a gaseous fire suppression
system primarily designed to combat?
a) Class A (ordinary combustibles)
b) Class B (flammable liquids)
c) Class C (electrical equipment)
d) All of the above
Correct Answer: d) All of the above. Gaseous systems can
handle Class A, B, and C fires, depending on the agent used, but
are especially suited for sensitive electrical equipment areas.
Question 8: What is the minimum maintenance interval
recommended for most clean agent systems?
a) Monthly
b) Annually
c) Every 5 years
d) Every 10 years
Correct Answer: b) Annually. NFPA 2001 requires annual
inspection and testing to ensure system reliability.
, Question 9: How does FM-200 extinguish a fire?
a) Smothers fire by removing oxygen
b) Lowers the temperature below ignition point
c) Chemically interrupts the combustion reaction
d) Creates a water barrier
Correct Answer: c) Chemically interrupts the combustion
reaction. FM-200 absorbs heat and interferes with the chemical
chain reaction of the fire.
Question 10: What is the primary concern when designing a
gaseous suppression system in a room with open doors or
vents?
a) Agent leakage reducing effectiveness
b) Electrical surge
c) Overheating of equipment
d) Excess humidity
Correct Answer: a) Agent leakage reducing effectiveness.
Openings allow the agent to escape, possibly preventing
adequate concentration for fire suppression.
Question 11: Which component detects fire and initiates the
discharge of a gaseous system?
a) Pressure gauge
b) Fire detector
c) Agent cylinder
d) Nozzle
Correct Answer: b) Fire detector. Smoke or heat detectors sense
