FDNY S-17 Commercial Cooking Wet Chemical
Fire Extinguishing Systems Exam Questions &
Answers 2026 Columbia University
The FDNY S17 Certificate of Fitness authorizes technicians to service commercial
kitchen wet chemical fire suppression systems. This credential covers the
installation, inspection, and maintenance of systems that extinguish Class K fires
from cooking oils and fats using a potassium-based agent. Candidates must pass a
written exam on NFPA 17A standards, system components, and required testing
intervals.
Testing Frequency
Q5. What inspection/testing frequency does NFPA 96 set for
system servicing by a qualified technician?
A) Every month
B) Every 3 months
C) Every 6 months
D) Annually
,Correct Answer: D) Annually
Rationale:
Qualified technicians must perform a comprehensive annual
inspection and testing, including full function testing, hose
inspection, fusible links, nozzles, agent quantity, and control
operation.
6) Agent Compatibility
Q6. Wet chemical agent used in kitchen systems is primarily
designed to:
A) Cool burning metal
B) Form a saponification layer to suppress grease fires
C) Smother electrical equipment fires
D) Disrupt the flame in combustible metal fires
Correct Answer: B) Form a saponification layer to suppress grease
fires
Rationale:
Wet chemical agents (potassium acetate based) react with
fats/oils to form a soapy layer (“saponification”), cooling and
,sealing the surface to prevent re-ignition—critical for Class K
commercial cooking hazards.
Q1. According to NFPA requirements, how often must wet chemical
fire extinguishing systems in commercial cooking operations be
inspected?
A) Monthly
B) Quarterly
C) Semi-annually
D) Annually
Correct Answer: A) Monthly
Rationale:
NFPA standards (e.g., NFPA 96) require monthly visual inspections
of commercial cooking fire suppression systems to ensure
components are in place, unobstructed and clearly visible.
Quarterly or annual checks relate to more detailed
inspections/servicing.
2) System Components
, Q2. The purpose of the fusible link in a wet chemical fire
extinguishing system is to:
A) Hold the cylinder under pressure
B) Detect heat from a fire and release agent
C) Provide a reset point for manual pull stations
D) Measure the amount of wet chemical agent left
Correct Answer: B) Detect heat from a fire and release agent
Rationale:
A fusible link melts at a predetermined temperature (typically
~360°F) and triggers activation of the system to discharge wet
chemical agent onto the cooking surface.
3) Inspection Procedures
Q3. During a monthly inspection, you notice the nozzle distribution
tubes are bent and some nozzles are pointing away from the
cooking surface. What should you do?
A) Reposition the nozzles to original alignment
B) Record the issue and schedule repairs immediately
C) Ignore if the system is still charged
D) Add more agent to compensate
Fire Extinguishing Systems Exam Questions &
Answers 2026 Columbia University
The FDNY S17 Certificate of Fitness authorizes technicians to service commercial
kitchen wet chemical fire suppression systems. This credential covers the
installation, inspection, and maintenance of systems that extinguish Class K fires
from cooking oils and fats using a potassium-based agent. Candidates must pass a
written exam on NFPA 17A standards, system components, and required testing
intervals.
Testing Frequency
Q5. What inspection/testing frequency does NFPA 96 set for
system servicing by a qualified technician?
A) Every month
B) Every 3 months
C) Every 6 months
D) Annually
,Correct Answer: D) Annually
Rationale:
Qualified technicians must perform a comprehensive annual
inspection and testing, including full function testing, hose
inspection, fusible links, nozzles, agent quantity, and control
operation.
6) Agent Compatibility
Q6. Wet chemical agent used in kitchen systems is primarily
designed to:
A) Cool burning metal
B) Form a saponification layer to suppress grease fires
C) Smother electrical equipment fires
D) Disrupt the flame in combustible metal fires
Correct Answer: B) Form a saponification layer to suppress grease
fires
Rationale:
Wet chemical agents (potassium acetate based) react with
fats/oils to form a soapy layer (“saponification”), cooling and
,sealing the surface to prevent re-ignition—critical for Class K
commercial cooking hazards.
Q1. According to NFPA requirements, how often must wet chemical
fire extinguishing systems in commercial cooking operations be
inspected?
A) Monthly
B) Quarterly
C) Semi-annually
D) Annually
Correct Answer: A) Monthly
Rationale:
NFPA standards (e.g., NFPA 96) require monthly visual inspections
of commercial cooking fire suppression systems to ensure
components are in place, unobstructed and clearly visible.
Quarterly or annual checks relate to more detailed
inspections/servicing.
2) System Components
, Q2. The purpose of the fusible link in a wet chemical fire
extinguishing system is to:
A) Hold the cylinder under pressure
B) Detect heat from a fire and release agent
C) Provide a reset point for manual pull stations
D) Measure the amount of wet chemical agent left
Correct Answer: B) Detect heat from a fire and release agent
Rationale:
A fusible link melts at a predetermined temperature (typically
~360°F) and triggers activation of the system to discharge wet
chemical agent onto the cooking surface.
3) Inspection Procedures
Q3. During a monthly inspection, you notice the nozzle distribution
tubes are bent and some nozzles are pointing away from the
cooking surface. What should you do?
A) Reposition the nozzles to original alignment
B) Record the issue and schedule repairs immediately
C) Ignore if the system is still charged
D) Add more agent to compensate
