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FDNY W96 Full-Service Shop of Portable Fire Extinguishers
Certificate of Fitness Exam COMPLETE QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR-JUST
RELEASED
FDNY W96 Full Service Shop of Portable Fire Extinguishers Certificate of Fitness Exam
Summarized Exam Coverage (Point Form)
• Certificate Authority: Required to work in an FDNY-approved full-service shop (inspection,
testing, recharging, repair). W96 (full-service) vs. S96 (sales only) .
• Regulatory Standards: Compliance with NYC Fire Code, NFPA 10 (Portable Fire
Extinguishers), NFPA 51B (Fire Prevention), and ANSI/UL standards .
• Fire Classifications & Agents: Class A (Wood/Paper/Cloth - Water, Dry Chem), Class
B (Flammable Liquids - CO2, Foam), Class C (Electrical - CO2, Clean Agent), Class D (Combustible
Metals - Dry Powder), Class K (Cooking Oils - Wet Chemical) .
• Inspection Procedures: Monthly visual inspections (pressure gauge, pin, tamper seal,
corrosion). Annual maintenance required .
• Service & Repair Protocols: Depressurize before service. Replace O-rings/gaskets during
recharge. Use manufacturer-specified agent .
• Hydrostatic Testing: CO2 & Wet Chemical: 5 years; Dry Chemical & Halon: 12 years. Test
with water pressure, never air (explosion risk) .
• Six-Year Maintenance: Required for stored-pressure dry chemical extinguishers (complete
teardown and internal exam) .
• Recordkeeping & Tags: Service tags require: Date, Technician COF#, Company Name/License#,
Work Performed. Records retained 4 years .
• Safety Distances: 10-foot clearance from open flames/sparks during service work .
• Prohibited Practices: Selling counterfeit (no UL label) units. Unlicensed sales of units >5 lbs.
Implying FDNY affiliation .
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1. You are the W96 holder at a full-service shop. A client brings in a stored-pressure dry chemical
extinguisher that was partially discharged. What is your FIRST action before disassembly?
A. Immediately refill it with monoammonium phosphate.
B. Weigh the cylinder to calculate the remaining agent.
C. Fully discharge or depressurize the remaining contents.
D. Remove the valve stem using a hydrostatic bench.
Answer: C
Rationale: Depressurizing the extinguisher completely before any disassembly ensures technician safety
and prevents uncontrolled release of pressure or agent during maintenance .
2. While servicing a CO2 extinguisher, you notice the cylinder is not stamped with a UL rating.
According to FDNY regulations, you must:
A. Service it as usual but note the missing stamp on the tag.
B. Reject the unit and report it as potentially counterfeit.
C. Perform a hydrostatic test immediately to verify integrity.
D. Send it to a different shop certified for non-UL units.
Answer: B
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Rationale: All portable fire extinguishers sold or leased in NYC must meet ANSI/UL standards. The
absence of a UL listing or label renders the extinguisher fraudulent, and it must be reported to the FDNY .
3. A restaurant owner asks for an extinguisher for the kitchen, specifically for the deep fryer. You
should sell them a:
A. 10 lb ABC dry chemical unit.
B. 5 lb CO2 unit.
C. Class K wet chemical extinguisher.
D. 2.5 gallon pressurized water unit.
Answer: C
Rationale: Class K extinguishers utilize a wet chemical agent that saponifies cooking oils and fats,
creating a foam layer that cools and smothers the fire, which is specifically required for commercial
cooking appliances .
4. You are performing the annual maintenance on a stored-pressure dry chemical unit. What must be
performed because the unit is 6 years old (based on the manufacture date)?
A. Hydrostatic testing only.
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B. Six-year internal maintenance (tear-down and inspection).
C. Replacement of the plastic nozzle.
D. Conversion to a different chemical agent.
Answer: B
*Rationale: NFPA 10 and FDNY regulations require that stored-pressure dry chemical extinguishers
undergo a complete internal examination every six years, which involves emptying the unit and
inspecting the interior for corrosion or damage .*
5. A customer wants to buy an extinguisher for their home garage where they work on cars (wood,
gasoline, electrical outlets). Which single extinguisher is most appropriate for this mixed hazard?
A. Class K wet chemical.
B. Class D dry powder.
C. 5 lb Class B:C only.
D. 5 lb ABC multipurpose dry chemical.
Answer: D
Rationale: The ABC multipurpose dry chemical (usually monoammonium phosphate) is effective on Class
FDNY W96 Full-Service Shop of Portable Fire Extinguishers
Certificate of Fitness Exam COMPLETE QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR-JUST
RELEASED
FDNY W96 Full Service Shop of Portable Fire Extinguishers Certificate of Fitness Exam
Summarized Exam Coverage (Point Form)
• Certificate Authority: Required to work in an FDNY-approved full-service shop (inspection,
testing, recharging, repair). W96 (full-service) vs. S96 (sales only) .
• Regulatory Standards: Compliance with NYC Fire Code, NFPA 10 (Portable Fire
Extinguishers), NFPA 51B (Fire Prevention), and ANSI/UL standards .
• Fire Classifications & Agents: Class A (Wood/Paper/Cloth - Water, Dry Chem), Class
B (Flammable Liquids - CO2, Foam), Class C (Electrical - CO2, Clean Agent), Class D (Combustible
Metals - Dry Powder), Class K (Cooking Oils - Wet Chemical) .
• Inspection Procedures: Monthly visual inspections (pressure gauge, pin, tamper seal,
corrosion). Annual maintenance required .
• Service & Repair Protocols: Depressurize before service. Replace O-rings/gaskets during
recharge. Use manufacturer-specified agent .
• Hydrostatic Testing: CO2 & Wet Chemical: 5 years; Dry Chemical & Halon: 12 years. Test
with water pressure, never air (explosion risk) .
• Six-Year Maintenance: Required for stored-pressure dry chemical extinguishers (complete
teardown and internal exam) .
• Recordkeeping & Tags: Service tags require: Date, Technician COF#, Company Name/License#,
Work Performed. Records retained 4 years .
• Safety Distances: 10-foot clearance from open flames/sparks during service work .
• Prohibited Practices: Selling counterfeit (no UL label) units. Unlicensed sales of units >5 lbs.
Implying FDNY affiliation .
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1. You are the W96 holder at a full-service shop. A client brings in a stored-pressure dry chemical
extinguisher that was partially discharged. What is your FIRST action before disassembly?
A. Immediately refill it with monoammonium phosphate.
B. Weigh the cylinder to calculate the remaining agent.
C. Fully discharge or depressurize the remaining contents.
D. Remove the valve stem using a hydrostatic bench.
Answer: C
Rationale: Depressurizing the extinguisher completely before any disassembly ensures technician safety
and prevents uncontrolled release of pressure or agent during maintenance .
2. While servicing a CO2 extinguisher, you notice the cylinder is not stamped with a UL rating.
According to FDNY regulations, you must:
A. Service it as usual but note the missing stamp on the tag.
B. Reject the unit and report it as potentially counterfeit.
C. Perform a hydrostatic test immediately to verify integrity.
D. Send it to a different shop certified for non-UL units.
Answer: B
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Rationale: All portable fire extinguishers sold or leased in NYC must meet ANSI/UL standards. The
absence of a UL listing or label renders the extinguisher fraudulent, and it must be reported to the FDNY .
3. A restaurant owner asks for an extinguisher for the kitchen, specifically for the deep fryer. You
should sell them a:
A. 10 lb ABC dry chemical unit.
B. 5 lb CO2 unit.
C. Class K wet chemical extinguisher.
D. 2.5 gallon pressurized water unit.
Answer: C
Rationale: Class K extinguishers utilize a wet chemical agent that saponifies cooking oils and fats,
creating a foam layer that cools and smothers the fire, which is specifically required for commercial
cooking appliances .
4. You are performing the annual maintenance on a stored-pressure dry chemical unit. What must be
performed because the unit is 6 years old (based on the manufacture date)?
A. Hydrostatic testing only.
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B. Six-year internal maintenance (tear-down and inspection).
C. Replacement of the plastic nozzle.
D. Conversion to a different chemical agent.
Answer: B
*Rationale: NFPA 10 and FDNY regulations require that stored-pressure dry chemical extinguishers
undergo a complete internal examination every six years, which involves emptying the unit and
inspecting the interior for corrosion or damage .*
5. A customer wants to buy an extinguisher for their home garage where they work on cars (wood,
gasoline, electrical outlets). Which single extinguisher is most appropriate for this mixed hazard?
A. Class K wet chemical.
B. Class D dry powder.
C. 5 lb Class B:C only.
D. 5 lb ABC multipurpose dry chemical.
Answer: D
Rationale: The ABC multipurpose dry chemical (usually monoammonium phosphate) is effective on Class
