FDNY W49
FDNY W49 SUPERVISION OF STORAGE, HANDLING
AND USE OF AEROSOLS AT CONSTRUCTION SITE
PRACTICE EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A
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,FDNY W49
1. What is the primary purpose of the FDNY W-49 Certificate of
Fitness?
A.To supervise the sale of aerosol products in retail stores
B. To ensure the safe storage, handling, and use of aerosol
products at construction sites
C. To transport aerosol products to job sites
D. To inspect aerosol labeling for compliance
Rationale: The W-49 certificate ensures that construction
sites manage aerosols safely to prevent fires and explosions.
2. Which NYC Fire Code section governs the storage and use of
aerosols?
A.FC 3404
B. FC 2806
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, C. FC 2603
D. FC 2704
Rationale: Fire Code Section 2806 covers aerosols and their
safe handling requirements.
3. Aerosols are defined by FDNY as:
A.Liquids stored in open containers
B. Compressed gases stored in cylinders
C. Products packaged under pressure and released as a
spray, mist, or foam
D. Any material stored in sealed glass bottles
Rationale: Aerosols are pressurized products that release
contents as mist, spray, or foam when actuated.
4. Aerosol products are divided into how many classifications
by hazard level?
A.Two
B. Three
C. Four
D. Five
Rationale: FDNY and NFPA classify aerosols into Level 1, Level
2, and Level 3 based on flammability.
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, 5. Level 1 aerosols are defined as:
A.Highly flammable with flash point below -20°F
B. Containing no more than 25% flammable components
C. Extremely explosive products
D. Containing more than 80% flammable gases
Rationale: Level 1 aerosols have minimal flammable content
and present the lowest hazard.
6. What is the maximum allowable quantity (MAQ) of Level 3
aerosols in a construction site without a permit?
A.10 pounds
B. 25 pounds
C. 50 pounds
D. 100 pounds
Rationale: Up to 50 pounds of Level 3 aerosols may be stored
without a permit, beyond which FDNY approval is required.
7. Which type of aerosol poses the greatest fire risk?
A.Level 1
B. Level 2
C. Level 3
https://www.stuvia.com/user/MBoffin
FDNY W49 SUPERVISION OF STORAGE, HANDLING
AND USE OF AEROSOLS AT CONSTRUCTION SITE
PRACTICE EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A
https://www.stuvia.com/user/MBoffin
,FDNY W49
1. What is the primary purpose of the FDNY W-49 Certificate of
Fitness?
A.To supervise the sale of aerosol products in retail stores
B. To ensure the safe storage, handling, and use of aerosol
products at construction sites
C. To transport aerosol products to job sites
D. To inspect aerosol labeling for compliance
Rationale: The W-49 certificate ensures that construction
sites manage aerosols safely to prevent fires and explosions.
2. Which NYC Fire Code section governs the storage and use of
aerosols?
A.FC 3404
B. FC 2806
https://www.stuvia.com/user/MBoffin
, C. FC 2603
D. FC 2704
Rationale: Fire Code Section 2806 covers aerosols and their
safe handling requirements.
3. Aerosols are defined by FDNY as:
A.Liquids stored in open containers
B. Compressed gases stored in cylinders
C. Products packaged under pressure and released as a
spray, mist, or foam
D. Any material stored in sealed glass bottles
Rationale: Aerosols are pressurized products that release
contents as mist, spray, or foam when actuated.
4. Aerosol products are divided into how many classifications
by hazard level?
A.Two
B. Three
C. Four
D. Five
Rationale: FDNY and NFPA classify aerosols into Level 1, Level
2, and Level 3 based on flammability.
https://www.stuvia.com/user/MBoffin
, 5. Level 1 aerosols are defined as:
A.Highly flammable with flash point below -20°F
B. Containing no more than 25% flammable components
C. Extremely explosive products
D. Containing more than 80% flammable gases
Rationale: Level 1 aerosols have minimal flammable content
and present the lowest hazard.
6. What is the maximum allowable quantity (MAQ) of Level 3
aerosols in a construction site without a permit?
A.10 pounds
B. 25 pounds
C. 50 pounds
D. 100 pounds
Rationale: Up to 50 pounds of Level 3 aerosols may be stored
without a permit, beyond which FDNY approval is required.
7. Which type of aerosol poses the greatest fire risk?
A.Level 1
B. Level 2
C. Level 3
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