FDNY W49 SUPERVISION OF STORAGE, HANDLING AND USE OF
AEROSOLS AT CONSTRUCTION SITE PRACTICE EXAM | QUESTIONS
AND ANSWERS | VERIFIED ANSWERS GRADED A+ | LATEST EXAM
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
, 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.
, 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
, D. Level 0
Rationale: Level 3 aerosols are the most flammable and must be handled with strict
safety measures.
8. Storage rooms for aerosols must be constructed with at least what fire-
resistance rating?
A. 30 minutes
B. 1 hour
C. 2 hours
D. 4 hours
Rationale: A 2-hour fire-rated enclosure is required to contain potential fires
involving aerosols.
9. Aerosol containers should be stored:
A. Near sources of heat
B. Away from ignition sources and direct sunlight
C. On the floor for easy access
D. Next to flammable liquids
Rationale: Heat and sunlight increase internal pressure and risk explosion; storage
should avoid such exposure.
AEROSOLS AT CONSTRUCTION SITE PRACTICE EXAM | QUESTIONS
AND ANSWERS | VERIFIED ANSWERS GRADED A+ | LATEST EXAM
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
, 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.
, 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
, D. Level 0
Rationale: Level 3 aerosols are the most flammable and must be handled with strict
safety measures.
8. Storage rooms for aerosols must be constructed with at least what fire-
resistance rating?
A. 30 minutes
B. 1 hour
C. 2 hours
D. 4 hours
Rationale: A 2-hour fire-rated enclosure is required to contain potential fires
involving aerosols.
9. Aerosol containers should be stored:
A. Near sources of heat
B. Away from ignition sources and direct sunlight
C. On the floor for easy access
D. Next to flammable liquids
Rationale: Heat and sunlight increase internal pressure and risk explosion; storage
should avoid such exposure.
