FDNY C91 Supervision of Storage, Handling
and Use of Hazardous Materials Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. The primary responsibility of a C91 Certificate of Fitness holder is
to:
A. Perform laboratory testing
B. Supervise safe storage, handling, and use of hazardous
materials
C. Approve building permits
D. Conduct fire investigations
Answer: B
The C91 holder is responsible for oversight and compliance related
to hazardous materials safety.
2. Hazardous materials must be stored in accordance with:
A. Manufacturer preference only
B. FDNY rules and Fire Code
C. Federal OSHA standards only
D. Insurance requirements
Answer: B
FDNY Fire Code and Rules govern hazardous material storage in
NYC.
3. Which document provides detailed information about a hazardous
material’s properties and hazards?
, A. Building permit
B. Shipping invoice
C. Safety Data Sheet (SDS)
D. Logbook
Answer: C
An SDS contains hazard, handling, and emergency response
information.
4. Incompatible materials should be:
A. Stored together for easy access
B. Mixed before disposal
C. Stored separately to prevent reactions
D. Stored outdoors only
Answer: C
Separating incompatibles reduces the risk of fires, explosions, or
toxic releases.
5. Secondary containment is primarily used to:
A. Improve appearance
B. Prevent spills from spreading
C. Increase storage capacity
D. Allow stacking of containers
Answer: B
Secondary containment captures leaks or spills from primary
containers.
6. Flammable liquids should be stored in:
A. Cardboard boxes
B. Open plastic containers
C. Approved containers or cabinets
, D. Any available container
Answer: C
Approved containers and cabinets reduce fire risk.
7. Which is considered a hazardous material?
A. Tap water
B. Sand
C. Corrosive acid
D. Office paper
Answer: C
Corrosive acids pose chemical burn and reaction hazards.
8. Containers holding hazardous materials must be labeled with:
A. Price and supplier
B. Chemical name and hazard warnings
C. Employee initials only
D. Date of purchase only
Answer: B
Labels identify contents and hazards for safe handling and
emergencies.
9. A spill response plan should include:
A. Only cleanup schedules
B. Emergency contacts and procedures
C. Employee vacation lists
D. Equipment maintenance logs
Answer: B
Clear procedures and contacts are critical during spills.
10. When transferring hazardous materials, employees should:
A. Rush to finish quickly
and Use of Hazardous Materials Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. The primary responsibility of a C91 Certificate of Fitness holder is
to:
A. Perform laboratory testing
B. Supervise safe storage, handling, and use of hazardous
materials
C. Approve building permits
D. Conduct fire investigations
Answer: B
The C91 holder is responsible for oversight and compliance related
to hazardous materials safety.
2. Hazardous materials must be stored in accordance with:
A. Manufacturer preference only
B. FDNY rules and Fire Code
C. Federal OSHA standards only
D. Insurance requirements
Answer: B
FDNY Fire Code and Rules govern hazardous material storage in
NYC.
3. Which document provides detailed information about a hazardous
material’s properties and hazards?
, A. Building permit
B. Shipping invoice
C. Safety Data Sheet (SDS)
D. Logbook
Answer: C
An SDS contains hazard, handling, and emergency response
information.
4. Incompatible materials should be:
A. Stored together for easy access
B. Mixed before disposal
C. Stored separately to prevent reactions
D. Stored outdoors only
Answer: C
Separating incompatibles reduces the risk of fires, explosions, or
toxic releases.
5. Secondary containment is primarily used to:
A. Improve appearance
B. Prevent spills from spreading
C. Increase storage capacity
D. Allow stacking of containers
Answer: B
Secondary containment captures leaks or spills from primary
containers.
6. Flammable liquids should be stored in:
A. Cardboard boxes
B. Open plastic containers
C. Approved containers or cabinets
, D. Any available container
Answer: C
Approved containers and cabinets reduce fire risk.
7. Which is considered a hazardous material?
A. Tap water
B. Sand
C. Corrosive acid
D. Office paper
Answer: C
Corrosive acids pose chemical burn and reaction hazards.
8. Containers holding hazardous materials must be labeled with:
A. Price and supplier
B. Chemical name and hazard warnings
C. Employee initials only
D. Date of purchase only
Answer: B
Labels identify contents and hazards for safe handling and
emergencies.
9. A spill response plan should include:
A. Only cleanup schedules
B. Emergency contacts and procedures
C. Employee vacation lists
D. Equipment maintenance logs
Answer: B
Clear procedures and contacts are critical during spills.
10. When transferring hazardous materials, employees should:
A. Rush to finish quickly
