FDNY C91 Supervision of Storage,
Handling and Use of Hazardous
Materials Exam With Actual Questions
& Verified Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. Which NFPA standard provides guidelines for the storage of
flammable and combustible liquids?
a) NFPA 30
b) NFPA 70
c) NFPA 101
d) NFPA 25
Answer: a) NFPA 30
Rationale: NFPA 30 specifically addresses the safe storage of flammable
and combustible liquids, including design, handling, and containment
requirements.
2. What is the primary purpose of a Material Safety Data Sheet
(MSDS) or Safety Data Sheet (SDS)?
a) Provide chemical pricing
b) Outline safety and handling information
c) List fire department contacts
d) Track inventory levels
,Answer: b) Outline safety and handling information
Rationale: SDSs provide detailed information about chemical hazards,
handling procedures, storage requirements, and emergency measures.
3. When storing incompatible chemicals, what is the recommended
practice?
a) Store all on the same shelf
b) Keep them separated with proper barriers
c) Only label them
d) Place in the same container
Answer: b) Keep them separated with proper barriers
Rationale: Separation prevents chemical reactions that can cause fires,
explosions, or toxic releases.
4. Which type of fire extinguisher is appropriate for flammable
liquids?
a) Class A
b) Class B
c) Class C
d) Class D
Answer: b) Class B
Rationale: Class B extinguishers are designed for flammable liquids, oils,
and greases.
5. The primary route of exposure for volatile chemicals in a
warehouse is usually:
a) Ingestion
b) Inhalation
c) Injection
d) Absorption through skin
,Answer: b) Inhalation
Rationale: Vapors from volatile chemicals are often inhaled, making
respiratory protection and ventilation critical.
6. Which device helps prevent over-pressurization of storage tanks?
a) Pressure relief valve
b) Fire alarm
c) Thermometer
d) Flow meter
Answer: a) Pressure relief valve
Rationale: Pressure relief valves safely vent excess pressure to prevent
tank rupture or explosions.
7. What is the maximum allowable quantity (MAQ) concept in
hazardous materials storage?
a) Maximum per shipment allowed
b) Maximum quantity of a material stored in a single control area
c) Maximum fire pump capacity
d) Maximum spill cleanup volume
Answer: b) Maximum quantity of a material stored in a single control
area
Rationale: MAQ limits help reduce fire and exposure risks in case of an
incident.
8. Which ventilation system is preferred for areas storing volatile
chemicals?
a) Natural ventilation
b) Local exhaust ventilation
c) Air conditioning only
d) Ceiling fans
, Answer: b) Local exhaust ventilation
Rationale: Local exhaust captures vapors at the source, minimizing
exposure and reducing fire hazards.
9. What is the minimum labeling requirement for hazardous
chemical containers?
a) Manufacturer name only
b) Chemical name and hazard warnings
c) Storage location
d) Purchase date
Answer: b) Chemical name and hazard warnings
Rationale: Clear labeling ensures safe handling and compliance with
OSHA and NFPA requirements.
10. Which type of storage cabinet is required for flammable
liquids?
a) Wood cabinet
b) Explosion-proof metal cabinet
c) Glass cabinet
d) Open shelving
Answer: b) Explosion-proof metal cabinet
Rationale: Flammable liquids require cabinets that can contain vapors
and resist ignition sources.
11. The term “hazard class” in hazardous materials refers to:
a) The cost of the chemical
b) The type of hazard it presents
c) The storage location
d) The shipping route
Handling and Use of Hazardous
Materials Exam With Actual Questions
& Verified Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. Which NFPA standard provides guidelines for the storage of
flammable and combustible liquids?
a) NFPA 30
b) NFPA 70
c) NFPA 101
d) NFPA 25
Answer: a) NFPA 30
Rationale: NFPA 30 specifically addresses the safe storage of flammable
and combustible liquids, including design, handling, and containment
requirements.
2. What is the primary purpose of a Material Safety Data Sheet
(MSDS) or Safety Data Sheet (SDS)?
a) Provide chemical pricing
b) Outline safety and handling information
c) List fire department contacts
d) Track inventory levels
,Answer: b) Outline safety and handling information
Rationale: SDSs provide detailed information about chemical hazards,
handling procedures, storage requirements, and emergency measures.
3. When storing incompatible chemicals, what is the recommended
practice?
a) Store all on the same shelf
b) Keep them separated with proper barriers
c) Only label them
d) Place in the same container
Answer: b) Keep them separated with proper barriers
Rationale: Separation prevents chemical reactions that can cause fires,
explosions, or toxic releases.
4. Which type of fire extinguisher is appropriate for flammable
liquids?
a) Class A
b) Class B
c) Class C
d) Class D
Answer: b) Class B
Rationale: Class B extinguishers are designed for flammable liquids, oils,
and greases.
5. The primary route of exposure for volatile chemicals in a
warehouse is usually:
a) Ingestion
b) Inhalation
c) Injection
d) Absorption through skin
,Answer: b) Inhalation
Rationale: Vapors from volatile chemicals are often inhaled, making
respiratory protection and ventilation critical.
6. Which device helps prevent over-pressurization of storage tanks?
a) Pressure relief valve
b) Fire alarm
c) Thermometer
d) Flow meter
Answer: a) Pressure relief valve
Rationale: Pressure relief valves safely vent excess pressure to prevent
tank rupture or explosions.
7. What is the maximum allowable quantity (MAQ) concept in
hazardous materials storage?
a) Maximum per shipment allowed
b) Maximum quantity of a material stored in a single control area
c) Maximum fire pump capacity
d) Maximum spill cleanup volume
Answer: b) Maximum quantity of a material stored in a single control
area
Rationale: MAQ limits help reduce fire and exposure risks in case of an
incident.
8. Which ventilation system is preferred for areas storing volatile
chemicals?
a) Natural ventilation
b) Local exhaust ventilation
c) Air conditioning only
d) Ceiling fans
, Answer: b) Local exhaust ventilation
Rationale: Local exhaust captures vapors at the source, minimizing
exposure and reducing fire hazards.
9. What is the minimum labeling requirement for hazardous
chemical containers?
a) Manufacturer name only
b) Chemical name and hazard warnings
c) Storage location
d) Purchase date
Answer: b) Chemical name and hazard warnings
Rationale: Clear labeling ensures safe handling and compliance with
OSHA and NFPA requirements.
10. Which type of storage cabinet is required for flammable
liquids?
a) Wood cabinet
b) Explosion-proof metal cabinet
c) Glass cabinet
d) Open shelving
Answer: b) Explosion-proof metal cabinet
Rationale: Flammable liquids require cabinets that can contain vapors
and resist ignition sources.
11. The term “hazard class” in hazardous materials refers to:
a) The cost of the chemical
b) The type of hazard it presents
c) The storage location
d) The shipping route
