FDNY C92 Supervision of
Flammable/Combustible Liquids Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following is considered a Class I flammable liquid
according to NFPA 30?
A. Diesel fuel
B. Kerosene
C. Gasoline
D. Fuel oil
Rationale: Class I liquids have a flashpoint below 100°F. Gasoline is
classified as Class I because its flashpoint is well below this threshold.
2. What is the minimum distance required between a Class I liquid
storage tank and a building according to NFPA 30?
, A. 10 feet
B. 20 feet
C. 50 feet
D. 100 feet
Rationale: NFPA 30 requires a minimum of 50 feet between Class I
liquid storage tanks and any building for safety from fire and explosion
hazards.
3. Which type of container is preferred for transporting flammable
liquids?
A. Cardboard drum
B. Approved metal container
C. Glass jar
D. Open-top plastic container
Rationale: Approved metal containers are designed to safely handle
flammable liquids, prevent leaks, and reduce fire hazards.
4. What does the term "flashpoint" refer to?
A. Temperature at which a liquid boils
B. Temperature at which a liquid evaporates
C. Lowest temperature at which vapors ignite
D. Temperature at which liquid freezes
Rationale: The flashpoint is the lowest temperature at which a liquid
produces enough vapor to ignite in the presence of an ignition source.
,5. Which of the following is a key requirement for a flammable liquid
storage room?
A. Must be located underground
B. Must be ventilated to the street
C. Must have explosion-proof electrical fixtures
D. Must have open flames for heating
Rationale: Explosion-proof fixtures prevent sparks in areas where
flammable vapors may accumulate, reducing fire risk.
6. How should small spills of flammable liquids be cleaned?
A. Wash with water immediately
B. Sweep into open trash
C. Use absorbent materials designed for flammable liquids
D. Leave to evaporate
Rationale: Absorbent materials safely contain and remove flammable
liquids without creating additional fire hazards.
7. What is the proper action if a flammable liquid catches fire?
A. Use water
B. Use a Class B fire extinguisher
C. Smother with a blanket
D. Pour more liquid on it
Rationale: Class B extinguishers are designed for flammable liquid fires
and work by smothering the flames or breaking the chemical reaction.
, 8. Which of the following liquids is classified as Class II combustible?
A. Gasoline
B. Kerosene
C. Acetone
D. Ethanol
Rationale: Class II combustible liquids have a flashpoint between 100°F
and 140°F. Kerosene falls into this category.
9. What is the primary hazard of flammable liquid vapors?
A. Toxicity only
B. Explosion and fire
C. Environmental contamination only
D. Corrosion
Rationale: Vapors can ignite, leading to explosions and fire hazards.
10. According to FDNY rules, which of the following must be
maintained in a flammable liquid storage area?
A. Fire extinguisher readily accessible
B. Open flame for testing
C. Unlabeled containers
D. Wooden shelving
Rationale: Fire extinguishers must be accessible to allow immediate
response to any fire incident.
11. Which of the following is a requirement for secondary
containment of flammable liquids?
Flammable/Combustible Liquids Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following is considered a Class I flammable liquid
according to NFPA 30?
A. Diesel fuel
B. Kerosene
C. Gasoline
D. Fuel oil
Rationale: Class I liquids have a flashpoint below 100°F. Gasoline is
classified as Class I because its flashpoint is well below this threshold.
2. What is the minimum distance required between a Class I liquid
storage tank and a building according to NFPA 30?
, A. 10 feet
B. 20 feet
C. 50 feet
D. 100 feet
Rationale: NFPA 30 requires a minimum of 50 feet between Class I
liquid storage tanks and any building for safety from fire and explosion
hazards.
3. Which type of container is preferred for transporting flammable
liquids?
A. Cardboard drum
B. Approved metal container
C. Glass jar
D. Open-top plastic container
Rationale: Approved metal containers are designed to safely handle
flammable liquids, prevent leaks, and reduce fire hazards.
4. What does the term "flashpoint" refer to?
A. Temperature at which a liquid boils
B. Temperature at which a liquid evaporates
C. Lowest temperature at which vapors ignite
D. Temperature at which liquid freezes
Rationale: The flashpoint is the lowest temperature at which a liquid
produces enough vapor to ignite in the presence of an ignition source.
,5. Which of the following is a key requirement for a flammable liquid
storage room?
A. Must be located underground
B. Must be ventilated to the street
C. Must have explosion-proof electrical fixtures
D. Must have open flames for heating
Rationale: Explosion-proof fixtures prevent sparks in areas where
flammable vapors may accumulate, reducing fire risk.
6. How should small spills of flammable liquids be cleaned?
A. Wash with water immediately
B. Sweep into open trash
C. Use absorbent materials designed for flammable liquids
D. Leave to evaporate
Rationale: Absorbent materials safely contain and remove flammable
liquids without creating additional fire hazards.
7. What is the proper action if a flammable liquid catches fire?
A. Use water
B. Use a Class B fire extinguisher
C. Smother with a blanket
D. Pour more liquid on it
Rationale: Class B extinguishers are designed for flammable liquid fires
and work by smothering the flames or breaking the chemical reaction.
, 8. Which of the following liquids is classified as Class II combustible?
A. Gasoline
B. Kerosene
C. Acetone
D. Ethanol
Rationale: Class II combustible liquids have a flashpoint between 100°F
and 140°F. Kerosene falls into this category.
9. What is the primary hazard of flammable liquid vapors?
A. Toxicity only
B. Explosion and fire
C. Environmental contamination only
D. Corrosion
Rationale: Vapors can ignite, leading to explosions and fire hazards.
10. According to FDNY rules, which of the following must be
maintained in a flammable liquid storage area?
A. Fire extinguisher readily accessible
B. Open flame for testing
C. Unlabeled containers
D. Wooden shelving
Rationale: Fire extinguishers must be accessible to allow immediate
response to any fire incident.
11. Which of the following is a requirement for secondary
containment of flammable liquids?
