CFPS Fire Hazard Management 2 — Questions and Answers
Question 1: A flammable liquid with a flash point below 73°F (23°C) and a boiling point below 100°F (38°C) is classified under NFPA 30 as which category?
- Class IA (Correct answer)
- Class IB
- Class IC
- Class II
Correct answer: Class IA
NFPA 30 classifies flammable liquids with flash point below 73°F and boiling point below 100°F as Class IA, the most volatile category.
Question 2: Which fire hazard analysis method uses an inductive, bottom-up approach to identify how individual component failures can lead to system-level fire incidents?
- Fault Tree Analysis (FTA)
- Failure Mode and Effects Analysis (FMEA) (Correct answer)
- Hazard and Operability Study (HAZOP)
- What-If Analysis
Correct answer: Failure Mode and Effects Analysis (FMEA)
FMEA is a bottom-up, inductive method that evaluates individual component failure modes and their effects on overall system safety.
Question 3: When conducting a pre-fire plan for a warehouse storing aerosol products, the MOST critical hazard to document is:
- The number of dock doors available for firefighter access
- The presence and classification level of aerosol products stored (Correct answer)
- The square footage of the building footprint
- The age of the building's electrical system
Correct answer: The presence and classification level of aerosol products stored
Aerosol products can be classified as Level 1, 2, or 3 based on flammable content, which dramatically affects suppression system design and firefighting tactics.
Question 4: A dust explosion requires five elements often described as the 'Dust Explosion Pentagon.' Which element is present in a dust explosion but NOT in a standard fire triangle?
- Fuel
- Oxygen
- Ignition source
- Dispersion and confinement (Correct answer)
Correct answer: Dispersion and confinement
The Dust Explosion Pentagon adds dispersion of dust particles and confinement to the classic fire triangle elements of fuel, oxygen, and ignition source.
Question 5: Under NFPA 13, which occupancy classification requires the highest design density for sprinkler systems due to the greatest fire hazard potential?
- Light Hazard
- Ordinary Hazard Group 1
- Ordinary Hazard Group 2
- Extra Hazard Group 2 (Correct answer)
Correct answer: Extra Hazard Group 2
Extra Hazard Group 2 occupancies involve flammable and combustible liquids or fast-burning materials requiring the highest sprinkler design densities under NFPA 13.
Question 6: A fire protection engineer is assessing a rack storage facility. Which variable has the MOST significant impact on the fire hazard classification of stored commodities?
- Pallet material (wood vs. plastic)
- Storage height
- Commodity packaging and plastic content (Correct answer)
- Aisle width between racks
Correct answer: Commodity packaging and plastic content
Commodity classification in NFPA 13 is primarily determined by the product's packaging material, particularly the proportion and type of plastic content.
Question 7: Which term describes the minimum concentration of a flammable gas or vapor in air below which ignition will NOT propagate?
- Upper Flammable Limit (UFL)
- Lower Flammable Limit (LFL) (Correct answer)
- Flash point
- Autoignition temperature
Correct answer: Lower Flammable Limit (LFL)
The Lower Flammable Limit (LFL) is the minimum fuel-air concentration below which the mixture is too lean to sustain flame propagation.
CFPS Fire Hazard Management 2
A flammable liquid with a flash point below 73°F (23°C) and a boiling point below 100°F (38°C) is classified under NFPA 30 as which category?