CFI Hazardous Materials Storage 2 — Questions and Answers
Question 1: Under NFPA 30, what is the maximum allowable quantity of Class IB flammable liquids in a sprinklered inside storage room?
- 120 gallons
- 240 gallons (Correct answer)
- 500 gallons
- 1,000 gallons
Correct answer: 240 gallons
NFPA 30 permits up to 240 gallons of Class IB flammable liquids in a sprinklered inside storage room.
Question 2: Which hazard class label is required on containers storing oxidizers?
- Class 1 — Explosive
- Class 5.1 — Oxidizer (Correct answer)
- Class 3 — Flammable Liquid
- Class 8 — Corrosive
Correct answer: Class 5.1 — Oxidizer
DOT and NFPA require the Class 5.1 Oxidizer label on containers storing oxidizing materials.
Question 3: What is the primary purpose of a flammable liquids storage cabinet?
- To prevent ignition of vapors inside the cabinet
- To limit fire exposure time to contents from an external fire (Correct answer)
- To provide secondary containment for spills
- To cool liquids below their flash point
Correct answer: To limit fire exposure time to contents from an external fire
Storage cabinets are designed to protect contents from external fire for at least 10 minutes, limiting fuel contribution.
Question 4: NFPA 400 governs the storage of which category of materials?
- Flammable and combustible liquids only
- Compressed gases only
- Hazardous materials broadly including oxidizers, corrosives, and toxics (Correct answer)
- Explosives and blasting agents only
Correct answer: Hazardous materials broadly including oxidizers, corrosives, and toxics
NFPA 400 is the Hazardous Materials Code covering a broad range of hazardous material categories including oxidizers, corrosives, and toxic substances.
Question 5: When inspecting compressed gas cylinder storage, which condition is an immediate violation?
- Cylinders stored outdoors under a canopy
- Full and empty cylinders stored in the same area with proper labeling
- Oxygen cylinders stored within 5 feet of flammable gas cylinders without a barrier (Correct answer)
- Cylinders chained to a wall in an upright position
Correct answer: Oxygen cylinders stored within 5 feet of flammable gas cylinders without a barrier
NFPA 55 and CGA guidelines require a minimum 20-foot separation or a 5-foot non-combustible barrier between oxygen and flammable gas cylinders.
Question 6: What does the term 'maximum allowable quantity' (MAQ) refer to in hazardous materials storage?
- The total weight of all hazardous materials on site
- The quantity threshold below which a control area classification does not require special construction (Correct answer)
- The largest container size approved for a given chemical
- The maximum daily use rate permitted by the fire code
Correct answer: The quantity threshold below which a control area classification does not require special construction
The MAQ is the maximum amount of a hazardous material allowed in a control area before stricter code requirements for construction and suppression apply.
Question 7: Which document must be available to responding firefighters that identifies all hazardous materials stored at a facility?
- Certificate of Occupancy
- Material Safety Data Sheet (SDS) binder or equivalent hazmat inventory (Correct answer)
- Building permit
- Zoning variance letter
Correct answer: Material Safety Data Sheet (SDS) binder or equivalent hazmat inventory
IFC and NFPA require facilities to maintain an SDS library and hazmat inventory accessible to emergency responders.
CFI Hazardous Materials Storage 2
Under NFPA 30, what is the maximum allowable quantity of Class IB flammable liquids in a sprinklered inside storage room?