NFPA NFPA 30 Flammable and Combustible Liquids 2 — Questions and Answers
Question 1: Under NFPA 30, what bonding and grounding requirement applies when transferring Class I flammable liquids from one container to another?
- No bonding required for containers under 5 gallons
- Containers must be bonded together and grounded to prevent static sparks (Correct answer)
- Only the receiving container needs grounding
- Bonding is required only for metal containers
Correct answer: Containers must be bonded together and grounded to prevent static sparks
NFPA 30 requires that both containers be bonded to each other and that the system be grounded to prevent static electricity discharge during transfer.
Question 2: According to NFPA 30, what type of electrical equipment is required in a flammable liquid storage room classified as a Division 1 hazardous location?
- Standard commercial grade
- Explosion-proof or intrinsically safe (Correct answer)
- GFCI-protected only
- Weatherproof only
Correct answer: Explosion-proof or intrinsically safe
NFPA 30 requires explosion-proof or intrinsically safe electrical equipment in Division 1 hazardous locations where flammable vapors may be present.
Question 3: Under NFPA 30, how must flammable liquid storage rooms be ventilated?
- Natural ventilation only is acceptable
- Mechanical ventilation providing at least 1 cfm per square foot of floor area (Correct answer)
- Ventilation is not required if quantities are below 60 gallons
- Exhaust fan rated for 500 cfm minimum
Correct answer: Mechanical ventilation providing at least 1 cfm per square foot of floor area
NFPA 30 requires flammable liquid storage rooms to have mechanical ventilation providing at least 1 cubic foot per minute per square foot of floor area.
Question 4: According to NFPA 30, what is the maximum quantity of Class IA liquids permitted in a processing area without a sprinkler system?
- 1 gallon
- 5 gallons (Correct answer)
- 10 gallons
- 25 gallons
Correct answer: 5 gallons
NFPA 30 limits the quantity of Class IA flammable liquid in unsprinklered processing areas to 5 gallons.
Question 5: Under NFPA 30, underground storage tanks must be equipped with which device to prevent overflow during filling?
- Check valve
- Pressure relief valve
- Overfill prevention device (Correct answer)
- Ball valve with tamper switch
Correct answer: Overfill prevention device
NFPA 30 requires underground storage tanks to have overfill prevention devices to automatically stop or signal when the tank reaches 90–95% capacity.
Question 6: According to NFPA 30, what is required for flammable liquid dispensing areas to prevent static ignition?
- All metal equipment must be painted with conductive paint
- Conductive flooring must be used throughout
- The dispensing nozzle must be bonded to the container before dispensing (Correct answer)
- Rubber gloves must be worn by all personnel
Correct answer: The dispensing nozzle must be bonded to the container before dispensing
NFPA 30 requires the dispensing nozzle to be bonded to the receiving container prior to opening the dispensing valve to prevent static sparks.
NFPA NFPA 30 Flammable and Combustible Liquids 2
Under NFPA 30, what bonding and grounding requirement applies when transferring Class I flammable liquids from one container to another?