NFPA 704 Hazardous Materials Identification Flashcards
7 cards from real NFPA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 NFPA 704 Hazardous Materials Identification flashcards as text
In NFPA 704, the symbol 'W' with a horizontal line through it (W̄) in the white section indicates:
Answer: The material reacts dangerously or unusually with water
The W with a bar through it indicates that the material reacts with water in an unusual or dangerous manner, warning responders not to use water for firefighting.
What does the symbol 'OX' or 'OXY' in the white section of an NFPA 704 diamond indicate?
Answer: The material is an oxidizer that can intensify fires
OX or OXY in the white section identifies the material as an oxidizer, which can cause or enhance combustion of other materials and may react violently with fuels.
What is the primary purpose of the NFPA 704 standard?
Answer: To provide emergency responders with immediate visual hazard identification
NFPA 704 is designed to give emergency responders quick, visual identification of hazards during fires or spills so they can take appropriate protective action.
Where is the NFPA 704 placard most commonly and appropriately displayed?
Answer: On stationary containers, storage tanks, and building entrances where hazardous materials are stored or used
NFPA 704 placards are placed on fixed facilities such as storage tanks, containers, and buildings to alert emergency responders before they enter a hazardous area.
What does the symbol 'SA' in the white section of an NFPA 704 diamond indicate?
Answer: Simple asphyxiant gas
SA stands for Simple Asphyxiant and identifies gases such as nitrogen or helium that displace oxygen and can cause suffocation without being otherwise toxic.
If a material has an NFPA 704 rating of 3-4-2-OX, which single hazard category has the most severe numerical rating?
Answer: Flammability (4)
A flammability rating of 4 is the highest numerical value in this combination, indicating the material burns readily at ambient conditions.
Who is primarily responsible for determining the correct NFPA 704 ratings for a hazardous material?
Answer: The manufacturer or supplier of the material
The manufacturer or supplier of a material is responsible for determining the appropriate NFPA 704 hazard ratings based on the material's properties and providing this information on safety data sheets.