What two materials is flame spread based on?

What two materials is flame spread based on?

• A. Copper (0 Rating) and Pine Wood (100 Rating)
• B. Asbestos (0 Rating) and Red Oak Wood (100 Rating)
• C. Aluminum (0 Rating) and Maple Wood (50 Rating)
• D. Ceramic (0 Rating) and Teak Wood (80 Rating)

Answer: (B)

Flame spread ratings show how quickly a material’s surface can transmit fire. The scale runs from near zero for noncombustible materials to high values for materials that burn and spread flames readily. Asbestos is noncombustible and is assigned a flame spread rating of 0, while red oak wood is highly combustible and rated at the top end of the scale (100). This pairing clearly illustrates the two extremes of flame spread behavior, which is why it’s the best choice. The other options mix materials that don’t demonstrate this extreme contrast or don’t consistently align with the standard rating approach.

Flame spread ratings show how quickly a material’s surface can transmit fire. The scale runs from near zero for noncombustible materials to high values for materials that burn and spread flames readily. Asbestos is noncombustible and is assigned a flame spread rating of 0, while red oak wood is highly combustible and rated at the top end of the scale (100). This pairing clearly illustrates the two extremes of flame spread behavior, which is why it’s the best choice. The other options mix materials that don’t demonstrate this extreme contrast or don’t consistently align with the standard rating approach.