Answer :
Final answer:
The correct measurement for flame spread of a surface material is using ASTM E84, which evaluates the flammability by observing flame spread along a material sample. The correct answer is option B.
Explanation:
The flame spread of a surface material is measured using ASTM E84, which is also known as the Standard Test Method for Surface Burning Characteristics of Building Materials. This test is used to assess the relative burning behavior of the material by observing the flame spread along a sample in order to classify the material's flammability.
Other options listed, such as ASTM E119, ASTM A36, and NFPA 265 are standards for different tests. ASTM E119 pertains to the fire resistance of building elements, ASTM A36 defines carbon structural steel properties, and NFPA 265 relates to evaluating the textile and films flame spread used in sleeping areas. Therefore, the correct answer is B. ASTM E84.