In SFRM density testing, the dry weight is measured to the nearest 0.1 g.

• A. 0.01 g
• B. 0.1 g
• C. 1 g
• D. 0.5 g

Answer: (B)

Understanding measurement precision is key here. If the procedure says the dry weight is measured to the nearest 0.1 g, you report the weight in 0.1 g steps (for example, 12.3 g, 12.4 g, etc.). This level of precision matches the instrument’s readability and provides enough accuracy for calculating density without demanding more precision than necessary. A reading of 0.01 g would require a scale with finer resolution than stated, while 1 g or 0.5 g would be too coarse to meet the testing standard.