Which statement is true about sieve size and particle size?

• A. A smaller sieve number corresponds to a smaller particle size
• B. A larger sieve number corresponds to a smaller particle size
• C. Sieve size does not relate to particle size
• D. Sieve size only affects color

Answer: (B)

In sieve analysis, the size of the openings in a sieve determines what size particles can pass through. The sieve number is inversely related to the hole size: higher mesh numbers mean smaller openings. So a sieve with a larger number will only let the smallest particles go through, while larger particles are retained on the coarser screens above. As you move to progressively finer sieves (higher numbers), the particle size that can pass through becomes smaller. That’s why this statement is true: a larger sieve number corresponds to a smaller particle size.