What is the method of passing the sample through a uniform mesh to separate particles by size?

• A. Sieving
• B. Pulverizing
• C. Macerating
• D. Milling

Answer: (A)

Sieving uses a screen with uniform openings to separate particles by size. As you agitate the sample, particles smaller than the openings pass through the mesh while larger ones stay on top. This creates size-based fractions and is a common way to assess particle size distribution in powders and granules. It differs from methods like pulverizing, milling, or macerating, which focus on breaking particles into smaller pieces rather than separating a mixture by size with a screen.