What is the significance of using a sieve with a larger opening than #200?

• A. It allows for a more accurate measurement
• B. It reduces potential damage under the smaller screen
• C. It eliminates the need for agitating the sample
• D. It speeds up the washing process

Answer: (B)

Using a sieve with a larger opening than #200 is significant because it reduces potential damage under the smaller screen. When materials are passed through a sieve with a larger opening, it minimizes the risk of clogging and physical strain on both the sieve and the sample being analyzed. Smaller openings can trap finer particles, creating pressure and potentially leading to breakage or distortion of the sieve mesh. By selecting a sieve with larger openings, you ensure a more efficient processing of the samples while protecting the integrity of both the sieve and the materials being processed. This choice enhances durability and maintains the sieve’s functionality over time, particularly in hydraulically dynamic processes like washing and separation.

The other choices do not address the primary concern of protecting the sieve and the sample during analysis effectively. They focus instead on measurement accuracy, agitation, and speed, which are secondary considerations rather than the fundamental benefit of using a sieve with larger openings.