Sieve shaker must provide sieving adequacy within a reasonable time (10 minutes or less).

• A. True
• B. False
• C. Not specified
• D. Depends on material

Answer: (A)

In sieve analysis, the goal is to obtain a reliable, representative separation of material by size in a practical, repeatable amount of time. The shaker is expected to achieve the necessary sieving of the sample within a reasonable window, typically around 10 minutes or less. This keeps results consistent and makes the testing workflow efficient; it prevents over-processing that could alter particle sizes or cause unnecessary delays.

If the material can’t achieve the required separation within that time, it points to issues such as moisture causing clumping, overly friable material that may break down with extended shaking, or the need to recondition the sample (drying, proper pre‑conditioning) or adjust the shaker settings. The emphasis is on getting accurate gradation without lengthy or destructive processing.

So the statement is true because, in practice, sieving adequacy should be reached within a reasonable, standardized time to ensure consistent, repeatable results.