What indicates a failed visible sediment test?

What indicates a failed visible sediment test?

• A. A Solid, Unbroken Line of Sediment Greater Than 1/8 Inch Along the Intersection of the Bottom and Side Wall of the Sample.
• B. A Thin Film of Sediment Only
• C. Sediment That Forms at the Top
• D. No Visible Sediment

Answer: (A)

In a visible sediment test, what matters is how much sediment has settled and how it appears along the bottom where the wall meets the floor of the sample. A solid, unbroken line of sediment that runs along that intersection and is longer than 1/8 inch shows a substantial amount of solid material has settled out, which indicates the sample has failed the test. This continuous line means contamination or insoluble material present in excess of acceptable limits. If you only see a thin film of sediment, that’s not enough to mark a failure—it indicates only a small amount of settled material. Sediment forming at the top isn’t what this test looks for, and no visible sediment means the sample is clean regarding this criterion.

In a visible sediment test, what matters is how much sediment has settled and how it appears along the bottom where the wall meets the floor of the sample. A solid, unbroken line of sediment that runs along that intersection and is longer than 1/8 inch shows a substantial amount of solid material has settled out, which indicates the sample has failed the test. This continuous line means contamination or insoluble material present in excess of acceptable limits.

If you only see a thin film of sediment, that’s not enough to mark a failure—it indicates only a small amount of settled material. Sediment forming at the top isn’t what this test looks for, and no visible sediment means the sample is clean regarding this criterion.