In the filter element status scale, which color corresponds to the 0-20 range and indicates the elements are clean?

In the filter element status scale, which color corresponds to the 0-20 range and indicates the elements are clean?

• A. Red
• B. Blue
• C. Green
• D. Yellow

Answer: (C)

In a color-coded filter status system, colors quickly show how the element is performing without reading numbers in detail. A 0-20 range represents the lowest contamination level, meaning the filter is performing cleanly and within specifications. Green is used to signal this good, ready-to-use condition, so no maintenance action is needed. The idea behind the color scheme is to let a technician glance at the element and know instantly that it’s acceptable. Red would typically mean urgent action due to high contamination, yellow would indicate caution or approaching limits, and blue (if used) often marks another status not requiring immediate replacement. So, green is the color that corresponds to the clean, 0-20 range.

In a color-coded filter status system, colors quickly show how the element is performing without reading numbers in detail. A 0-20 range represents the lowest contamination level, meaning the filter is performing cleanly and within specifications. Green is used to signal this good, ready-to-use condition, so no maintenance action is needed. The idea behind the color scheme is to let a technician glance at the element and know instantly that it’s acceptable. Red would typically mean urgent action due to high contamination, yellow would indicate caution or approaching limits, and blue (if used) often marks another status not requiring immediate replacement. So, green is the color that corresponds to the clean, 0-20 range.