Warning Condition BS&W corresponds to which of the following?

• A. S <0.1% and C 0.2<0.4%
• B. S <0.1% and C <0.2%
• C. S >0.1% and C >0.4%
• D. S <0.01% and C <0.2%

Answer: (A)

BS&W refers to Bottom Sediment and Water in fuel, and warning conditions are defined by specific thresholds for sediment (S) and water (C) content. The correct combination is when sediment is very low (S < 0.1%) and water is present in a moderate range (0.2% < C < 0.4%). This tells you that water contamination is detectable and of concern, but sediment isn’t driving the issue, placing the sample in a warning regime rather than a more severe alert. If water were below 0.2%, there wouldn’t be enough water to trigger the warning; if water were above 0.4%, it would push into a higher severity level. If sediment were above 0.1%, the contamination profile would also shift away from this warning boundary.