Fuel density is easily checked on board ship to facilitate proper fuel treatment. What is the maximum fuel density at 15C allowed for proper centrifugation to take place? 3
Official USCG Answer & Rule Citation
Correct Answer: Option C — 991 kg/m 3
Centrifugal fuel purifiers rely on density differences to separate water and contaminants from fuel. A density limit of 991 kg/m³ at 15°C is the standard operational threshold for most marine separators. Exceeding this density makes effective separation physically impossible, risking engine damage from water and particulate matter contamination.
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