Engine General (Supplementary) USCG Question #1632 (Set 30)

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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