In terms of the diesel fuels burned in auxiliary and main propulsion diesel engines onboard vessels, which of the listed fuel properties would be most critical to consider when transferring and forwarding fuel in extremely low ambient temperature conditions?
• Behavior of diesel fuel at very low temperatures • Difference between flash point (ignition/fire safety) and pour point (low‑temperature flow characteristics) • Fuel system issues such as waxing, gelling, and loss of flow in cold conditions
• When you are pumping fuel through lines and filters on a very cold day, what specific behavior of the fuel would cause flow to slow or stop? • Which listed property directly relates to the lowest temperature at which the fuel will still flow instead of becoming semi‑solid? • Among the answer choices, which properties are more about combustion and safety, and which are about physical ability to move the fuel?
• Identify which property describes the temperature below which fuel stops flowing under gravity or pumping. • Eliminate properties that mainly affect engine efficiency or fire hazard rather than cold‑weather handling. • Confirm which property is used in cold‑flow specifications for diesel fuels used in Arctic or winter conditions.
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