Your ship has loaded 8,000 barrels of gasoline at a cargo temperature of 85? F, departing Aruba bound for New Jersey. API gravity is 55?. The volume correction factor (VCF) is .0006. How many gallons would you expect to unload if the cargo temperature is 50? F at the discharge port?
• Thermal expansion/contraction of liquids and how temperature change affects volume • How to convert barrels to gallons accurately for petroleum cargoes • Using a volume correction factor (VCF) with a given temperature change
• First, change the cargo quantity from barrels to gallons before doing any temperature correction—what fixed conversion factor do you use for petroleum barrels? • Find the temperature difference between loading and discharge. How does that difference, combined with the VCF, affect the original volume—do you expect more or fewer gallons at the cooler temperature? • Once you adjust the original volume for temperature, compare your result to the answer choices. Which choice is closest after rounding?
• Compute total gallons at loading correctly from 8,000 barrels before applying any correction • Use the correct sign for the temperature change (is the cargo cooling or warming?) when applying the VCF • Be sure you apply the VCF to the temperature difference, not directly to the temperature values themselves
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