Your vessel has taken on 25,000 gallons of fuel with an API gravity of 35.1 at 60°F. Using the table shown in the illustration, how many long tons of fuel has been actually taken on board? See illustration GS-0149.
• Use the API gravity 35.1° row in the table to find pounds per U.S. gallon at 60°F • Convert gallons of fuel to total pounds of fuel using the table value • Convert pounds to long tons, remembering that 1 long ton = 2,240 lb
• From 25,000 gallons and the table’s pounds-per-gallon value, what is the total weight in pounds? • After you have total pounds, how do you convert that weight into long tons, and which choice is closest to your result? • Is any interpolation between table values needed for 35.1°, or is there an exact entry you can use directly?
• Be sure you are using pounds per U.S. gallon, not the gallons-per-pound column • Use the correct conversion: 1 long ton = 2,240 lb, not short tons or metric tons • Double-check your multiplication (gallons × lb/gal) and division (lb ÷ 2,240) to avoid simple arithmetic slips
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