Tankerman · Cargo Calculations — Free Water
A tank gauges a Total Observed Volume (TOV) of 5,000 barrels, including 50 barrels of free water found by water-finding paste. What is the Gross Observed Volume (GOV) of oil?
- A4,950 barrels✓ Correct
- B5,050 barrels
- C5,000 barrels
- D50 barrels
Explanation
Gross Observed Volume = Total Observed Volume − Free Water = 5,000 − 50 = 4,950 barrels. Free water (settled at the bottom) is cut from the TOV before applying temperature corrections.
Authority: API MPMS Ch. 12 (Calculation of Petroleum Quantities)
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