Tankerman · Cargo Calculations — Volume Correction Factor
The Gross Observed Volume is 4,950 barrels and the Volume Correction Factor (VCF) for the observed temperature is 0.9900. What is the Gross Standard Volume (at 60°F)?
- A5,000.0 barrels
- B4,900.5 barrels✓ Correct
- C4,999.5 barrels
- D49.5 barrels
Explanation
Gross Standard Volume = GOV × VCF = 4,950 × 0.9900 = 4,900.5 barrels. The VCF (from API/ASTM tables, keyed to API gravity and temperature) corrects the observed volume to the 60°F standard, since petroleum expands and contracts with temperature.
Authority: API MPMS Ch. 11/12; ASTM-IP 54 tables
Practice the full Tankerman bank
Free spaced-repetition quizzing across 2550 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Tankerman questions
- Transfer — PIC
During a cargo transfer on a tank vessel, the Person-In-Charge (PIC) is primarily responsible for:
- Transfer — DOI
Before a transfer of oil or hazardous material begins, the PICs of the transferring and receiving facilities must complete and agree on a:
- Safety — Inert Gas
The purpose of an inert gas system on a tanker is to:
- Safety — Inert Gas
A cargo tank is generally considered properly inerted when the oxygen content is held at or below:
- Safety — Flammability
A hydrocarbon vapor/air mixture will burn only when its concentration is:
- Safety — Static
To prevent a static-electricity ignition hazard during loading of a static-accumulating cargo, the tankerman should: