What is the total fuel capacity in engine room #1?

• A. 36,000 gal
• B. 38,000 gal
• C. 40,000 gal
• D. 42,000 gal

Answer: (C)

Total fuel capacity is found by adding up the volumes of every fuel tank located in engine room #1. To determine the correct total, you review the fuel system data (drawings or a tank list) and sum each tank’s capacity that resides in that room, making sure not to count tanks outside the room or omit any tanks inside it. The capacity figure represents the maximum volume the tanks can hold when full, so ullage or usable-fuel subtracts from what is in service, not from the stated capacity.

If you have a combination like two tanks of 20,000 gallons each or four tanks of 10,000 gallons each inside engine room #1, the total would be 40,000 gallons, which is why that answer matches the data for the room. Always verify you’re including all tanks in that engine room and using the correct unit (US gallons).