The capacity of the fuel head tank above Generator Room 3 is expressed in which unit?

The capacity of the fuel head tank above Generator Room 3 is expressed in which unit?

• A. liters
• B. barrels
• C. quarts
• D. gallons

Answer: (D)

The capacity of a shipboard fuel head tank is expressed in gallons because, in U.S. Navy and many marine systems, fuel quantities are typically given in US customary units. A head tank is a relatively small reservoir, so gallons provide a convenient, easily readable measure for sizing, fueling, and gauging the system. Barrels are used for large bulk storage, which doesn’t fit a small head tank. Quarts would be too small a unit for a tank of this purpose, and liters represent a metric system not commonly used in this context. So gallons is the appropriate, standard unit.

The capacity of a shipboard fuel head tank is expressed in gallons because, in U.S. Navy and many marine systems, fuel quantities are typically given in US customary units. A head tank is a relatively small reservoir, so gallons provide a convenient, easily readable measure for sizing, fueling, and gauging the system. Barrels are used for large bulk storage, which doesn’t fit a small head tank. Quarts would be too small a unit for a tank of this purpose, and liters represent a metric system not commonly used in this context. So gallons is the appropriate, standard unit.