Prior to refueling from a non-DOD source, how many tests must be conducted?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (C)

Before refueling from a non-DOD source, you perform four tests to ensure the fuel is safe for the ship’s systems and the operation. First, a water content test to detect free water, which can cause corrosion, microbial growth, or fuel separation. Second, a sediment/contaminant check to find particulates that could clog filters and injectors. Third, a verification of fuel properties against required specifications (such as density, viscosity, or flash point) to confirm the fuel will perform properly and be within safe handling limits. Fourth, a contamination or compatibility assessment to ensure there are no improper additives or contaminants that could damage storage tanks, seals, or engine components. These checks collectively protect the equipment and mission, which is why four tests are required.