Question 80Safety & Environmental - Assistant Engineer

The correct answer is B) tanks are being topped off. During bunkering operations, the most critical part that can result in an oil spill is when the tanks are being topped off. This is because as the tanks near full capacity, there is an increased risk of overflow or spillage, especially if the tank level monitoring is not closely watched. Overfilling the tanks can cause product to be discharged onto the deck or into the water, leading to a potential oil spill. The other options are not as critical for causing an oil spill. A) Starting the pumping operation is a routine step, C) lining up the system is necessary but not as risky, and D) making up hose joints, while important, is less likely to directly lead to an oil spill compared to topping off the tanks.