单项选择题
A.The pressure-vacuum relief valve should be reset
B.The tanks should be made seaworthy to prevent contamination
C.The tanks should be sounded to make sure the levels are not rising
D.The tanks should be marked with a bull stamp on the manifold filling valve
单项选择题 The most critical part of the bunkering operations, which can result in an oil spill, is when the （）
单项选择题 During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（）
单项选择题 Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?（）