Question 76Safety & Environmental - Assistant Engineer

The correct answer is B) A temperature rise of the fuel will cause an overflow from the tank vent. This is correct because as fuel is loaded into a cold double bottom fuel oil tank, the temperature of the fuel will increase. As the fuel warms up, it will expand, causing the volume to increase. If the tank is topped off, this expansion will cause the fuel to overflow through the tank vent, potentially leading to a spill. The other answer choices are incorrect because: A) Increased viscosity is not the issue here, the problem is the expansion of the fuel volume. C) The fueling valve becoming stuck is not the primary concern with topping off cold tanks. D) Air pockets are not the reason for fuel bubbling out of the ullage hole in this scenario.