According to 33 CFR Part 155, to prevent the overflow of cargo tanks due to thermal expansion, to what is the maximum level that cargo tanks are allowed to be filled for topping-off purposes?

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to a level corresponding to 98.5 % of the cargo tank volume

Answer

to a level corresponding to the bottom of the expansion trunk

Answer

to a level corresponding to 1 to 3 inches from the tank top

Answer

to a level corresponding to 1 to 3 inches from top of the vent pipe

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