Why does the specific gravity (density) of the liquid cargo matter when calculating how much can be safely loaded into a given tank?

Pick an answer

1. Specific gravity has no bearing on how much liquid can be loaded
2. A denser liquid reaches the vehicle's maximum legal weight at a smaller volume than a lighter one
3. Weight limits are based only on the tank's physical volume, never the cargo's density, since volume is the only figure on the certification plate
4. All liquids weigh the same per gallon regardless of type

Correct!

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