Why should a tank vehicle driver use gentler acceleration and braking than they might in a dry van of similar weight?

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1. It reduces the surge of liquid inside the tank that can otherwise upset the vehicle's balance
2. Dry vans and tank vehicles require identical driving techniques
3. Gentle acceleration and braking have no relationship to liquid movement inside the tank, since the tank shell absorbs any internal shift
4. It is only relevant when the tank is completely full

Correct!

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