A tank truck is 80% full of a low-viscosity liquid. The driver begins a gradual braking maneuver on a level road. Which outcome best describes what happens to vehicle handling?
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AThe moving liquid creates a forward surge force that supplements braking
BThe moving liquid creates a forward surge force that adds to stopping distance
CThe high fill level prevents the liquid from moving, eliminating surge
DThe vehicle will be unaffected because the tank is nearly full
✓ Correct answer: B. The moving liquid creates a forward surge force that adds to stopping distanceEven at high fill levels there is enough free space for liquid to surge; the forward momentum of the liquid pushes against the direction of braking and extends stopping distance, as the CDL manual warns.
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