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If securement is defective, the driver must stop and fix it immediately at the next safe location. Continuing risks accidents and is illegal. CDL training emphasizes constant responsibility for load security, not just at departure. Exams test this rule to confirm drivers know their legal duty during transit.

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Liquid surge in partially filled tanks creates unique braking challenges. When stopping, the liquid moves forward, exerting force that pushes the vehicle and increases stopping distance. Even with baffles, surge is only reduced—not eliminated. Drivers must brake smoothly, plan stops early, and maintain greater following distances. Partial loads can also cause “sloshing,” shifting weight side-to-side in turns. Axle overloads are not a direct result of partial loads but of improper loading. The idea of evaporation is incorrect. CDL tank-vehicle objectives emphasize anticipating surge effects, using controlled braking, and recognizing that surge can compromise stability. Safe braking techniques are crucial to prevent rollovers and collisions, making this a central exam topic.