What test simulates stacking identical packages on top of each other for a period to assess leakage risk?

• A. Vibration test
• B. Pressure test
• C. Stacking test
• D. Drop test

Answer: (C)

Stacking test examines how well a package holds its contents when identical packages are stacked on top of it for a defined period, applying a load that mimics a real stack in transit. The aim is to reproduce the sustained pressure from above, which can push on closures and seams and reveal leakage paths if the contents are liquids. If there are other tests in mind, they focus on different hazards: vibration tests simulate movement and shaking, drop tests assess impact damage, and pressure tests check behavior under changing or external pressure rather than long-duration stacked load. That focus on sustained stack-induced stress makes stacking test the best fit for assessing leakage risk.