Which of the following is an example of mechanical container failure?

The scenario involving a forklift puncture of a container exemplifies mechanical container failure because it describes a physical breach in the integrity of the container itself. Mechanical failure typically occurs due to external forces or physical damage, which directly compromises the ability of the container to safely contain its contents. In this case, the action of the forklift applying force results in puncturing the container, leading to potential leaks or spills of hazardous materials.

The other scenarios do not represent mechanical failures. Flammability of contents pertains to the chemical nature of the substances within the container rather than the container's physical structure. Corrosive interactions describe chemical reactions that occur between the contents and the container's material, which can lead to failure over time, but it is not classified as mechanical failure. Temperature changes due to environment might affect the container but do not involve a direct physical failure of the structure itself. Therefore, in this context, the emphasis on a specific physical breach caused by external impact clearly identifies the forklift puncture as the correct example of mechanical container failure.