A container exhibiting bulging is a sign that contents under pressure may what?

• A. Explode
• B. Leak slowly
• C. Corrode
• D. Spill out

Answer: (A)

Bulging shows the container is under high internal pressure, with the walls stretched from the force of the gas or liquid inside. When pressure keeps rising, the container can fail catastrophically, leading to a rupture or an explosion. That immediate danger—an explosive release of contents—is why bulging is a sign to treat the contents as potentially explosive rather than simply leaking or reacting slowly.

A slow leak implies a breach that allows content to escape gradually, which is not the same as the rapid, violent failure suggested by bulging. Corrosion concerns the material wearing away over time, not the pressure buildup that causes bulging. Spilling out can occur if a container breaks, but the distinctive hazard signaled by bulging is the potential for an explosion due to overpressure. If you see a bulging container, it should be set aside and handled according to safety protocols.