What is an "explosion vent"?

An explosion vent is specifically designed to relieve pressure during an explosion, making option B the correct choice. In the context of industrial processes, when an explosion occurs, it generates a rapid buildup of pressure that can lead to catastrophic equipment failure. Explosion vents are strategically installed to allow the excess pressure to escape, minimizing damage to equipment and reducing the risks to personnel and surrounding areas.

These vents are often constructed from materials that can be easily breached, ensuring that when the pressure exceeds a certain threshold, the vent will open and efficiently release the energy created by the explosion. This controlled release is essential for maintaining safety in environments where volatile substances are handled, as it directs the force of the explosion away from critical infrastructure and personnel.

The other options related to lighting materials, storing chemicals, and personal protective equipment do not align with the function of an explosion vent, which is specifically focused on pressure relief and safety during rapid pressure changes caused by explosions.