There is no real need to open hollow drums, vessels, or containers prior to working on them. Is this statement accurate?

• A. Yes, it is necessary to open and vent them
• B. No, there is no real need to open them
• C. Only if the container is empty
• D. Only for vessels made of metal

Answer: (B)

When you’re about to work on hollow drums, vessels, or containers, the key safety idea is that these spaces can trap hazardous vapors, gases, or even pressure. You can’t assume they’re safe just because they look empty. Opening and venting or purging the interior helps ensure there isn’t an explosive or toxic atmosphere, and it releases any built-up pressure that could worsen a cut, weld, or other operation.

Even if a container appears empty, residues or vapors may remain, and heat from welding or grinding can trigger them. By opening, venting, and, if needed, purging with air or an inert gas, you reduce the risk of fire, explosion, or inhalation hazards. The material of the vessel (metal vs. non-metal) doesn’t remove this risk; all hollow spaces can hold hazardous atmospheres.

So the statement isn’t accurate. Prior to working on such containers, they should be opened and vented or purged to ensure a safe interior atmosphere.