What is the typical internal working pressure of an MC-312/DOT 412 corrosives tanker?

The typical internal working pressure of an MC-312/DOT 412 corrosives tanker is indeed 15 to 25 psi. This range is essential for maintaining the structural integrity of the tanker while safely transporting various corrosive materials. MC-312/DOT 412 tankers are designed specifically for carrying hazardous substances that can be reactive and require careful handling under specific pressure conditions.

Operating within this pressure range helps to minimize the risk of leaks or ruptures, which is critical in preventing environmental contamination and ensuring the safety of first responders and the public during any incident involving these vehicles.

The lower pressures listed in the other choices do not match the operational requirements for these types of tankers, which need to maintain sufficient pressure to prevent vapor release and ensure the containment of the corrosive materials being transported.