Which statement best describes the operating pressure of an MC-307/DOT 407 chemical hauler?

The statement that the MC-307/DOT 407 chemical hauler operates under moderate pressure up to 35 psi is accurate and reflects the typical operating conditions for this type of tanker. The MC-307/DOT 407 is designed to transport various liquids, including hazardous materials, and operates within a moderate pressure range that allows for safe transport while managing the integrity of the tank structure.

Operating at around 10 psi is considered low pressure, which does not fully represent the operational capabilities of these tankers. While low pressure is applicable to some types of tankers, the MC-307/DOT 407 is built to handle more than just low pressure environments.

Conversely, operating at extremely high pressures exceeding 100 psi would not be characteristic of this type of chemical hauler, as it is not designed for such conditions, which could increase the risk of failure or compromise the cargo. The use of vacuum pressure refers to a state where the internal pressure is below atmospheric pressure, which is not applicable to the MC-307/DOT 407, as it operates under positive pressure during transport.

Thus, the moderate pressure range accurately captures the operational setup of the MC-307/DOT 407, ensuring safety and efficiency in transporting liquids.