What must be present to prevent the release of gases during dispensing?

The correct answer highlights the importance of having a containment device or system specifically designed to prevent the release of gases during dispensing. This is critical in ensuring safety in environments where non-flammable medical gases are used, such as hospitals and medical facilities. A containment system can be designed to capture any unintended gas releases, ensuring that personnel are safe and that the environment remains uncontaminated.

Containment systems may include features like containment bags, pressure regulation devices, or specialized piping systems that are engineered to handle specific types of gases safely. By having such a design in place, it acts as a proactive measure to mitigate risks associated with gas dispensing processes, thereby safeguarding both workers and patients.

Other options, although potentially useful in different contexts, do not specifically address the need to contain gases during dispensing. For example, a manual override system might be useful for operational control, but it does not prevent gas release. Similarly, while a cooling system could play a role in temperature control for certain gas applications, it is not directly related to preventing gas dispersion. An operator’s license is important for legal compliance and operational understanding but does not have a physical bearing on gas containment. Therefore, a containment device or system is the essential element needed to prevent gas release effectively.