What might be an indicator of problems with a chlorine system if gas is emitted instead of liquid?

The correct answer indicates that a broken eductor tube could lead to the issue of gas being emitted instead of the expected liquid. The eductor tube plays a crucial role in the operation of a chlorine gas system, as it is responsible for mixing chlorine gas with water to create a solution suitable for disinfection. If the eductor tube is damaged or broken, it can disrupt this mixing process, preventing the proper formation of the chlorine solution. As a result, instead of liquid chlorine being delivered to the application point, gas may be emitted, which can pose safety risks and indicate malfunctioning equipment.

In contrast, clogged valves might impede flow but would not necessarily cause gas to be emitted. A failure in the metering pump represents another potential malfunction but typically would result in reduced or no flow rather than an emission of gas. Lastly, excess liquid buildup would suggest that liquid is being appropriately delivered to the system, not that gas is being emitted instead of liquid. Therefore, a broken eductor is distinctly associated with the specific issue described in the question.