Which of the following can lead to flooding out the plant in a recirculated system?

In a recirculated system, all of the listed factors can contribute to flooding the plant, making the correct choice comprehensive and pertinent to the operational integrity of such systems.

Over-adjusting metering valves can disrupt the balance of refrigerant flow within the system. These valves are designed to control the rate at which refrigerant is introduced into the evaporator. If they are set too high or low, it can lead to either excessive flooding of the evaporator or insufficient refrigerant flow, both of which impact the system's efficiency and can lead to operational failures.

Mismanaged liquid delivery when compressors turn off also plays a crucial role in maintaining proper system function. When a compressor stops, there can be a surge of liquid refrigerant that is not adequately vaporized. This can flood the evaporator, leading to liquid carryover into the compressor, causing potential damage or failure.

Thermostats set below the Supply Air Temperature (SAT) can create conditions where the system attempts to cool beyond its capacity. This excessive cooling can result in more liquid refrigerant being present than the system can handle, which can again lead to flooding.

Given that each of these factors can potentially contribute to flooding in a recirculated system, the selection stating that all of these can