Question 90General Subjects - 1st Asst/Chief

The correct answer is B) The unit must be flushed with freshwater and treated with an anti-bacterial growth inhibitor. When a reverse-osmosis freshwater generator is shut down, it is important to flush the unit with freshwater to remove any remaining saltwater. This prevents the buildup of bacteria and scale that can occur when saltwater is left in the system. Treating the unit with an anti-bacterial growth inhibitor further helps to ensure that no harmful bacteria can develop during the shutdown period. The other options are incorrect because leaving the unit filled with saltwater (A) or flushing without using an anti-bacterial inhibitor (C) do not adequately prevent the growth of bacteria, which can damage the system. Treating the unit with an inhibitor without flushing (D) does not remove the existing saltwater, which can also lead to issues.