Question 30General Subjects - 1st Asst/Chief70% to pass
If a reverse-osmosis freshwater generator has fouled membrane modules, what statement is true?
AI Explanation
The correct answer is C) The freshwater production rate would be lower than normal, and the feed pressure would be higher than normal.
When the reverse-osmosis membrane modules become fouled, the water permeability of the membrane decreases. This results in a lower freshwater production rate. At the same time, the feed pressure needs to be increased to maintain the desired freshwater output, as the fouled membrane creates more resistance to the water flow. This higher feed pressure is required to push the water through the less permeable membrane.
The other options are incorrect because they do not accurately describe the effects of membrane fouling on the freshwater production rate and feed pressure. Fouling would not increase the freshwater production rate or decrease the feed pressure.
Related Questions
#28 If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT _______________.#29 Under what conditions would the pre-treatment capabilities of a reverse osmosis fresh water generator MOST likely be overloaded, and as a result, these conditions should generally be avoided? #31 What is the BEST indication that the pre-treatment filter (or filters) of a reverse osmosis fresh water generator must be serviced by cleaning or replacement? #32 What is the BEST indication that the membrane module is damaged and is no longer semi-permeable and allowing the solute to pass through? #33 Item "M" shown in the illustration is the _______________. Illustration MO-0110