Reverse osmosis units also have cartridge filters installed immediately ahead of the RO unit to remove suspended matter down to _____.

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Multiple Choice

Reverse osmosis units also have cartridge filters installed immediately ahead of the RO unit to remove suspended matter down to _____.

Explanation:
Before the water reaches the RO membrane, a cartridge sediment filter acts as a prefilter to remove suspended solids that could clog or foul the membrane. The goal is to reduce particulates to a very fine size—around 5 to 10 microns—so the membrane stays clean and flow remains adequate. Coarser options would leave too many solids and increase fouling, while a finer micron rating provides effective protection with an acceptable pressure drop. That’s why the correct choice reflects a fine micron-range filtration.

Before the water reaches the RO membrane, a cartridge sediment filter acts as a prefilter to remove suspended solids that could clog or foul the membrane. The goal is to reduce particulates to a very fine size—around 5 to 10 microns—so the membrane stays clean and flow remains adequate. Coarser options would leave too many solids and increase fouling, while a finer micron rating provides effective protection with an acceptable pressure drop. That’s why the correct choice reflects a fine micron-range filtration.

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