Certified Pool Operator Practice Test

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Which type of filter system will remove the smallest micron particles?

  1. Cartridge filter

  2. Diatomaceous earth

  3. High rate sand

  4. Sump filter

The correct answer is: Cartridge filter

A cartridge filter is the most effective choice for removing smaller micron particles compared to the other options. Cartridge filters have a porous material that can capture particles as small as 10 microns, while diatomaceous earth can only filter particles between 2-5 microns and high rate sand filters can only filter particles between 20-40 microns. Sump filters, on the other hand, are typically used for mechanical filtration and may not be as effective in removing particles as a cartridge filter.

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