Review Questions

  1. The term schmutzdecke refers to a layer that forms on the surface of the slow sand filter.
    1. True
    2. False
  2. The main parts of a slow sand filter include
    1. Filter box
    2. Filters media
    3. Underdrain
    4. All of the above
  3. Diatomaceous earth is composed of skeletons of microscopic plants.
    1. True
    2. False