The function of skimming tank in sewage treatment is to remove _____________ substances?
Correct answer: C. Oil & fatty
- A. Dissolved solid
- B. Suspended solid
- C. Oil & fatty
- D. Gritty & inorganic
Explanation
A skimming tank removes floating substances such as oil, grease and fats by allowing them to rise to the surface for collection. Grit and inorganic particles are removed in a grit chamber, not a skimming tank.
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