Moderate
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called___________________?
Correct answer: D. Septic tank
- A. Cesspool
- B. Lagoon
- C. Skimming mill
- D. Septic tank
Explanation
A septic tank is an underground masonry or concrete chamber in which sewage undergoes anaerobic decomposition. A cesspool mainly stores sewage, whereas a lagoon is a larger treatment pond.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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