Moderate
Fresh domestic sewage is _______________ in color?
Correct answer: A. Grey
- A. Grey
- B. Dark brown
- C. Red
- D. Black
Explanation
Fresh domestic sewage is usually grey or light grey because it has not yet undergone significant anaerobic decomposition. As sewage becomes septic and older, it generally changes to dark grey or black.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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