1. The effluent of a septic tank is
2. 5 days-biochemical oxygen demand (BOD5) is taken at a temperature of
3. The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope
4. Drop manholes are the manholes
5. For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of
6. The rainfall at any place may be determined by
7. The clarigesters are
8. If the grit in grit chambers is 4.5 million litres per day, its cleaning is done
9. In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept
10. A manhole is classified as shallow if its depth is between
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