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Civil Engineering - Waste Water Engineering

Exercise : Waste Water Engineering - Section 6
26.
Pick up the correct statement from the following :
Small sewers are cleaned by flushing
Medium sewers are cleaned by cane rodding
Medium sewers may be cleaned by pills
Large sewers are cleaned by removing the deposited materials
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Cement concrete sewers are only suitable if non-scouring velocity is between
2.5 to 3.0 m/sec
3.0 to 4.0 m/sec
3.5 to 4.5 m/sec
4.5 to 5.5 m/sec.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The grit chambers of sewage treatment plants, are generally cleaned after
2 days
5 days
7 days
12 days
14 days.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The spacing of bars for perforations in coarse screens used for the treatment of sewage, is
20 mm
30 mm
40 mm
50 mm
100 mm.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
In very first stage of decomposition of the organic matter in sewage
nitrites are formed
nitrates are formed
carbondioxide is formed
ammonia is formed.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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