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Civil Engineering - Waste Water Engineering

Exercise : Waste Water Engineering - Section 4
46.
Pick up the incorrect statement from the following :
The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion
Sludge digestion is carried out in sludge tank
The gases produced in sludge digestion process, contain 75% carbon dioxide
The gases produced in sludge digestion process, contain 75% methane.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Pick up the correct statement from the following :
The circular section of sewers provides maximum hydraulic mean depth
The circular sewers are provided for separate sewerage system
The circular sewers work efficiently if the sections run at least half full
Two sewers of different shapes are said to be hydraulically equivalent if they discharge at the same rate while running full on the same grade
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at
full depth
half full
two third full
three fourth full.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
The ratio of depths at partial flow with central angle α and at full flow of a sewer, is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed
1.5
2.0
2.5
3.0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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