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Civil Engineering - Waste Water Engineering

Exercise : Waste Water Engineering - Section 1
1.
The minimum recommended diameter of sewers, is
5 cm
10 cm
15 cm
20 cm.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Aerobic bacterias
flourish in the presence of free oxygen
consume organic matter as their food
oxidise organic matter in sewage
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The rate of accumulation of sludge in septic tanks is recommended as
30 litres/person/year
25 litres/person/year
30 litres/person/month
25 litres/person/month.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
200 ppm
225 ppm
250 ppm
None of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
If D is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is
D
1.25 D
1.5 D
1.75 D
2 D.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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