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Civil Engineering - Waste Water Engineering

Exercise : Waste Water Engineering - Section 2
21.
To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is
0.50 m/sec
0.60 m/sec
0.70 m/sec
0.75 m/sec
1.0 m/sec.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Pick up the correct statement from the following :
Turbidity is more in strong sewage
The black colour indicates septic sewage
The fresh sewage is practically odourless
The sewage omits offensive odours after four hours
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
In sewers the gas generally found, is
Hydrogen sulphide (H2S)
Carbon dioxide (CO2)
Methane (CH4)
Petrol vapours
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
A sewer running partially full and hurried with back filled, fails in compression due to
weight of the pipe
weight of the back fill
superimposed traffic loads
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
A manhole is classified as shallow if its depth is between
0.4 to 0.5 m
0.5 to 0.7 m
0.7 to 0.9 m
0.9 to 1.20 m
1.2 to 1.50 m.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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