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Civil Engineering - Waste Water Engineering

Exercise : Waste Water Engineering - Section 3
26.
The rainfall at any place may be determined by
its intensity
its direction
its frequency
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
In trickling filter, B.O.D. is reduced to
30 to 40%
40 to 60%
60 to 80%
80 to 90%
95%.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Which one of the following gases is most significant as air pollutant
Carbondioxide
Oxygen
Nitrogen
Sulphurdioxide.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Which one of the following statements regarding septic tanks is wrong :
a gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided
the outlet invert level is kept 5 to 7.5 cm below the inlet invert level
the minimum width of septic level is 90 cm
the depth of tank is kept equal to its width.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,
is only provided
is doubled
is trebled
is not enough.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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