Civil Engineering - Waste Water Engineering

16.
Drop manholes at the junctions of sewer lines, are provided if
invert level of a branch sewer is more than 60 cm that of the main sewer
sewer line runs along a main road
ordinary manhole cannot be built
two sewer lines intersect.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
The most effective arrangement for diverting excess storm water into a natural drainage, is
leaping weir
overflow weir
siphon spill way
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

18.
Large diameter sewers subjected to external pressure alone, are reinforced
near the inner surface of the pipe
near the outer surface of the pipe
both (a) and (b)
with elliptical cage
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
Pick up the correct statement from the following :
The ratio of the quantity of the diluting water to that of the sewage, is known as dilution factor
The automatic purification of polluted water, is known self purification phenomenon
The photosynthesis is carried out in the presence of sun light
Grab sample is generally obtained from the surface where turbulence mixes the sewage particles
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

20.
In sewage, the solids in mg per litre is
100 to 500
500 to 1000
1000 to 1500
1500 to 2000
Answer: Option
Explanation:
No answer description is available. Let's discuss.