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Waste Water Engineering

Waste Water Engineering
Flocculated particles do not change their

Shape
Size
Weight
None of these

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

B = 0.5 d
d = 0.5 B
d = 0.2 B
B = 0.2 d

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Waste Water Engineering
If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is

D’ = 0.84 D
D’ = 0.64 D
D’ = 0.94 D
D’ = 0.74 D

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Waste Water Engineering
For detecting the nitrites in the sewage, the matching colour may be developed by adding

Phenol-di -sulphuric acid potassium hydroxide
Potassium permanganate
Sulphuric acid and napthamine
None of these

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Waste Water Engineering
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

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Waste Water Engineering
The average temperature of sewage in India, is

20°C
10°C
15°C
25°C

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