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Waste Water Engineering

Waste Water Engineering
The sludge does not contain waste water from

Wash basins
Kitchen sinks
Bath rooms
Toilets

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Waste Water Engineering
In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept

2
0.25
10
5

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Waste Water Engineering
A well oxidized sewage contains nitrogen mainly as

Nitrates
Free ammonia
None of these
Nitrites

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Waste Water Engineering
In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

All of these
100 mm dia
225 mm dia
150 mm dia

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Waste Water Engineering
Depletion of ozone layer in the outer atmosphere may cause

Lung cancer
Skin cancer
Bronchitis
Heart disorder

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Waste Water Engineering
For efficient working of a sewer, it must be ensured that

Both (A) and (B)
Neither (A) nor (B)
Minimum velocity of 0.45 m/sec, is maintained at its minimum flow
A maximum velocity of 0.90 m/sec, is maintained at its maximum flow

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