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Waste Water Engineering

Waste Water Engineering
In sewers the gas generally found, is

Hydrogen sulphide (H2S)
Methane (CH4)
Carbon dioxide (CO2)
All listed here

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Waste Water Engineering
Acid regression stage of sludge digestion at a temperature 21°C extends over a period of

60 days
90 days
30 days
15 days

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Waste Water Engineering
It is customary to design a sewer for D.W.F. on the basis of

Four times the average demand
Thrice the average demand
Twice the average demand
Average demand

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Waste Water Engineering
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is

25 cm
20 cm
50 cm
40 cm

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

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

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Waste Water Engineering
The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known

Branch sewer
Sewer outfall
Lateral sewer
House sewer

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MORE MCQ ON Waste Water Engineering

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