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Waste Water Engineering

Waste Water Engineering
hydraulically equivalent, the relationship which holds good, is

D3/2 = 4 b3/2
D8/3 = 4 b8/3
D3/8 = 4 b3/8
D2/3 = 4 b2/3

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Waste Water Engineering
If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains

Carbon dioxide
Methane
Hydrogen sulphide
Oxygen

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Waste Water Engineering
The effluent of a septic tank is

Foul and contains dissolved and suspended solids
Fit for discharge into any open drain
As good as that from a complete treatment
None of these

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Waste Water Engineering
The most efficient cross-section of sewers in a combined sewerage system is

Parabolic
New egged
Rectangular
Circular

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Waste Water Engineering
Pathogens (or pathogenic bacterias) in water may cause

All listed here
Cholera
Dysentery
Typhoid

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Waste Water Engineering
Water content of sewage is about

0.99
0.999
0.95
0.9

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