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Waste Water Engineering

Waste Water Engineering
To maintain aerobic biological activity, the moisture content of the compost mass should be about

0.55
0.6
0.45
0.5

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Waste Water Engineering
Clogging of sewers, is caused due to

All of these
Low discharge
Silting
Greasy and oily matters

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Waste Water Engineering
In sewage, the solids in mg per litre is

1000 to 1500
100 to 500
1500 to 2000
500 to 1000

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Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

3.0 m
4.0 m
2.0 m
1.0 m

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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

Methane
Carbon dioxide
Hydrogen sulphide
Oxygen

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

Circular
Parabolic
New egged
Rectangular

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