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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

0.5
0.55
0.6
0.45

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Waste Water Engineering
The gas evolved in sewers is

All of these
Carbondioxide
Hydrogen sulphide
Methane

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Waste Water Engineering
The sewer that unloads the sewage at the point of treatment is called

Outfall sewer
House sewer
Branch sewer
Main sewer

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Waste Water Engineering
The first stage of neutral process of sludge digestion, is

Acid regression
Alkaline fermentation
Acid fermentation
None of these

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Waste Water Engineering
The sewerage system consists of

All of these
House sewer
Branch sewer
Lateral sewer

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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

Hydrogen sulphide
Methane
Carbon dioxide
Oxygen

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