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Waste Water Engineering

Waste Water Engineering
The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be

1.2 m
> 1.5 m
1.5 m
0.9 cm

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Waste Water Engineering
Fresh sewage is generally

Alkaline
Highly decomposed
Acidic
A source of objectionable odour

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

0.6
0.45
0.5
0.55

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

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

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

Main sewer
Branch sewer
House sewer
Outfall sewer

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Waste Water Engineering
A manhole is generally provided at each

Change of gradient
Junction
Bend
All of these

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