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Waste Water Engineering

Waste Water Engineering
The asbestos cement pipes are generally laid

Vertically
At an angle of 30°
At an angle of 60°
Horizontally

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Waste Water Engineering
The formula V = (1/n) r2/3

Kutter’s formula
Bazin’s formula
Manning’s formula
Chezy’s formula

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Waste Water Engineering
For providing an Indian type W.C., the R.C.C. slabs in the toilet portion

Should be sunk by 20 cm
Should be kept 20 cm above the adjacent portion
Should be sunk by 50 cm
Need not be sunk

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Waste Water Engineering
Fresh sewage is generally

Alkaline
Acidic
A source of objectionable odour
Highly decomposed

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Waste Water Engineering
For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is

15 cm
18 cm
12 cm
10 cm

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Waste Water Engineering
Aerobic bacterias

Oxidise organic matter in sewage
Flourish in the presence of free oxygen
All of these
Consume organic matter as their food

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