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Waste Water Engineering

Waste Water Engineering
R.M.O. expenses include

Operation expenses
Running expenses
Maintenance expenses
All of these

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Waste Water Engineering
The porosity of sediments in sewer pipes, is usually taken as

0.012
0.011
0.01
0.013

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Waste Water Engineering
For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of

HCl
None of these
HNO₃
H₂SO₄

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

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

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Waste Water Engineering
The gas which may cause explosion in sewers, is

Carbondioxide
Ammonia
Carbon monoxide
Methane

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Waste Water Engineering
pH value of sludge during alkaline regression stage, is

More than 7
More than 6
Less than 6
Less than 7

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