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Environmental Engineering

Environmental Engineering
The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called

Anti-siphonage pipe
Waste pipe
Vent pipe
Soil pipe

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Environmental Engineering
Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about

50
100
59
75

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Environmental Engineering
The gas from sludge digestion tank is mainly composed of

Methane
Hydrogen sulphide
Nitrogen
Carbon dioxide

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Environmental Engineering
Composting and lagooning are the methods of

Sedimentation
Sludge digestion
Filtration
Sludge disposal

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Environmental Engineering
The detention period in coagulation tanks is usually kept as

2 to 6 hours
2 to 6 days
30 to 45 minutes
1 to 2 minutes

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Environmental Engineering
If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test

Only (i)
All (i), (ii) and (iii)
Both (i) and (iii)
Both (i) and (ii)

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