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Environmental Engineering

Environmental Engineering
Residual chlorine in water is determined by

Both (A) and (B)
Orthotolidine method
Starch iodide method
None of these

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Environmental Engineering
Generally the detention period for grit chambers is kept as

5 minutes
1 minute
24 hours
12 hours

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

Anti-siphonage pipe
Vent pipe
Waste pipe
Soil pipe

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Environmental Engineering
The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of

100 mg/liter
1000 mg/liter
10 mg/liter
1 mg/liter

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Environmental Engineering
Composting and lagooning are the methods of

Sludge digestion
Filtration
Sedimentation
Sludge disposal

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Environmental Engineering
Sewage treatment units are normally designed for

15 - 20 years
28 - 30 years
15 - 28 years
5 - 10 years

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