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Environmental Engineering

Environmental Engineering
The pathogens can be killed by

Chlorination
Nitrification
None of these
Oxidation

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Environmental Engineering
The self cleansing velocity for all sewers in India is usually

Less than 1.0 m/sec
3.0 m/sec to 3.5 m/sec
1.0 m/sec to 1.2 m/sec
1.5 m/sec to 2.0 m/sec

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Environmental Engineering
Which of the following methods of analysis of water distribution system is most suitable for long and narrow pipe system?

Circle method
Hardy cross method
Electrical analysis method
Equivalent pipe method

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Environmental Engineering
Standard EDTA (ethylene diamine tetra acetic acid) solution is used to determine the

Turbidity in water
Dissolved oxygen in water
Residual chlorine in water
Hardness in water

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Environmental Engineering
The specific gravity of sewage is

Much greater than 1
Slightly less than 1
Equal to 1
Slightly greater than 1

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Environmental Engineering
The detention period for oxidation ponds is usually kept as

3 months
48 hours
10 to 15 days
24 hours

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