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Environmental Engineering

Environmental Engineering
The pathogens can be killed by

Chlorination
Nitrification
Oxidation
None of these

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Environmental Engineering
Disinfection efficiency is

Increased at higher pH value of water
Highest at pH value equal to 7
Unaffected by pH value of water
Reduced at higher pH value of water

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Environmental Engineering
The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is

Circle method
Hardy cross method
Equivalent pipe method
Electrical analysis method

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Environmental Engineering
Standard BOD is measured at

30°C - 5 day
25°C - 3 day
20°C - 1 day
20°C - 5 day

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Environmental Engineering
Orthotolidine test is used for determination of

Dissolved oxygen
Biochemical oxygen demand
Dose of coagulant
Residual chlorine

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Environmental Engineering
The suitable system of sanitation for area of distributed rainfall throughout the year with less intensity is

Separate system
Partially combined system
Combined system
Partially separate system

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