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Environmental Engineering

Environmental Engineering
The biochemical treatment of sewage effluents is essentially a process of

Oxidation
Reduction
Dehydration
Alkalinization

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Environmental Engineering
If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is

4000
1,00,000
1000
4,00,000

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Environmental Engineering
The rate of BOD exerted at any time is

Directly proportional to BOD satisfied
Inversely proportional to BOD satisfied
Inversely proportional to BOD remaining
Directly proportional to BOD remaining

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

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

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Environmental Engineering
Which of the following is not a water borne disease?

Dysentery
Malaria
Typhoid
Cholera

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Environmental Engineering
The rate of filtration in slow sand filters in million litres per day per hectare is about

50 to 60
500 to 600
100 to 150
1400 to 1500

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