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Environmental Engineering

Environmental Engineering
Residual chlorine in water is determined by

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

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Environmental Engineering
Air binding phenomena in rapid sand filters occur due to

Excessive negative head
Mud ball formation
Low temperature
Higher turbidity in the effluent

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

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

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Environmental Engineering
The ratio of 5 day BOD to ultimate BOD is about

43864
43833
1
43894

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Environmental Engineering
Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)

y = N + R
N = y + R
R = N + y
R > (N + y)

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Environmental Engineering
The design discharge for the separate sewer system shall be taken as

Equal to dry weather flow (DWF)
2 × DWF
6 × DWF
3 × DWF

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