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ENVIRONMENTAL ENGINEERING

Environmental Engineering
A sewer that receives the discharge of a number of house sewers is called

House sewer
Sub-main sewer
Intercepting sewer
Lateral sewer

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Environmental Engineering
The working conditions in imhoff tanks are

Aerobic in lower compartment and anaerobic in upper compartment
anaerobic in lower compartment and aerobic in upper compartment
Aerobic only
Anaerobic only

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Environmental Engineering
In chlorination, with the rise in temperature of water, death rate of bacteria

Increases
Decreases
Remains unaffected
None of these

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Environmental Engineering
Sewage treatment units are designed for

Maximum and minimum flow
Maximum flow only
Minimum flow only
Average flow only

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

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

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