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ENVIRONMENTAL ENGINEERING

Environmental Engineering
The means of access for inspection and cleaning of sewer line is known as

Manhole
Catch basin
Drop manhole
Inlet

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Environmental Engineering
Orthotolidine test is used for determination of

Dose of coagulant
Residual chlorine
Dissolved oxygen
Biochemical oxygen demand

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Environmental Engineering
An egg shaped section of sewer

Is more stable than circular section
Provides self cleansing velocity at low discharges
Is economical than circular section
Is easy to construct

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

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

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Environmental Engineering
Most suitable section of sewer in separate sewage system is

Standard form of egg shaped sewer
Circular section
Rectangular section
Modified egg shaped section

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