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Environmental Engineering

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

Inlet
Manhole
Catch basin
Drop manhole

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Environmental Engineering
The percentage of chlorine in fresh bleaching powder is about

30 to 35
40 to 50
20 to 25
10 to 15

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Environmental Engineering
The detention period in coagulation tanks is usually kept as

2 to 6 days
2 to 6 hours
30 to 45 minutes
1 to 2 minutes

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Environmental Engineering
The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is

4 ppm
1 ppm
10 ppm
40 ppm

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Environmental Engineering
Alum as a coagulant is found to be most effective when pH range of water is

8 to 10
4 to 6
2 to 4
6 to 8

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Environmental Engineering
The layout of distribution system in which water flows towards the outer periphery is

Grid iron system
Ring system
Radial system
Dead end system

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MORE MCQ ON Environmental Engineering

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