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Environmental Engineering

Environmental Engineering
When there is no recirculation of sewage, then recirculation factor is

None of these
1
Infinity

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Environmental Engineering
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as

8.5 to 10.0
4.5 to 6.0
6.5 to 8.0
10.5 to 12.0

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

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

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Environmental Engineering
On standard silica scale, the turbidity in drinking water should be limited to

50 ppm
20 ppm
30 ppm
10 ppm

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Environmental Engineering
The minimum and maximum diameters of sewers shall preferably be

15 cm and 300 cm
30 cm and 450 cm
15 cm and 100 cm
60 cm and 300 cm

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Environmental Engineering
Sewerage system is designed for

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

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