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Waste Water Engineering

Waste Water Engineering
Which one of the following part of human body withstands minimum radiation?

Ovaries/testis
Eyes
Kidneys
Thyroid

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Waste Water Engineering
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is

1 in 60
1 in 120
None of these
1 in 100

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Waste Water Engineering
In trickling filter, B.O.D. is reduced to

40 to 60%
80 to 90%
30 to 40%
60 to 80%

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Waste Water Engineering
For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is

10 cm
18 cm
15 cm
12 cm

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Waste Water Engineering
Ventilating shafts are provided to a sewer line at every

100 m
300 m
200 m
150 m

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Waste Water Engineering
Dry weather flow is:

Average monthly rate of flow
Average daily rate of flow
Average annual rate of flow
Water supply allowance per capita

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