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Environmental Engineering

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

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

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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
500 to 600
100 to 150
50 to 60

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Environmental Engineering
Standard BOD is measured at

30°C - 5 day
25°C - 3 day
20°C - 5 day
20°C - 1 day

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Environmental Engineering
The effect of increasing diameter of sewer on the self cleansing velocity is

Nil
To decrease it
Fluctuating
To increase it

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Environmental Engineering
The process of lagooning is primarily a means of

Increasing the capacity of storage reservoirs
Disposing of sludge
Reducing the excessive flow in sewers
Increasing flow of sewage through imhoff tanks

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Environmental Engineering
The phenolic compounds in public water supply should not be more than

0.1 ppm
0.01 ppm
0.001 ppm
0.0001 ppm

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MORE MCQ ON Environmental Engineering

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