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Environmental Engineering

Environmental Engineering
As compared to geometrical increase method of forecasting population, arithmetical increase method gives

Lesser value
Accurate value
Same value
Higher value

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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
6 to 8
2 to 4

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Environmental Engineering
The characteristics of fresh and septic sewage respectively are

Both alkaline
Acidic and alkaline
Alkaline and acidic
Both acidic

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Environmental Engineering
The type of valve, which is provided on the suction pipe in a tube-well, is

Sluice valve
Reflux valve
Pressure relief valve
Air relief valve

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Environmental Engineering
The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by

COD > BOD > TOD
TOD > BOD > COD
TOD > COD > BOD
BOD > COD > TOD

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Environmental Engineering
The velocity of flow of water in a sedimentation tank is about

5 to 10 cm/sec
15 to 30 cm/minute
15 to 30 cm/sec
15 to 30 cm/hour

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MORE MCQ ON Environmental Engineering

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