35) The overflow rate for plain sedimentation tanks is about

500 to 750 litres/hour/ m2

1000 to 1250 litres/hour/ m2

1250 to 1500 litres/hour/m2

1500 to 2000 litres/hour/m2

Answer is:

500 to 750 litres/hour/ m2

Environmental Engineering MCQ with Answers

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36) Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about

10 to 25

100

Answer is:

75

37) The settling velocity of a particle in a sedimentation tank depends on

depth of tank

surface area of tank

both depth and surface area of tank

none of the above

Answer is:

surface area of tank

38) The settling velocity of a particle in a sedimentation tank increases if

particle size is decreased

the surface area of tank is increased

the depth of tank is decreased

none of the above

Answer is:

none of the above

39) For a given discharge, the efficiency of sedimentation tank can be increased by

increasing the depth of tank

decreasing the depth of tank

increasing the surface area of tank

decreasing the surface area of tank

Answer is:

increasing the surface area of tank

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35) The overflow rate for plain sedimentation tanks is about

500 to 750 litres/hour/ m2

Environmental Engineering MCQ with Answers

Related Environmental Engineering MCQ with Answers

36) Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about

75

37) The settling velocity of a particle in a sedimentation tank depends on

surface area of tank

38) The settling velocity of a particle in a sedimentation tank increases if

none of the above

39) For a given discharge, the efficiency of sedimentation tank can be increased by

increasing the surface area of tank

Environmental Engineering MCQ with Answers