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

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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

40) The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally

less and more

less and less

more and less

more and more

Answer is:

more and less

41) The amount of coagulant needed for coagulation of water increases with i)increase in turbidity of water ii)decrease in turbidity of water iii)increase in temperature of water iv)decrease in temperature of water The correct answer is

(i) and (ii)

(i)and(iv)

(ii) and (iii)

(ii) and (iv)

Answer is:

(i)and(iv)

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

surface area of tank

Environmental Engineering MCQ with Answers

Related Environmental Engineering MCQ with Answers

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

40) The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally

more and less

41) The amount of coagulant needed for coagulation of water increases with i)increase in turbidity of water ii)decrease in turbidity of water iii)increase in temperature of water iv)decrease in temperature of water The correct answer is

(i)and(iv)

Environmental Engineering MCQ with Answers