The following diagram illustrates the operation of a rapid sand filter. Washwater storage tank Water level while filtering E A From coagulation larification bas Sand + Gravel OOO OO Filter rate controller B CO D Water level while washing H B Scai Bottom of washwater trough Washwater rate controller E Lateral drain Filtered water Main drain storage tank Washwater drain The Valve D is to O 1) Control influent water from sedimentation tanks O2) Discharge dirty backwash water 3) Discard the initial filtered water after backwashing and resuming filtration 4) Control the clean backwash water 5) None of the above
The following diagram illustrates the operation of a rapid sand filter. Washwater storage tank Water level while filtering E A From coagulation larification bas Sand + Gravel OOO OO Filter rate controller B CO D Water level while washing H B Scai Bottom of washwater trough Washwater rate controller E Lateral drain Filtered water Main drain storage tank Washwater drain The Valve D is to O 1) Control influent water from sedimentation tanks O2) Discharge dirty backwash water 3) Discard the initial filtered water after backwashing and resuming filtration 4) Control the clean backwash water 5) None of the above
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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