Civil Engineering MCQAE Level Civil Engineering
Which of the following about filtration in water treatment is correct?
Environmental EngineeringRapid Sand FilterMEDIUM
Choose the correct answer
A
it is slower than all slow sand filters
B
it works only without sand
C
it requires backwashing after head loss builds up
D
it is never cleaned
Correct Answer
C. it requires backwashing after head loss builds up
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Rapid filters need periodic backwash. Correct option: C.
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