The settling velocity of a particle in a sedimentation tank increases if
A. Particle size is decreased
B. The surface area of tank is increased
C. The depth of tank is decreased
D. None of the above
Answer: Option D
This Question Belongs to Civil Engineering >> Environmental Engineering
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# Rahul Kumar
in above question ask settling velocity increases not decreases than how option (d) is right answer.
Two types of settling vel occurs one theoretical and other actual
And also actual vel does not depend upon dimension of tank it depend upon dimension of particle
But theorical settling vel = Q / BL = Q / A = discharge / surface area of tank
Obiously Surface are increases set vel decreases hence option d correct
Why