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GATE CE 2017 Set 1 — Question 53

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NAT+2 / -0MediumScreening & Grit RemovalWastewater Treatment ProcessesEnvironmental EngineeringTerminal VelocityForces on Immersed BodiesWater Resources Engineering

Environmental Engineering → Forces on Immersed Bodies → Screening & Grit Removal

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Question

The spherical grit particles, having a radius of 0.01 mm0.01\text{ mm} and specific gravity of 3.03.0, need to be separated in a settling chamber. It is given that
  • g=9.81 m/s2g = 9.81\text{ m/s}^2
  • the density of the liquid in the settling chamber =1000 kg/m3= 1000\text{ kg/m}^3
  • the kinematic viscosity of the liquid in the settling chamber =10−6 m2/s= 10^{-6}\text{ m}^2/\text{s}
Assuming laminar conditions, the settling velocity (in mm/s, up to one decimal place) is ___________
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