If the specific gravity of a settleable particles is increased from 2 to 3, the settling velocity will

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WBPSC JE Civil 2016 Official Paper
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  1. get doubled
  2. increased by 1.50 times
  3. increased by 2.60 times
  4. increased by 2.25 times

Answer (Detailed Solution Below)

Option 1 : get doubled
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Detailed Solution

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VExplanation:

Settling velocity for discrete particles,

Where

S = sp. gravity of the particle

d = diameter of the particle

ν = kinematic viscosity

Calculation:

Case-1

S = 2

Case-2

S = 3

So, an increase in settling velocity is

Vs2 = 2 × Vs1

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