Settling velocity increases with

Settling velocity depends mainly on particle size, specific gravity, and liquid properties (such as viscosity/temperature). It does not depend on the depth of the settling tank.

✅ Correct answer: B) Size of particles

Why?

Settling velocity is strongly dependent on particle size. For small particles under Stokes' law:

[
V_s propto d^2
]

where (d) = particle diameter.

So, larger particles settle faster → higher settling velocity.

A) Specific gravity → also affects settling velocity, but in this MCQ the standard answer is particle size.

B) Size of particles → ✅ Correct

C) Depth of tank → does not directly determine settling velocity.

D) Temperature → affects viscosity and therefore can affect settling, but it is not the primary factor here.


👉 Answer: B) Size of particles

Option A,B and D are correct, pls change the question. Settling velocity does not increases with depth of the tank.

I think question is like this:settling velocity does not increase with...

There is no relation with depth, wrong answer

Size of particles pe depend kregi I think

Wrong answer

Settling velocity is directly proportional to diameter of the particle & Sp Gravity of the particle...There is no relation with the depth ..So plz correct the ans...

B should be the answer, please correction the answer

A,B and D..
All ans is correct except C..

Vs=(G-1)YD²/18ú
Ans will be size of particle

Settling velocity has no relation with the depth,, but is directly related with specific area of the tank

Except c all 3 are hold good for the question

Option a & b holds good for this question actually

B