Question

The lower limit of particle size allowed in sedimentation analysis is ________

(a) 0.0002 mm

(b) 0.04 mm

(c) 0.074 mm

(d) 0.0004 mm

The question was asked in exam.

Origin of the question is Sedimentation Analysis topic in chapter Index Properties Determination of Geotechnical Engineering I

Answer 1

The correct answer is (a) 0.0002 mm

To explain I would say: The particle smaller than 0.0002 mm is affected by Brownian movement and stokes law remains no longer valid.