Question

Which of the following statements about the basic principle of sedimentation is False?

(a) The denser a biological structure is, the faster it sediments in a centrifugal field

(b) The more massive a biological particle is, the slower it moves in a centrifugal field

(c) The denser the buffer system is, the slower the particle will move in a centrifugal field

(d) The greater the centrifugal force is, the faster the particle sediments

The question was asked in exam.

Query is from Centrifugal Seperators in section Building Blocks of Dairy Processing of Dairy Engineering

Answer 1

Right choice is (b) The more massive a biological particle is, the slower it moves in a centrifugal field

To explain: Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained, and come to rest against a barrier. The statement is false because the more massive a biological particle is, the faster it moves in a centrifugal field.