Allied & ICAR Exam Bank • ALLIED_0749NAT • 2 Marks
Section 7: Dairy and Food Engineering
Dairy Unit Operations
Subtopic: Dairy Unit Operations
Question Statement:
According to Stokes' law in a centrifugal field, terminal radial migration velocity of a fat globule is $v = \frac{d^2 (\rho_s - \rho_f) r \omega^2}{18 \mu}$. If fat globule diameter $d$ is doubled (factor of 2), migration velocity increases by a factor of $2^2$, which equals:
Answer Key:
4
Step-by-Step Solution & Explanation
Velocity scales as $d^2$, so doubling diameter increases velocity by $2^2 = 4.0$.