Question Bank • QB_DFE_EXP_014 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Heat and Mass Transfer

Subtopic: Diffusive and convective mass transfer

Question Statement:

In mass transfer, the dimensionless Schmidt number ($Sc$) is defined as the ratio of:

Options:

  • (A) Kinematic viscosity (momentum diffusivity) to mass diffusivity ($Sc = \nu / D_{AB}$)
  • (B) Thermal diffusivity to mass diffusivity
  • (C) Buoyancy force to viscous force
  • (D) Inertial force to surface tension force

Answer Key:

A

Step-by-Step Solution & Explanation

Schmidt number represents the relative rate of momentum transport to mass transport: $Sc = \frac{\mu}{\rho D_{AB}} = \frac{\nu}{D_{AB}}$
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