Question

Statement 1: NPr= (Cp μ)/k

Statement 2: If NPr is lesser than 1, Thermal Boundary layer is thinner than Hydrodynamic Boundary layer.

(a) True, False

(b) True, True

(c) False, False

(d) False, True

The question was posed to me during a job interview.

My doubt is from Unit Operations topic in chapter Heat Transfer by Conduction, Convection and Radiation of Food Engineering

Answer 1

Correct choice is (a) True, False

Easiest explanation: NPr= (Cp μ)/k. Thermal Boundary layer is thicker than Hydrodynamic Boundary layer.