List of top Food Engineering and Technology Questions on Fluid Mechanics

Consider the following statements related to Newtonian fluids:
A. Shear stress is proportional to shear rate
B. Viscosity remains constant at a given temperature
C. Milk behaves as a perfect Newtonian fluid
D. Apparent viscosity changes with shear rate indicates Newtonian fluid
E. Water is a Newtonian fluid
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Among the following steps in the correct sequence for determining the flow regime and pressure drop of Newtonian fluids flowing through a pipe:
A. Calculate the Reynolds number to classify flow as laminar or turbulent
B. Use the Hagen–Poiseuille equation for laminar flow or friction factor charts for turbulent flow to find pressure drop
C. Measure or estimate fluid properties (density, viscosity), pipe diameter, and average velocity
D. Determine flow rate from velocity and cross-sectional area, relating to pressure drop via momentum balance
E. Identify critical Reynolds number transitions (Re $<$ 2100 laminar, Re $>$ 4000 turbulent)
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The Reynolds number is used to characterize the type of fluid flow.
Reason (R): It represents the ratio of inertial forces to viscous forces.
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