Question

Pseudo-plastic is a fluid for which

• A. Dynamic viscosity decreases as the rate of shear increases
• B. Newton's law of viscosity holds good
• C. Dynamic viscosity increases as the rate of shear increases
• D. Dynamic viscosity increases with the time for which shearing forces are applied

Answer 1

Answer:

A. Dynamic viscosity decreases as the rate of shear increases

Pseudo-plastic fluids have a flow behavior index less than unity and their viscosity decreases as the shear rate (velocity gradient) increases.