For Bingham Plastics and pseudo plastic liquids, the apparent viscosity:
For Bingham Plastics and pseudo plastic liquids, the apparent viscosity:
Select an option to attempt
Correct Answer: Option B
Explanation
Bingham plastic and pseudoplastic — viscosity behaviour:Non-Newtonian fluid classifications:• Pseudoplastic (shear-thinning): viscosity DECREASES with increasing shear rate. Examples: polymer solutions, many fermentation broths, blood.• Dilatant (shear-thickening): viscosity INCREASES with increasing shear rate. Examples: cornstarch slurry, some dense suspensions.• Bingham plastic: requires a yield stress before flow begins; then behaves as Newtonian (constant viscosity). Example: toothpaste, sludge.Common feature of Bingham plastic and pseudoplastic:• Both show a DECREASE in apparent viscosity with increasing applied force/shear rate (above yield stress for Bingham).This is the OPPOSITE of dilatant behaviour.Answer: Bingham plastics and pseudoplastics both show DECREASING apparent viscosity with increasing shear rate (shear-thinning behaviour).