Which of the following is true about non-Newtonian fluids?

• Their viscosity is independent of the applied force

• Their viscosity changes depending on the shear rate

• They behave as Newtonian fluids under all conditions

• Their viscosity remains constant at all shear rates

What does "shear strain" refer to in rheology?

• The force per unit area exerted on a material

• The rate of deformation of the material

• The displacement divided by the gap

• The time it takes for a material to return to its original shape

What is the primary difference between "shear stress" and "shear rate"?

• Shear stress is a function of time, while shear rate is constant

• Shear stress refers to the force applied to a fluid, and shear rate refers to the rate of deformation

• Shear stress affects only solids, while shear rate affects only liquids

• Shear rate is independent of force, while shear stress is dependent on force

Which of the following is NOT a characteristic of plastic fluids?

• They exhibit shear thinning behavior

• They have a yield stress

• They behave like solids under low stress

• They are non-Newtonian fluids

Which type of measuring system is best suited for testing low viscosity materials?

• Parallel plate

• Cone and plate

• Cup and bob type system

• Synchronous motor system

What type of fluid is commonly associated with shear thickening behavior?

• Ketchup

• Corn starch in water

• Blood

• Paint

What is the main feature of a "pseudoplastic" fluid?

• Its viscosity increases as shear stress increases

• It behaves like a solid at low stress

• Its viscosity decreases as shear stress increases

• It has a yield point

Which of the following is a common application of a thixotropic fluid?

• Ink printing

• Blood transfusions

• Water treatment

• Cement mixing

What is a common example of a dilatant (shear thickening) material?

• Mayonnaise

• Corn starch in water

• Ketchup

• Yogurt

Which type of fluid exhibits a "yield stress" below which it behaves like a solid and above which it behaves like a liquid?

• Shear thinning fluid

• Plastic fluid

• Newtonian fluid

• Shear thickening fluid