Question

From the given graph of shear stress Vs strain rate the X and Y depicts ————— fluid property.

• A. X-Pseudo plastic, Y-Newtonian
• B. X-Dilatant, Y-Bingham plastic
• C. X-Newtonian, Y-Thixotropic
• D. X-Thixotropic, Y-Dilatant

Hint:

In fluid mechanics, the type of fluid (pseudo-plastic, Bingham plastic, etc.) determines how the fluid's viscosity changes with shear stress.

Answer 1

The Correct Option is A

In the given shear stress versus strain rate graph: 
- Pseudo-plastic fluids (X) show a decrease in viscosity with increasing shear rate. 
- Newtonian fluids (Y) exhibit a constant viscosity, meaning the shear stress is directly proportional to the strain rate.
- Dilatant and thixotropic fluids exhibit changes in viscosity with different shear rates, but not in the way described by this graph. 
Conclusion: Option (a) correctly identifies the fluid properties for X and Y.