Exams › GATE › Technical

The following figure shows a plot between shear stress and velocity gradient for materials/fluids P, Q, R, S, and T. Which one of the following options is CORRECT?

1. P → Ideal Fluid; Q → Ideal Bingham plastic R → Non-Newtonian fluid; S → Newtonian fluid
2. P → Real solid; Q → Ideal Bingham plastic S → Newtonian fluid; T → Ideal Fluid
3. P → Ideal Fluid; Q → Ideal Bingham plastic R → Non-Newtonian fluid; T → Real solid
4. P → Real solid; Q → Newtonian fluid R → Ideal Bingham plastic; T → Ideal Fluid

Correct answer: P → Ideal Fluid; Q → Ideal Bingham plastic R → Non-Newtonian fluid; T → Real solid

Solution

The correct option accurately categorizes the materials based on their behavior in response to shear stress and velocity gradient, identifying P as an ideal fluid that exhibits no viscosity, Q as an ideal Bingham plastic which requires a yield stress to flow, R as a non-Newtonian fluid that does not have a constant viscosity, and T as a real solid that does not flow under shear stress.

Related GATE Technical questions

• For a thin-walled section shown in the figure, points P, Q, and R are located on the major bending axis X - X of the section. Point Q is located on the web whereas point S is located at the intersection of the web and the top flange of the section. Qualitatively, the shear center of the section lies at
• Consider the following data for a project of 300 days duration. Budgeted Cost of Work Scheduled (BCWS) = Rs. 200 Budgeted Cost of Work Performed (BCWP) = Rs. 150 Actual Cost of Work Performed (ACWP) = Rs. 190 The ‘schedule variance’ for the project is
• The structural design method that DOES NOT take into account the safety factors on the design loads is
• Which one of the following saturated fine-grained soils can attain a negative Skempton’s pore pressure coefficient (A)?
• Which one of the following products is NOT obtained in anaerobic decomposition of glucose?
• For a reconnaissance survey, it is necessary to obtain vertical aerial photographs of a terrain at an average scale of 1:13000 using a camera. If the permissible flying height is assumed as 3000 m above a datum and the average terrain elevation is 1050 m above the datum, the required focal length (in mm) of the camera is

⚔️ Practice GATE Technical free + battle 1v1 →