GATE 2025 Chemical Engineering, Q18 · Fluid Mechanics
The correct answer is C, Lift.
Question
The sum of the components of the force due to pressure and shear at the solid-fluid boundary of a solid body in the direction normal to the flow is
Official answer: Lift
Why
GATE 2025 official key: (C). The force component parallel to the flow direction is drag; the component normal to the flow direction is lift.
Explanation cross-checked for consistency. Final answer matches the official IIT answer key.