Question

In the fluid, when the flow velocity is constant at each point over time. Which term is applicable over this condition?

(a) Thermodynamic equilibrium

(b) Osmotic equilibrium

(c) Hydrostatic equilibrium

(d) Water pressure equilibrium

This question was addressed to me in an internship interview.

The query is from Thermodynamic Preliminaries in portion Material Balance of Bioprocess Engineering

Answer 1

The correct option is (c) Hydrostatic equilibrium

Explanation: In fluid mechanics, a fluid is said to be in hydrostatic equilibrium or hydrostatic balance when it is at rest, or when the flow velocity at each point is constant over time. This occurs when external forces such as gravity are balanced by a pressure gradient force.