Question

Incompressible flow is the one in which density is ___________

(a) 0

(b) constant

(c) varies from point to point

(d) negligible

I have been asked this question in a national level competition.

My question is based upon Incompressible Flow in Duct in chapter Inviscid & Incompressible Flow of Aerodynamics

Answer 1

The correct choice is (b) constant

To explain I would say: In incompressible flow, the density remains constant because of which the fluids cannot be compressed and are called as incompressible fluids. Water is the best example of incompressible fluids. But still some extent we can compressible water.