GATE XE 2021 Paper 1 — page 8

Questions 22–24 of 175. Imported answers require review unless explicitly marked reviewed.

The general relationship between shear stress,

, and the velocity gradient

for a fluid is given by

, where

is a constant with appropriate units. The fluid is Newtonian if

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which one of the following options is TRUE?

Your answerChoose one option.

Pathlines and streaklines are the same in an unsteady flow, and streamlines are tangent to the local fluid velocity at a point.

Streamlines are perpendicular to the local fluid velocity at a point, and streamlines and streaklines are the same in a steady flow.

Pathlines and streaklines are the same in an unsteady flow, and streamlines and streaklines are the same in a steady flow.

Streamlines are tangential to the local fluid velocity at a point, and streamlines and streaklines are the same in a steady flow.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

and

are the average pressures at inlet and outlet respectively for a fully-developed flow inside a channel having a height of

, then the absolute value of average shear stress (in Pa) acting on the walls of the channel of length

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

2021 · Paper 1