GATE XE 2022 Paper 1 — page 13

Questions 37–39 of 175. Imported answers require review unless explicitly marked reviewed.

Consider two-dimensional turbulent flow of air over a horizontal flat plate of length 1 m. Skin friction coefficient at a length

from the leading edge of the plate is obtained as:

where,

is the local Reynolds number. Find out the drag force per unit width (in N/m

) on the plate if the free stream air velocity is 10 m/s. Density and dynamic viscosity of air are given as 1.2 kg/m

and

N-s/m

, respectively. (Round off to three decimal places)

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

For an inviscid fluid with density 1 kg/m

, the Cartesian velocity field is given as:

Neglecting the body forces, find the magnitude of pressure gradient (in Pa/m) at

. (Round off to two decimal places)

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

Consider a lawn sprinkler with horizontal arms of radius,

cm which has water introduced vertically through the centre, as shown in the figure. The exit area of the jet is 25 cm

and the jet velocity is 1 m/s. The water is ejected orthogonal to the sprinkler arm and the jet makes an angle of 60° with the horizontal plane. Find the torque (in N-m) required to hold the sprinkler stationary. Consider water density 1000 kg/m

. Neglect the effects of friction and gravity. (Round off to two decimal places)

Diagram for Engineering Sciences question 39

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

2022 · Paper 1

Question 37

Question 38

Question 39