GATE XE 2017 Paper 1 — page 11

Complete GATE XE 2017 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 31–33 of 175. Imported answers require review unless explicitly marked reviewed.

Paper practice 175 questionsPage 11 of 59

Air flows over a smooth flat plate at a velocity of 4.39 m/s. The density of air is 1.031 kg/m³ and the kinematic viscosity is 1.34×10⁻⁵ m²/s. The plate length is 12.2 m in the direction of the flow. The boundary layer thickness (

) is given as

, where

is the distance from the leading edge and

is the Reynolds number. The boundary layer thickness (in meters, rounded off to the second decimal place) at 12.2 m from the leading edge will be ________

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A venturimeter of diameter 0.2 m at the entrance and 0.1 m at the throat is inclined upwards. The vertical elevation difference between the entrance and the throat is 0.5 m. The density of water is 1000 kg/m³ and the coefficient of velocity is 0.97. The differential U-tube manometer connected to the entrance and throat shows a pressure difference of 30 kN/m². Assume acceleration due to gravity as 9.81 m/s². The velocity of the water (in m/s, rounded off to the first decimal place) at the throat would be ________

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A spherical bubble of radius

is rising upward with a constant velocity

, in quiescent water of dynamic viscosity

. The density of air and water are denoted by

and

, respectively, and

is acceleration due to gravity. The bubble motion is such that the Reynolds number,

. The density of air can be neglected in comparison to the water density (

). Which one of the following expressions is TRUE for the density of water?

Your answerChoose one option.

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2017 · Paper 1

Question 31

Question 32

Question 33