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ISRO ME 2019 Fluid Mechanics and Machinery 4
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Question 1
If the velocity distribution over a plate is given by u = 
y - 
in which u is the velocity in m/s at a distance y meter above the plate. The value of shear stress at y =0.15m from the plate will be (µ = 0.463 Ns/m2)
y - in which u is the velocity in m/s at a distance y meter above the plate. The value of shear stress at y =0.15m from the plate will be (µ = 0.463 Ns/m2)Question 2
The barometer reads 740 mm of Hg, what would be the absolute pressure? Let intensity of pressure be 30 kPa and take specific gravity of mercury = 13.6
Question 3
Consider the two-dimensional velocity field given by 
where 
are constant. Which one of the following conditions needs to be satisfied for the flow to be incompressible?
Question 4
A pitot tube measures a differential pressure of 0.008 bar. What is the speed of the plane, if it is flying at a height of about 12000 m. Take density of air at this height 0.31 kg/m3
Question 5
In a turbulent flow through the pipe the mean velocity is 3m/sec and friction factor f = 0.03. The shear velocity of flow is …….m/sec.
Question 6
A centrifugal pump is designed to handle a head of 60m under atmospheric condition. If vapour pressure of the water is 4.25 kPa at atmospheric condition and Thoma’s cavitation factor is 0.12, then NPSH will be (in m)
Question 7
An incompressible fluid flows over a flat plate with zero pressure gradient. The boundary layer thickness is 2 mm at a particular location. In an another case when location is at 50% more distance from the leading edge as compared to previous one, density of fluid is decreased by 20%, dynamic viscosity increases by 40% and velocity of fluid increased by 30%, what will be the boundary layer thickness?
[Consider flow to be laminar in both cases]
[Consider flow to be laminar in both cases]
Question 8
Oil having density of 800 kg/m3 and viscosity of 0.2 N-s/m2 is flowing through a pipeline of 50 mm diameter at an average velocity of 2 m/s. The Darcy friction factor for the flow is _________.
Question 9
In a developed laminar flow the average velocity is 9 m/s, the radius of pipe is 20 cm. What will be the velocity (m/s) at 15 cm radius?
Question 10
Kaplan turbine is a:
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