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Posted By: santosh kumar kanugula Member Level: Gold Posted Date: 28 Jun 2008
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2007 Jawaharlal Nehru Technological University B.Tech Chemical engineering FLUID MECHANICS Question paper
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Code No: RR210801 Set No. 4
II B.Tech I Semester Supplementary Examinations, February 2007
FLUID MECHANICS
(Chemical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Why the pressure measurement is important. Classify the pressure measuring
devices. [6]
(b) Explain the construction, Principle of a simple U-tube manometer and derive
the equation for pressure drop. [10]
2. Derive the three dimensional equation of continuity. [16]
3. A liquid is flowing through a horizontal pipe of diameter 0.0525m and length 1m
with a velocity of 4.57 m/s. The viscosity of the liquid is 4.46 cp and the density
801 kg/m3. Calculate the skin friction. The friction factor is given as 0.006. [16]
4. Calculate the pressure gradient , the average velocity and the Reynolds number
of operation if the maximum shear stress is measured as 200N/m2 for the flow of
glycerine of viscosity 7 Poise and specific gravity is 1.3 in a pipe of diameter 10 cm.
[16]
5. Air at 1.7 atm gauge and 150C enters a horizontal steel 75mm pipe, 70 m long .
The velocity at the entrance of the pipe is 60 m/s . Assuming isothermal flow,
what is the pressure at each discharge end of the line? [16]
6. Estimate the terminal velocity of 0.2 mm diameter spherical particles of density
2800kg/m3 which are freely falling in liquid of viscosity 5Cp and density 1000
kg/m3. [16]
7. What are the types of fluidization. Write the equations used to calculate pressure
drop in fluidized beds. [16]
8. A pitot tube is used to measure the flow rate of water at 200C in the center of
a pipe having an inside diameter of 102.3 mm .The manometer reading is 78 mm
of carbon tetra chloride at 200C. The pitot tube coecient is 0.98. Calculate the
velocity and volumetric flow rate .The density of water is 1 gm/cc and that of
carbon tetrachloride is 1.6 gm/cc. [16]
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