Gujarat Technological University 2009 B.E Chemical Engineering Fluid Flow Operation chemical.pdf - Question Paper
GUJARAT TECHNOLOGICAL UNIVERSITY
B.E. Sem-in(Chemical)Examination December 2009
Seat No. Enrolment No.
Subject code: 130502 Date: 19 / 12 /2009
Total Marks: 70
Subject Name: Fluid Flow Operation Time: 11.00 am - 1.30 pm
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Draw neat sketches/figures wherever required
Q.1 (a) Answer the following
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1. Convert 1 Pa to psi
2. Convert 1Pa-s to cP
3. The viscosity of the liquid increases with the temperature (True / false)
4. Give full form of NPSH, NPSHA
5. For fully developed flow the kinetic energy correction factor is_.
6. 1 cusec = 1ft1/sec. (True / false)
7. Which pump can be used for handling slurries?
(b) Explain any one method of dimensional analysis giving an example
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Q.2 (a) The temperature of earths atmosphere drops about 5C every 1000 m of elevation above the earths surface. If the air temperature at ground level is 15C and the pressure is 760 mmHg, At what elevation is the pressure is 570 mmHg? Assume that the air behaves as an ideal gas.
(b) For the following situations of steady flow, determine whether the flow is laminar or turbulent:
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(a) What is hydraulically smooth tube? Discuss effect of roughness on friction factor.
Q.3
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(b) A pump draws a solution of density 1800 kg/m3 is flowing from point A to point B The velocity in the suction pipe of 75 mm diameter is 0.9 m/sec. The pump discharges through a discharge pipe of 50 mm diameter to an overhead tank (point B) which is 15 m above point A. The frictional losses in the entire piping system are 30 J/kg .If point A and B are at atmospheric pressure, what pressure must the pump develop? (Assume pump efficiency = 60% )
OR
(a) Write in detail about drag and drag coefficient.
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(b) Discuss construction and working of an orifice meter and derive equation for volumetric flow rate for the same.
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Q.4 |
(a) |
Write in brief about Gate valves and Globe valves |
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(b) |
Discuss Suction lift , Cavitation and Priming in centrifugal pumps OR |
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Q.4 |
(a) |
Discuss the construction and working of a rotameter. |
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(b) |
Explain the principle and working of coriolis meters |
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Q.5 |
(a) |
Explain Skin friction and form friction |
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(b) |
Write a brief note on types of fluidization and its application in chemical industry OR |
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Q.5 |
(a) |
Define Hydraulic radius derive the expression for equivalent diameter for a square duct of dimension a unit. |
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(b) |
Write a brief note on Fans, blowers and compressors used in chemical industry. ************* |
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2
0.2 m/s in a 20 mm tube
OR
(b) Derive Hagen-Poiseuille equation.
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Attachment: |
| Earning: Approval pending. |
