Download SGBAU B-Tech 5th Sem Mechanical Operations Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 5th Sem Mechanical Operations Previous Question Paper

B.chh. Fifth Semester (Che. Tech. (Food, P & P, O & P and Petro.) (CGS)
11026 : Mechanical Operations : 5 CT 02
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Max. Marks: 80
1?. Pages : 2
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Time : Three Hours
Notes : 1. A11 question carry marks. as indicated.
2. Answer three question from Section A and three question from Section B.
3. Due credit will be given to neatness and adequate dimensions.
4. Assume suitable data wherever necessary.
5. Illustrate your answer necessary with the help of neat sketches.
6. Use of pen Blue/Black ink/re?li only for writing the answer book.
SECTION - A
l a) Define the following terms. 9
a) S?phericity b) Speci?c surface area of mixture
c) Average particle size
b) What are the factors to be considered while selecting a screening equipment's? 5
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2. A quartz mixture having analysis shown in table is screened through a standard 10 mesh 14
screen. Calculate mass ratios of over?ow and under?ow of feed and overall effectiveness
of screen. _ .2
Mesh Dp mm Mass retained in gms
Number Feed Over?ow Under?ow
4 4.699 _0W 0 -
6 3.327 25 49.7 -
8 2.362 125 251.3 0
10 1.651 320 294 58.5
14 1168 260 84 115.5
20 0.833 155 . 15.4 75
28 0.589 55 7 _ 24 '
35 0.417 20 - 9
65 0.208 20 - 6
Pan --- 20 - 12
a) Calculate the settling velocity for hindered settling of glass spheres in water at 68?F. thn
the suspension contains 1206 gm of glass spheres in 1 140 cm3 of total Vol'?. The average
diameter of the sphere was 0.0061 inch and the true density of the sphere is 154 113/113.
b) Explain the following terms.
1)
Drag force
2)
OR
Terminal settling velocity
a) Explain the construction and working of hydraulic Jig with Diagram.
b) Explain any one mechanical classi?er with Diagram.
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P.T.O

5. a) Explain Axial ?ow impellers and radial ?ow impellers with suitable examples.
b) Give the advantages and disadvantages of screw conveyer.
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6. 3) Explain the following terms.
1) Angle of Repose 2) Bulk density
b) Give the properties of paddles.
c) Draw the sketch of any four propellers used in mixing operations.
SECTION - B
7. a) Explain Electro?otation with the help of Diagram.
b) Explain the working of rotary Drum ?lter with neat Diagram.
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8. a) Explain any one flotation machine with the help of Diagram.
b) A plate and frame preSS. ?ltering a slurry, gave a total of 8m3 rof ?ltrate in 1800 seconds
and 11m3 in 3600 seetinds, when ?ltration was stopped. Estimate the washing time in
seconds if 3 m3 of wash water was used. The resistance of the cloth can be neglected and a
constant pressure is used throughout.
9. a) Explain the methods to charge a solid particles with the help of suitable diagram.
b) Give the comparison between sedimentation & centrifuge.
OR
10. a) Explain the principle of electrostatic separator.
b) Explain the following
1) Cyclone design 2) Particle size separation
3) Ef?ciency of cyclone.
11. a) Give the industrial application ol?adsorption.
b) Explain Langmuir isotherm.
OR
12. a) Explain pressure swing adsorption.
b) Describe the signi?cance of break through curve with neat sketch.
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