Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3150505 Particle And Fluid Particle Processing Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3150505 Date:01/02/2021
Subject Name:Particle and Fluid Particle Processing
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Differentiate between cake filtration and clarifying filtration
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(b) Define separation factor for cyclone. List out factors affecting the performance 04
of the cyclone.
(c) A sludge forming a uniform non compressible cake is filtered through a filter 07
press out of which one frame is kept under study. At a certain pressure difference
of 2.8 kg/cm2, a 10 cm cake is formed in one hour with a filtrate volume of 6000
litres. 3 minutes are needed to drain the liquor from filter. 2 minutes are needed
to fill the filter with water. Washing proceeds exactly as filtration using 1200
litres. Opening, dumping and closing take 6 minutes. Assume the filtrate has the
same properties of wash water and neglect resistance offered by the cloth and
flow lines. How many litres of filtrate are produced in 24 hours on the average?
Q.2 (a) A tank 1.2 m in diameter and 2 m high is filled to a depth of 1.2 m with a latex 03
having a viscosity of 10 P and density of 800kg/m3. The tank is not baffled. A
three blade 360-mm diameter propeller is installed in the tank 360 mm from the
bottom. The pitch is 1:1.To drive the agitator at 800 rpm what should be the
capacity of motor? From graph Np=0.73
(b) Write short note on conditions for fluidization with neat sketch.
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(c) Explain construction and working of Bollman extractor for leaching operation.
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Q.3 (a) List out application of fluidization.
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(b) With neat sketch explain working of Tray drier for solids.
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(c) Discuss Kynch theory for design of continuous thickener.
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Q.4 (a) Define: (i) critical moisture content (ii) magma (iii) and mesh number.
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(b) Discuss mechanism of slurry transport.
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(c) Explain types of fluidization.
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Q.5 (a) State the various purpose of agitation of liquids.
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(b) Calculate the sphericity of a cylinder of diameter 1 cm and height 3 cm.
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(c) Discuss factors to be consider in scale up and selection of agitated vessels
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Q.6 (a) Differentiate between compressible cake and incompressible cake.
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(b) Discuss sink and float method of sorting classifiers.
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(c) Discuss various method for generation of supersaturation in crystallization.
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Q.7 (a) Write brief note on homogeneous nucleation.
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(b) Explain mechanism of drying through Porous solids.
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(c) Write short note on static mixers.
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Q.8 (a) Give significance of Power no, Reynolds no and Froude no for mixing of liquids. 03
(b) Air is moving upward in a bed of spherical coal particles of diameter 0.1 mm and 04
density 1000 kg/m3. The air properties are density = 2.4 kg/m3 and viscosity =
1.9 x 10-5 Pa.s. Find the minimum fluidization velocity and terminal settling
velocity of the particle. The void fraction of the bed is 0.38.
(c) Explain construction and working of fluidized bed reactor.
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This post was last modified on 04 March 2021