Q.1
14 Marks(a)
Differentiate: Particulate fluidization and Bubbling fluidization
(b)
Explain in brief: Heating and cooling mixers
(c)
Define sorting classifiers. Explain the ‘sink and float’ method for sorting classifiers.
Gujarat Technological UniversityWinter 2023 examination
GTU 3150505 Particle and Fluid Particle Processing Winter 2023 Question Paper & PDF
B.E. · Chemical Engineering · Semester 5 · Subject code 3150505
- Total
- 70 marks
- To pass
- 23 marks (33%)
- Duration
- 2.5 Hours 10:30 AM – 1:00 PM
- Questions
- 5 with internal choice
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Q.2
14 Marks(a)
Classify solid-fluid operations.
(b)
Explain Tray drier for solids in brief.
(c)
Explain with a neat sketch the construction and working of rotary drum vacuum filter and enlist its advantages and limitations.
OR
(c)
A sludge filtered in a washing plate and frame press is of such a nature that the filtration equation is V² = Kt, where V is the volume of the filtrate obtained in time t; when the pressure is constant, 40 cubic meters of filtrate is produced in 10 hrs.
i)4 cubic meters of wash water is forced through the cake at the end of
the filtration. What is the washing time?
ii)If the filtering surface of the press is doubled, all other conditions
remain constant; how long does it take to produce 40 cubic meters
of filtrate?
Q.3
14 Marks(a)
Differentiate: Homogeneous nucleation and heterogeneous nucleation
(b)
Explain various solid-fluid operations with suitable examples in brief.
(c)
Explain the fluid flow in porous solid beds and derive the Kozeny-Carman equation.
OR
(a)
Discuss in brief: Growth of crystals
(b)
Explain the terms:
i)screen capacity
ii)screen effectiveness
(c)
Explain slurry and pneumatic transport systems in detail.
Q.4
14 Marks(a)
Explain the terms mixing and agitation with examples.
(b)
Explain the terms:
i)Fluidization
ii)Minimum fluidization velocity
(c)
A certain set of crushing rolls of 150 cm in diameter by 50 cm width face. They are set so that the crushing surfaces are 1.25 cm apart at the narrowest point. The manufacturer recommends 100 rpm as the roll speed. They are to crush a rock having a specific gravity of 2.35 and an angle of nip is 30°.
i)What are the maximum permissible size of feed and the maximum actual
capacity in metric tons per hour if the actual capacity is 12 % of the
theoretical?
ii)After long use, the tires on the rolls of the mill have become roughened
so that the angle of nip is 32°30’. What will now be the maximum
permissible size of feed and the capacity of the rolls?
OR
(a)
Explain in brief: Static Mixers
(b)
Discuss various applications of fluidization.
(c)
A disc turbine with six flat blades is installed centrally in a vertical baffled tank 1.83 m in diameter. The turbine is 0.61 m in diameter and is positioned 0.61 m above the bottom of the tank. The turbine blades are 127 mm wide. The tank is filled to a depth of 1.83 m with an aqueous solution of 50 percent NaOH at 65.6°C, which has a viscosity of 12 cP and a density of 1498 kg/m³. The turbine impeller turns at 90 r/min. What power will be required to operate the mixer? If NRe < 10,000 take NP =5.6, and NRe > 10,000 take NP= 5.8
Q.5
14 Marks(a)
Explain in brief: Vibrating screen
(b)
Define the separation factor for the cyclone separator. List out factors affecting the performance of the cyclone separator.
(c)
Explain construction and working of the Bollman extractor for leaching operation in detail.
OR
(a)
Explain the screw conveyor in brief.
(b)
Explain in brief: Calculation of power required for agitation
(c)
Explain the Slurry bed reactor in detail.
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About this paper
Official Gujarat Technological University (GTU) examination paper for Particle and Fluid Particle Processing (Winter 2023, B.E. · Chemical Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.