GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Name: Solid-Fluid Operations
Time: 10:30 AM TO 01:00 PM
Subject Code: 2180508
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019Subject Name: Solid-Fluid Operations
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) Define agitation and mixing. State various purposes of agitation. (03) |
| (b) What are conveyors? Describe the transportation of material through belt conveyor. (04) | |
| (c) Classify solid fluid operations. Explain various solid fluid operations with suitable example. (07) | |
| Q.2 | (a) Define fluidization and explain minimum fluidization velocity. (03) |
| (b) Describe the term crystallization. State various applications of Crystallization. (04) | |
| (c) Explain construction and working of plate and frame filter press with its advantages and limitations. (07) | |
| OR | |
| (c) Explain in detail: Slurry bed reactor (07) | |
| Q.3 | (a) Write in brief about types of nucleation in crystallization. (03) |
| (b) Enlist various types of conveyors. Explain screw conveyor for transportation of pasty materials. (04) | |
| (c) Describe flow of fluid through porous solid beds and derive Ergun equation. (07) | |
| OR | |
| (c) Explain the phenomenon of crystals growth in brief. (07) | |
| Q.4 | (a) A disc turbine with six flat blades is installed centrally in a vertical baffled tank 2.0 m in diameter. The turbine is 0.67 m in diameter and is positioned 0.67 m above the bottom of the tank. The turbine blades are 134 mm wide. The tank is filled to a depth of 2.0 m with an aqueous solution of 50 percent NaOH at 65°C, which has a viscosity of 12 cP and a density of 1500 kg/m³. The turbine impeller turns at 90 r/min. What power will be required? If Nre < 10,000 take Np=65 and If Nre > 10,000 take Np=5.8 (03) |
| (b) Explain in detail about conditions for fluidization. (04) | |
| (c) Explain in brief: Static Mixers (07) | |
| OR | |
| (a) Write short note on ‘Slurry transport’. (03) | |
| (b) Explain in detail: Moving bed reactor (04) | |
| Q.5 | (a) Explain in brief: Heating and cooling mixers (03) |
| (b) Write short note on pneumatic conveying system. (04) | |
| (c) Explain in detail: Fixed bed reactor (07) | |
| OR | |
| (a) List out various industrial applications of Fluidization. (03) | |
| (b) Define Drying. Classify various dryers used in drying process. (04) | |
| (c) Enlist various types of centrifuge. Explain in detail suspended batch centrifuge with neat sketch. (07) | |
| OR | |
| (a) Describe particulate fluidization in brief. (03) | |
| (b) Explain the term Leaching. State various applications of Leaching. (04) | |
| (c) Define sorting classifiers. Explain ‘sink and float’ method for sorting classifiers. (07) |
Total Marks: 70
Date: 13/05/2019
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