Download GTU B.Tech 2020 Winter 5th Sem 2150502 Mechanical Operation Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE- SEMESTER-V (NEW) EXAMINATION - WINTER 2020

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Subject Code:2150502 Date:01/02/2021

Subject Name: Mechanical Operation

Time:10:30 AM TO 12:30 PM Total Marks: 56

Instructions:

1. Attempt any FOUR questions out of EIGHT questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. Differentiate between constant rate filtration and constant pressure filtration (03)
2. Discuss mechanisms of filtration with schematic. (04)

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3. A plate and frame press gave a total of 8 m³ of filtrate in 1800 s and 11.3 m³ in 3600 s when filtration was stopped. Estimate the washing time if 3 m³ of wash water is used. The resistance of the cloth may be neglected and a constant pressure is used throughout. (07)

Q.2

1. Define (i) Sphericity (ii) Crushing efficiency (iii) screen capacity (03)
2. Explain principle of comminution. (04)
3. Draw various screen motions and give comparison of ideal and actual screen. (07)

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Q.3

1. Differentiate between clarifier and classifiers (03)
2. Discuss factors affecting performance of cyclone. (04)
3. Define fluidization. Explain the condition for fluidization with pressure drop and bed height vs. superficial velocity for bed of solids. (07)

Q.4

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1. Define: (i) angle of nip and (ii) mixing index (iii) and mesh number. (03)
2. Write a short note on tubular centrifuge. (04)
3. Discuss Kynch theory for design of continuous thickener. (07)

Q.5

1. What is the difference between differential analysis & cumulative analysis? (03)

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2. Write short note on storage of solids. (04)
3. Explain construction and working of rotary drum filter with its neat diagram. (07)

Q.6

1. State and explain various types of impeller used for liquid mixing. (03)
2. Discuss various methods for prevention of swirling. (04)

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3. Explain principle of ultrafiltration, types of membrane and membrane modules used for it. (07)

Q.7

1. List out applications of fluidization in chemical industry. (03)
2. Discuss principle and application of differential settling method. (04)
3. Explain basic principle of Ribbon blender and its industrial application. (07)

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Q.8

1. Give significance of Power no, Reynolds no and Froude no for mixing of liquids. (03)
2. Write short note on scale up of agitated vessel. (04)
3. What are the different types of conveyers? Explain the screw conveyer in detail. (07)

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