Download GTU BE/B.Tech 2019 Summer 4th Sem New 2143506 Unit Operations I Question Paper

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BE - SEMESTER-IV(NEW) — EXAMINATION - SUMMER 2019

Subject Code:2143506 Date:15/05/2019

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Subject Name: Unit Operations-I

Time:02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.

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3. Figures to the right indicate full marks.

Q.1

1. Define: sphericity, terminal settling velocity and constant rate filtration. 03
2. Write a short note on Trommel screen. 04
3. Explain the principle, construction and working of a jaw crusher with a neat sketch. 07

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Q.2

1. Write difference between crushers and grinders. 03
2. Write note on attrition mill, giving outline-sketch. 04
3. Derive the equation for critical speed of ball mill. 07

OR

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1. Explain the principle, construction and working of a roll crusher with a neat sketch. 07

Q.3

1. Define: filter media, filter aid and filtrate. 03
2. What should be the criteria for selection of size reduction equipments? 04
3. With the help of a neat sketch explain the construction and working of a magnetic separator with its application. 07

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OR

1. Classify different types of filtration equipments: 03
2. Explain the need of size reduction in process industries. 04
3. With the help of a neat sketch explain the construction and working of a cyclone separator with its application. 07

Q.4

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1. Write applications of sedimentation. 03
2. Discuss the process of Dorr thickener. 04
3. Explain construction and working of plate and frame filter press with neat sketch. 07

OR

1. Explain hindered settling and free settling. 03

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2. Describe in detail Lamella clarifier. 04
3. What is filter medium resistance? Explain it and derive the mathematical expression for constant pressure filtration. 07

Q.5

1. Write difference between ideal screen and actual screen. 03
2. Write laws of size reduction. 04

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3. Explain construction and working of bowl centrifuge. 07

OR

1. Define: screen effectiveness and screen capacity. 03
2. What is the difference close circuit grinding and open circuit grinding? 04
3. Explain construction and working of bowl centrifuge. 07

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