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c) 2.

3.a) b) c) 4.a) b)

Write about a) Feeding and discharge methods of a belt conveyor b) Width and speed of belt c) Weight of belt.

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b)

State the similarities and differences between the properties of solid particles and fluids. How are particulate solids classified depending on their flow properties? Give examples. Write in detail about bin storage and bulk storage. [4+4+8]

[8+4+4]

Mention the characteristic ways in which the size reduction equipment do their work. State the characteristics of an ideal crusher. Discuss the characteristics of comminuted particles. [4+4+8] Write about the construction and working of a horizontal belt filter with a neat diagram. Write in detail about automatic batch centrifuges. [8+8]

uW

1.a)

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III .B.TECH – I SEM REGULAR EXAMINATIONS JANUARY- 2010 MECHANICAL UNIT OPERATIONS (CHEMICAL ENGINEERING) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

What is continuous filtration? Derive a relation between the total filter area and the pressure drop across the filter in a continuous filtration unit. [16]

6.

Discuss differential settling method of separation for separating particles of different densities. Show how the sharpness of separation is related to density of the medium, with suitable equations. [16]

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5.

Describe the various flow patterns in agitated vessels. What is swirling? How does it occur? Is it desirable in agitation? If not suggest some measures to prevent it. [8+8]

8.a)

Define invariant crystal. How is the concept of invariant growth useful in analyzing the crystallization process? Define purity of a crystal. Explain calculation of yield for a crystallization process. [16]

Aj

7.a) b)

b) c)

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