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Posted By: kondapalli Member Level: Gold Posted Date: 08 May 2008
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2007 Jawaharlal Nehru Technological University B.Tech Chemical engineering MECHANICAL UNIT OPERATIONS setno4 Question paper
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1. (a) State the similarities and differences between the properties of solid particles
and fluids. [6]
(b) How are particulate solids classified depending on their flow properties? Give
examples. [4]
(c) Write in detail about bin storage and bulk storage. [6]
2. Write about the power consumption for different types of mixing equipment. [16]
3. (a) What are various laws of size reduction? State each one of them with their
limitations. [10]
(b) Which law is more realistic in estimating power requirement of a commercial
comminuting machine? Give answer with justification. [3]
(c) State the generalized relation for all the laws of size reduction. [3]
4. Write short notes on.
(a) Ideal and actual screens. [8]
(b) Capacity and effectiveness of screens. [8]
5. What are the different types of membranes and discuss them in detail with their
applications. [16]
6. (a) Write a note on sludge-separators. [8]
(b) Describe helical-conveyor centrifuge with a neat diagram. [8]
7. What do you understand from the pitch of the agitator ? Mention the applications
of flat bladed turbine , pitched turbine & Propeller agitator. [16]
8. (a) What is the rate of nucleation? Explain attrition and origins of crystals in
crystallizers. [10]
(b) Explain the phenomenon of nucleation. [6]
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