Jawaharlal Nehru Technological University Hyderabad 2007 B.E Chemical Engineering MATERIAL SCIENCE FOR CHEMICAL ENGINEERS SET 1 - Question Paper

Code No: R05220804 Set No. 1
II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2007
MATERIAL SCIENCE FOR CHEMICAL ENGINEERS
(Chemical Engineering)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks
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1. (a) State Heisen berg uncertainly principle and discuss briefly.
(b) State Pauli Exclusion Principle and discuss briefly. [8+8]
2. (a) compute the density and packing efficiency of the NaCl crystal
(b) Write the most important voids closed packed structures and discuss briefly.
[8+8]
3. Distinguish among the direction of the dislocation line, the Burgers vector and
direction of dislocation motion for
(a) an edge and
(b) a screw dislocation. [16]
4. (a) What is phase diagram?
(b) discuss the application of phase diagrams with special reference to manufac-
ture of steels. [8+8]
5. elaborate the outstanding properties of aluminium? provide a few examples of age
hardenable aluminium alloys and their applications. [16]
6. (a) What is viscoelastic behavior? In which material is it commonly found?
(b) discuss the macroscopic models of Maxwell and Voigt-Kelvin used to define
viscoelastic behavior of materials. [4+12]
7. (a) discuss the fatigue behavior of materials with the help of S-N curves.
(b) discuss how a fatigue fracture occurs and provide examples of fatigue fracture.
(c) Suggest ways to improve the fatigue life of a component. [8+4+4]
8. (a) Write about electrode potential, standard electrode potential of metals.
(b) discuss passivation and polarization in detail. [8+8]
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Earning:   Approval pending.