Sathyabama University 2008 B.Tech Chemical Engineering Material Science and Technology - Question Paper
SATHYABAMA UNIVERSITY
(Established under section 3 of UGC Act, 1956)
Course & Branch: B. Tech Chemical (Part Time)
Title of the paper: Material Science and Technology
Semester: II Max. Marks: 80
Sub.Code: 619PT202 (2007/2007 JAN) Time: 3 Hours
Date: 14-05-2008 Session: FN
PART A (10 x 2 = 20)
Answer All the Questions
1. What are the constituents of stainless steel?
2. Name any four applications of powder metallurgy.
3. What is meant by stress relaxation?
4. Define fatigue damage.
5. Draw the stress-strain diagram.
6. State the parallel and perpendicular axis theorem.
7. Why some overhanging beams have point of contra flexure?
8. What are the relationships among bending moment, shear force, and applied distributed load for a beam?
9. What are torsional rigidity and flexural rigidity?
10. What are the uses of leaf springs?
PART B (5 x 12 = 60)
Answer All the Questions
11. Draw the equilibrium phase diagram of iron-carbon system and discuss the various transformations that take place.
(or)
12. Classify metals. Write in detail about the properties and applications of various types of metals.
13. What do you understand by creep? Draw a creep curve and explain the different stages of a creep curve. Explain different mechanisms of creep.
(or)
14. Define corrosion. Discuss in detail about various corrosion prevention and corrosion control methods.
15. A steel rod of 20 mm passes centrally through a copper tube of 50 mm external diameter and 40 mm internal diameter. The tube is closed at each end by rigid plates. If the temperature of the assembly is raised by 50C, calculate the stresses developed in copper and steel. Take Es = 200 kN/mm2, Ec = 100 kN/mm2, as = 12 x 10-6 per C, ac = 18 x 10-6 per C.
(or)
16. a) Explain in detail about the thermal stresses in simple and composite members. (8)
b) Write notes on radius of gyration of sections. (4)
17. Derive relations for slope at the supports and maximum deflections for the beam given in 16 using Moment Area method.
(or)
18. A simply supported beam ACB of span 4m, carrying a load of 100 kN at its mid span C has cross sectional moment of inertia 24 x 106 mm4 over right half CB. Find the slopes at the two supports and the deflection under the load. Take E = 200 GPa. Use conjugate beam method.
19. A close coiled helical spring is to have a stiffness of 1000 N/m in compression with a maximum load of 150 N and a maximum shearing stress of 100 N/mm2. The solid length of the spring (i.e, coils are touching) 80 is mm.
(or)
20. Three beams have the same length, same allowable stress, and the same bending moment. The cross sections of the beams are a square, a rectangle with depth twice the width, and a circle. Determine the ratios of weights of the circular and the rectangular beams with respect to the square beam.
| Earning: Approval pending. |
