Subject Name : Engineering Materials and MetallurgySubject Code: ME2253

UNIT-I

2MARKS

1. What is the meaning of material science?2. How are materials classified?3. In what respect 'Conductors' differ from Semiconductors?4. Give the classification of magnetic materials. Explain briefly the following mechanical properties of metals5. Explain Elasticity, Plasticity, Ductility, Malleability and Hardness. 6. Write a short note on 'Superconductivity' 7. Explain briefly the process of crystallization of pure metal.8. What do you mean by 'Dendritic solidification? Show with the help of a diagram various step involved in the formation of crystal.9. Explain briefly the following:(i) Unit cell (ii) Space lattice(iii) Space lattice groups.10. What do you mean by 'Allotropy of metals' '? Explain.

16MARKS

1.Draw Fe-C diagram and mark all the phasesand explain the reactions? Solid phases in Fe-Fe3C phase diagram?2.What are the different types of cast iron? Draw the microstructure of any four types of cast iron?3.Isomorphous phase diagram for Cu-Ni system ?Ideal phase diagram(soluble and insoluble)4.Explain Hume Rothery rule ?5.Explain the different types of carbon steel?

UNIT-II

2MARKS1. State the objects of "annealing".2.Explain full annealing processes.3. What is accomplished by normalising ?4. Describe the "critical rate" of quenching.5.Name and explain the various quenching media used for heat treatment of steel.6. Explain hardening methods :7. Describe with a neat sketch Jominy hardenability test.8.Write a short note on 'Sub-zero treatment of steel'.9. What is the purpose of tempering?10. What do you mean by "Age hardening"?

16MARKS

1.Types of annealing Process and explain it?2.Explain Isothermal Transformation diagram(TTT)or(c-curve)or(s-curve)3.Explain Tempering process ? and explain CCT diagram?4.Explain :Martempering and Austempering 5.Explain case hardening process: i.Carburising ii)carbonitriding iii)induction hardening iv)Nitriding v)Flame hardening

UNIT-III

2MARKS1.Describe briefly any two of the following non-destructive tests2.Name the important mechanical test which give valuable informationabout metals and alloys.3.What does impact test signify ? Explain with necessary formulations,the procedures to be adopted in the impact test. conducted on a pendulumtype impact testing machine.4.What are different hardness tests of interest to the testing engineer undervarious situations ?5.Explain the Brinell hardness testing of mild steel specimen.6.What is a 'rebound test' ? How is it carried out ?7.What is a fatigue failure ? How is a fatigue test carried out?8.Explain briefly the procedure of conducting a torsion test.9.What is creep ?10. Draw a typical creep curve and explain the different stages of creep.

UNIT-IV2MARKS1. State the effects of adding following alloying elements to steel: Nickel, Chromium,.2. Give the composition, properties and uses of the following alloy steels : High speed steel, Silicon steel. 3. Enumerate the physical and mechanical properties of aluminium.4. State the importance of commercially pure aluminium as a general engineering material.5. How is copper manufactured '?6. What are the commercial alloys of aluminium? Briefly describe their composition and uses.7. What are the typical alloys of copper used in engineering'? Describe briefly their composition and uses.8. What are the pronounced effects of beryllium on the physical properties of copper'?9. What are the compositions, structure and characteristics of copper tin bronzes ? Why are these alloys used for springs ?10. What are the requirements of an alloy to be used as a bearing metal 16MARKS

1.Types of austenitic stainless steel and explain?2.Effect of alloying addition in steel.(types of alloy steel)3.Explain HSS and HSLA steel.4.Types of Copper alloy and explain?5.Types of Al alloy and explain?6.Precipitation strengthening.and explain bearing alloy

UNIT-V

2MARKS1.Short notes on following materials:i)PVC ii)PMMA 2.What is FRB?3.What is Elastomers?4.What is babbit ?5. What is temper embrittlenient ? How is it avoided ?6.Explain engineering ceramics.7.Describe glass manufacturing method?8.What is Fiber reinforced plastics.

16MARKS

1.Short notes on following materials:i)PVC ii)PMMA iii)PE iv)PP v)PEEK vi)PET2.Types of Engineering ceramic materials.3.short notes on Elastomers and Composites4.Explain FRP and FRC5.(i)Plastic and polymer Properties and application (ii)Thermo and thermosetting plastics (iii)addition and co polymerization6.special properties in polymer(i.Mechanical.ii,Thermal,iii,Electrical)