1. (a) Discuss the various advantages of hydro metallurgy.
[8+8]
ld .
(b) Write a short note on various leaching techniques.
in
IV B.Tech I Semester Examinations,NOVEMBER 2010 LIGHT METALS AND ALLOYS Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
2. Discuss briefly about Mg - Al casting alloys and their mechanical properties.
3. Explain the pyrometallurgical method of extraction of zirconium from its minerals. [16] [16]
or
4. Write a note on properties and applications of Al-Li alloys. 5. (a) What do you mean by AZ92A? Discuss.
(b) Explain the microstructural changes AZ92A sand casting alloy during solidification and heat treatment. [8+8]
uW
6. Explain in detail, how Al2 O3 and Fe can be removed from Beryl ore leachant in Lime Sinter process. [16] 7. Prove thermodynamically the below given reactions of conversion of chlorine to tetrachloride during indirect chlorinate of TiO2 at 1020 0 C [16]
TiO2(g) + 2Cl2(g) = TiCl4(g) + O2 .
8. (a) How do the interstitial elements affect mechanical properties of commercially pure titanium?
?????
Aj
nt
(b) Why is 0.2 % Pd added to titanium? What is ‘E L 1’ commercially pure titanium? What are its special applications? [6+10]
1
[16]
Code No: 07A70608
R07
Set No. 4
in
IV B.Tech I Semester Examinations,NOVEMBER 2010 LIGHT METALS AND ALLOYS Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. List out the various unit operations to be performed in mineral dressing.
ld .
2. (a) Give the details of world wide distribution of Titanium ores.
[16]
(b) Write a short note on acid leaching of Ilmenite.
[6+10]
3. (a) What are the properties of Zinc? Why can not pure Zinc be strain hardened significantly at room temperature? (b) Give a brief applications of Zinc and its alloys.
[8+8]
[16]
5. What are inhibitors? What are their mechanisms to prevent corrosion?
[16]
or
4. Discuss in detail about the Lime sinter process for Beryl treatment.
uW
6. (a) Compare the melting points, densities, crystal structures of Magnesium, Aluminum and Iron. (b) Why are Magnesium alloys difficult to plastically deform at room temperature? (c) Give a classification of Magnesium alloys.
[5+5+6]
7. (a) What principal micro structural change occurs when α - titanium martensite is tempered at 500 0 C? (b) How is acicular α produced in Ti - 6%Al - 4%V? What is the mechanism of formation?
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(c) What types of microstructures are formed when Ti - 6%Al - 4%V alloy is cooled from 1066 0 C in the following ways:
Aj
i. Furnace cooling ii. Air cooling iii. Water quenching.
[5+5+6]
8. Explain why Hafium is removed from zirconium for use in nuclear reactors. Explain the process of removal of Hafium from zirconium in detail. [16] ?????
2
Code No: 07A70608
R07
Set No. 1
in
IV B.Tech I Semester Examinations,NOVEMBER 2010 LIGHT METALS AND ALLOYS Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Discuss about:
(b) Die casting of Magnesium alloys.
ld .
(a) Melting of Magnesium alloys
[8+8]
2. (a) Explain the corrosion behaviour of zinc compared to that of Al and Cr.
(b) Compare the advantages and disadvantages of zinc with respect to other light metals and its alloys. [6+10]
or
3. With a neat flow sheet explain the treatment of low grade ores by hydro metallurgy route. [16] 4. (a) What are the sources of Zirconium? What are the other minerals associated with Zirconium minerals?
uW
(b) What is the general treatment given to Zircon?
(c) What are the methods for separating Hafnium from Zirconium?
[4+6+6]
5. (a) Compare and contrast the corrosion behavior of Al and Mg? (b) Discuss the important properties of Titanium.
[8+8]
6. (a) What are the characteristics of Ti that makes it attractive for certain engineering applications?
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(b) How may α-β alloys can be strengthened. Discuss the properties and application of these alloys. [8+8]
7. (a) What are the main advantages and disadvantages of β - Ti alloy? (b) Why are β - Ti alloys mold cold formable than (α - β) Ti alloys?
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(c) Why do transformed or partly transformed structure in Titanium alloys have greater fracture toughness than equiaxed structures ? [6+5+5]
8. Write a short note on corrosion behavior of the following alloys: (a) Al-Si alloys
(b) Al-Li alloys.
[16] ?????
3
Code No: 07A70608
R07
Set No. 3
1. Write short notes on:
[8+8]
ld .
(a) Precipitation hardening in Mg base binary alloys (b) Corrosion resistance of Mg base alloys.
in
IV B.Tech I Semester Examinations,NOVEMBER 2010 LIGHT METALS AND ALLOYS Metallurgy And Material Technology Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
2. (a) Draw a graph to show the effect of ageing temperature of peak hardness of an alloy. (b) Draw a graph to show the effect of amount of solute on ageing curve. [8+8]
or
3. (a) Distinguish between a Mineral and Ore. (b) What is meant by a lean ore? Explain why lean grade ores are usually subjected to hydro metallurgical process for metal extraction. [6+10] 4. Explain in detail the theory of TiCl4 reduction in Kroll’s process.
[16]
uW
5. What elements and methods are there to improve the corrosion resistance of Mg and its alloys. Explain? [16] 6. (a) Explain about the following die casting zinc base alloys, with respect to i. Composition ii. Properties and iii. applications. (b) What is Calamine? Give its composition and chemical formula. What is the process by which the elemental metal is extracted. [12+4]
Aj
nt
7. (a) Describe the properties and uses of zirconium. (b) Write a short notes on i. Zirconium and its alloys ii. BARNS iii. Neutron-capture.
[8+8]
8. (a) What strengthening mechanisms are believed to be in the strengthening of Ti 6%Al - 4%V alloy after solution heat treating at 954 0 C and water quenching? (b) What strengthening mechanism is believed to cause the extra hardening after ageing a solution heated and quenched Ti - 6%Al - 4%V alloy 8 hours at 600 0 C? (c) How is fracture toughness of Ti alloys greatly increased? [6+5+5] ????? 4
tetrachloride during indirect chlorinate of TiO2 at 1020 0C · [16] · TiO2(g) + 2Cl2(g) = TiCl4(g) + O2. 8. (a) How do the interstitial elements affect mechanical properties of commercially · pure titanium? (b) Why is 0.2 % Pd added to titanium? What is 'E L 1' commercially pure · titanium? What are its special applications? [6+10].
(a) What is Radix-64 format? Explain how both PGP and S/MIME perform the · Radix-64 conversion is performed. (b) Describe the five principal services that ...
Farm in Maharashtra, supplied with water from a dug well pumping for 4 h a day, are given below. Determine the required discharge. [16]. 7. AjntuWorld.in ...
... carry equal marks · ***** · 1. List eight major functions of an exhaust nozzle. .... plane. Show the internal layout for swallowed air to reach the engine. Explain.
Enumerate difference between growth and non-growth associated product kinetics. [16] · 7. Write a brief note on biosensors, and describe how they are used for ...
(b) A turbine is to operate under a head of 30 m at 300 r.p.m. The discharge is ... 2. (b) An inward flow reaction turbine has an external diameter of 1 m and its.
(a) Discuss the response of high pass RC circuit for square wave input. (b) A 10Hz square wave is fed to an amplifier. Calculate and sketch the output wave ...
[16] · 8. With a neat sketch discuss the working procedure of neutron radiography, and also · give applications, advantages and limitations of this method. [16] · *****. 1 ... 5. (a) Give the limitations of x-ray diffraction method and ultrasonic met
register machine.(Hint: Use FNS). [8+8] · 5. (a) Explain the strassen's matrix multiplication · (b) Derive the time complexity for binary search. [8+8] · 6. (a) Find an ...
Variance · (b) The mean and variance of a binomial distribution are 2 and 8 / 5. Find ... marks were normally distributed with mean 70 and standard deviation 15.
Computer Science And Engineering · Time: 3 hours · Max Marks: 80 · Answer any FIVE Questions · All Questions carry equal marks · ***** · 1. (a) Distinguish between a packet-filtering router and a stateful inspection firewall? (b) âOne way to secure
1. With the help of a neat diagram indicating the various geometric elements of a · traffic rotary ... sight distance. What is the need to have SSD and factors.
2. Explain the alpha, delta, theta and beta waves emerging from the brain. [16] · 3. (a) Explain in detail on the isolation amplifiers used in medical field and its need ... Discuss the generation and propagation of action potential in a cell. [16] ·
(a) Steam pressure in a reactor heating coil. (b) Flow rate of reactants into a polymerization tank. (c) Flow of effluent from a waste water treatment holding tank into a river. (d) Flow of cooling water to a distillation condenser. [16] · 6. (a) Def
(a) State Newton's law of viscosity and give any four examples of its applications. (b) An oil of viscosity 8 poise is used for lubrication between a shaft and sleeve.
(a) Off - peak load is zero ... load current and p.f 0.1. capacitors are supplied to make the line power factor ... (b) The annual peak load of substation is 3500kW.
Set No. 2. (a) Construct a systematic (15,2) code using the generator polynomial .... taken. The bit rate is 'rb' and the channel noise has a PSD Gn(f) given by.
Discuss the principle of measuring the hardness of Heat Affected Zone using Jominey · hardenability test? .... (b) What is post weld heat treatment? Describe the ...
(a) State Darcy's law. Discuss the assumptions and limitations. .... 1. (a) State Stoke's law and explain its limitations as applicable to the sedimentation · analysis.
[4+4+4+4] · 4. Add a new method in the base class of Shapes.java that prints a message, but don't .... (d) Dynamic binding and message passing. [4+4+4+4].
Discuss clustering and solubility of liquid mixture. [16] · 3. Define: ... no adsorption at the pore wall and for the case with monolayer adsorption at the · pore wall.
Calculate the depth of indentation produced on a glass surface in ultrasonic ma- · chining by the throwing action of abrasive grain of 100 µm diameter.
