II B.Tech I Semester Supplimentary Examinations, May/Jun 2009 PHYSICAL METALLURGY (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) With a neat line diagram of scanning electron microscope, explain the working principle involved in it.
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(b) Mention the advantages associated with scanning electron microscope. [10+6] 2. (a) The atomic radius of Iron is 1.24 A0 . Calculate the lattice parameter of BCC and FCC iron.
3. Write short notes on the following: (a) Transformation of indices
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(b) Determine the number of lattice points per unit cell in the simple cubic, face centered cubic and body centered cubic crystal systems. [7+9]
(b) Miller indices of a plane and direction.
[8+8]
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4. (a) Describe Vegards Law with examples.
(b) Explain why alloy find more applications than pure metals? (c) Explain why if one element is highly electronegative and other highly electro positive the intimate mixture of them is not an alloy? [5+5+6]
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5. (a) Suppose that the solid nickel was able to nucleate homogeneously with an under cooling of only 220 C. How many atoms would have the group together spontaneously for this to occur. Assume that the lattice parameter of the solid FCC nickel is 0.356 nm. Data Nickel freezing temperature : 14530 C Surface energy : 255 × 10−3 J/m2 Latent heat of fusion : 2756 × 106 J/m2
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(b) Explain the difference between planar growth and dendritic growth.
[8+8]
6. What is an invariant reaction? List and Explain any three such reactions. Present in the same. Equilibrium diagram. [16] 7. (a) Explain with neat diagrams how the micro-structure of a pure metal may change with additions of alloying elements. (b) What is allotropy & Discuss various allotropic forms of Iron & their properties. [8+8] 8. (a) Differentiate between CCC & TTT diagrams. 1 of 2
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Code No: NR211801 (b) Explain about the bainitic transformation.
NR211801 II B.Tech I Semester Supplimentary Examinations, May/Jun ...
(a) Describe Vegards Law with examples. (b) Explain why alloy find more applications than pure metals? (c) Explain why if one element is highly electronegative ...
[8+8]. (b) Explain the working of a single stage impulse turbine. 8. (a) Enumerate the advantages and disadvantages of gas turbines. [8+8]. 1 of 2. AjntuWorld.in ...
(b) Describe various types of heat exchangers based on temperature ... (c) Explain the mechanism of heat transfer by radiation. [5+6+5] ... (a) Thermal diffusivity.
[8+8] · 7. (a) How will you prepare Thiophene? What are its chief uses? [5+3] · (b) What will happen when Quinoline and Isoquinoline are treated with alkaline.
(a) Give an overview of C++ class structure? (b) Compare the ... What is the difference between the C++ standard library, and the C++ standard · template library ...
NR. II B.Tech I Semester Supplimentary Examinations, May/Jun 2009 ... (b) The electric vector E of an electromagnetic wave in free space is given by the.
[4x4=16] · (a) Scrotum · (b) Sex glands · (c) Fallopian tubes · (d) Seminiferous tubules. 7. What are Lymph Nodes? Discuss about the spleen with a neat structure.
4. (a) Use Warshall's algorithm to find the transitive closure of the relation [10+6] · R = {(1,2)(1,3)(1,4)(2,3)(2,4)(3,4)} · (b) Are the simple graphs with the following ...
(b) A carrier wave of frequency 100 MHz is frequency modulated by sine wave of · amplitude 20 volts and frequency 100 KHz. The frequency sensitivity of the · modulation is 25 KHz per volt. Determine the approximate bandwidth of FM · wave using Carson
(a) What is the difference between chipping and spalling? (b) Explain how tool life curves are established? (c) Discuss working principle of strain gauge ...
Explain the construction of elastic strain gauge? What are the problems associated · with the use of elastic resistance strain gauges how can you find such a ...
of 1 msec synchronizing pulses are applied to the device such that breakdown · voltage is lowered by 50 V at each pulse. The synchronizing pulse frequency.
1. (a) What are the main objectives of using a pattern in sand molding? [7+9] · (b) Explain the ... Explain the principle involved in resistance welding. What are the ...
the concept of Lubrication in Hot extrusion process ? [8+8]. 6. (a) Sketch and describe the construction and working of hydrostatic extrusion and mention some of ...
(a) Briefly explain about the optical fibre construction details and show a figure for · transmission of light rays and discuss about the refractive index distribution.
Sketch and describe the essential elements of a two lipped twist drill. Explain the · functions of all the important elements of a twist drill? [16] · 6. Write short notes ...
a flat plate of chord C = 2m ,and at an angle of attack α = 50 . Analyze the flow · field. Obtain lift, drag and pitching moments from Ackerets theory. Elaborate with.
1. Discuss in detail about the advantages of Robotics over other form of Automation ... Consider the three-link articulated robot of figure 5. Derive the forward ...
What is the theory of lubrication? Explain how surface tension plays a role in the · performance of lubricating oils and hydraulic fluids? What is surface tension ...
(b) Explain the basic principle of the instrument used for Condition monitoring · of any process. [8+8] · 2. (a) Compare and construct the functioning of rupture ...
of transition to be provided? (b) Explain the principles of interlocking. [8+8] · 8. (a) Explain briefly the different factors considered for selection of site of a railway.
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A silica brick layer on inside is laid to 150mm thickness and a · magnesia brick of 200mm thickness on outside. The inside and outside wall · surfaces are at 650 ...
(b) Write the principle of gas analysis by thermal conductivity. [8+8] · 5. What are the various designs of manometers used to measure pressure. [16] · 6. A tank of ...
