1. (a) Explain the Fourier’s law of thermal conductivity.
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II B.Tech I Semester Supplementary Examinations, November 2006 FURNACE TECHNOLOGY AND PYROMETRY (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
(b) Derive an expression for conduction through a homogeneous plane wall.[8+8] 2. Explain the following:
(b) Nusselt number (c) log mean temperature differene.
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(a) Reynolds number
(d) importance of heat transfer in furnace technology.
[4x4=16]
3. (a) Expain the concept of black body.
(b) Derive an expression for heat exchange by radiation between large parallel plates of different emissivity. [7+9]
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4. (a) Derive the relation for the rate of heat transfer due to combined effect of conduction and convection between two fluids separated by a cylindrical wall. (b) Compare radiation with conduction and convection.
[8+8]
5. (a) Discuss the salient features of reverberatory furnace and vertical shaft furnace. (b) What are the possible sources of heat losses in furnaces? Explain.
[9+7]
6. (a) Explain the principle and working of ‘direct arc’ and ’indirect arc’ electrical furnaces.
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(b) Explain the advantages of using electric energy as a source of heat in Metallurgical furnaces. [10+6]
7. (a) What is a Thermo-couple? Explain it’s working principle. (b) Discuss various methods of cold Junction correction in case of thermo electric pyrometers.
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(c) Explain Peltier and Thomson effects.
[5+6+5]
8. (a) Explain the principle and working of a total radiation pyrometer. (b) What are the various newer methods of measuring temperature that are available? Explain them. [8+8] ?????
NR211802 II B.Tech I Semester Supplementary Examinations ...
2. Explain the following: · (a) Reynolds number · (b) Nusselt number · (c) log mean temperature differene. (d) importance of heat transfer in furnace technology.
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) 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 ...
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) What is the purpose of providing âbondsâ in brick work. With the help of · neat sketches illustrate âEnglish bondâ. [8+8] · 2. (a) What is a âdamp-proof courseâ?
(b) The following observations are related to a closed compass traverse ABCD. Find out the stations which suffer local attraction and give the values of the.
NR. (b) Calculate the density of naphthalene decahydride (C10H18) from its refractive index value of 1.4804 at 18 oC. [10+6] · 8. (a) Explain how the depression ...
diagrams. Show that the entropy change during the cycle is zero ... if the small amounts of argon and carbon oxide present in the mixture are · neglected.
(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.
(a) Job order production and batch production system. (b) Mass production and flow production. [4+4+4+4] · 7. DefineâCritical pathâ, âslack timeâand âDummy ...
(b) One bag contains 4 White balls and 3 black balls and a second bag contains 3 ... [8+8] · 3. (a) The amount of bread ( in hundreds of pounds) X that a certain ...
(c) Explain sign conventions of heat and work in thermodynamics. [5+5+6] · 3. (a) State and explain second law of thermodynamics. (b) Define and explain ...
b=4.318 cm is fed by a 4 GHz carrier from a coaxial cable. Determine if a · TE10 mode will be propagated. If so calculate the phase velocity and group · velocity.
(c) An amplifier with voltage gain of 60 decibels uses 0.05 of its output voltage in · negative feedback. Calculate the gain of the feedback amplifier. [6+6+4].
Determine the length of the wire needed if the diameter · of the wire is 0.25 mm. Assuming that the temperature coefficient of resis- · tance of the wire is constant, ...
(b) Draw the block schematic of 4x1 MUX and give its truth table. [6] · 6. (a) Design a full adder with minimum number of NAND gates. [8] · (b) Draw the logic ...
8. (a) Enumerate various mechanical and diffusion properties of cartilage with ex- · amples? [8] · (b) Write briefly about âlubricationâ of joints? [8] · *****. 1 of 1.
Black body and Grey body. iii) · Reynolds number and Nusselts Number. 4.a) Derive Reciprocity theorem when the heat exchange is taking place between the.
Polynomials in single variable are stored in the form of linked lists. Each · structure has space for one coefficient and one exponent and a link. Assume.
armature and field resistances are 0.03 ohm. And 60 ohm ... 6.a) Explain with the help of diagrams how a rotating magnetic field is produced in · the air gap of a ...
(figure.1). (c) Obtain Thevenin's equivalent circuit for the network below figure 2. 1 of 3 ... (a) Obtain open circuit and short circuit parameters. Obtain relation ...
Show the reaction mechanisms of the following reactions. (a) Gatterman reaction. ... How will you determine the configuration of glucose with the help of Fischer's method? 7. (a) What ... Explain the theory of colour and constitution? *****. 1 of 1.
Maximize the following problem using Simplex Method. Z = 10x + y + ... 10; x1, x2 ⥠0. 8. Write short notes on the following: (a) Kuhn-Rucker conditions. 1 of 2 ...
