1. (a) What are the advantages of water jet machining?
[8+8]
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(b) Describe the practical applications of water jet machining.
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IV B.Tech I Semester Examinations,MAY 2011 UNCONVENTIONAL MACHINING PROCESSES Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
2. (a) Sketch and explain the internal finishing of surfaces by magnetic abrasive process? (b) Describe the effect of bonded and unbounded magnetic abrasive particles on the surface finish and material removal rate in MAF process? [16]
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3. (a) What are the various Etcharts used in chemical machining? Mention their characteristics?
(b) Describe the quality of machining and accuracies obtainable in chemical machining? [16]
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4. (a) Describe the construction and working of “Micro - Drilling” by LASER? (b) What is the need of doping of LASER and mention various doping materials and their relative advantages? [16] 5. Write short notes on:
(a) The effect of high temperature and pressure of electrolyte in the ECM process. (b) Applications of electrolytic grinding process.
[16]
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6. Discuss the model proposed by Shaw regarding the metal removal rate and obtain an expression for MRR. [16] 7. How the developments in the area of materials are partly responsible for evluation of advanced machining techniques? [16]
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8. (a) Describe about the importance of supply voltage, break down voltage, charging resistance, gap setting and die electric strength of gap in electro discharge machining. (b) Sketch the Rotary pulse generator used in EDM process and mention its advantages over Relaxation circuit. [16] ?????
1
Code No: 07A70301
R07
Set No. 4
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IV B.Tech I Semester Examinations,MAY 2011 UNCONVENTIONAL MACHINING PROCESSES Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
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1. (a) Discuss the nature of inaccuracies of machined surfaces obtained by EDM and WEDM processes and mention the methods of reducing their effects? (b) What is flushing and why is it required in EDM? [16]
2. (a) What is Etch factor and how can it be controlled in chemical machining? (b) What are the various process parameters to be considered to obtain higher MRR and quality of machined surface? [16]
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3. Describe the variables that affect the metal removal rate in Abrasive jet machining. [16]
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4. (a) What are the various dependent and independent variables which control the abrasive flow machining process? (b) How the restriction offered bypass way governs MRR and quality of surface produces in AFM? [8+8] 5. Explain the reasons that lead to the development of Unconventional machining processes. [16]
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6. (a) What are the various LASERS used in practice for machining and explain the requirements of “LASERS”? (b) Compare EBM and LBM on the following aspects: i. Machining rate ii. Tool wear rate iii. Accuracy. [16]
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7. Calculate the depth of indentation produced on a glass surface in ultrasonic machining by the throwing action of abrasive grain of 100 µm diameter. The following data are given. Amplitude of vibration = 0.1 mm, Frequency = 20 kc/s, Abrasive density = 3.0 kg/m3 , Yield strength of glass = 4.0 ×1011 N/m2 . Also outline a method by which the volume rate of material removal could be computed. [16]
8. Explain the following: (a) Economic aspects of ECM (b) Electro chemical deburring (c) Choice of electrolytes in ECM.
[16]
????? 2
Code No: 07A70301
R07
Set No. 1
in
IV B.Tech I Semester Examinations,MAY 2011 UNCONVENTIONAL MACHINING PROCESSES Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Explain the principle of operation of metal removal in electro discharge machining operation. [16]
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(b) What are the advantages and applications of EDM process?
2. (a) Discuss the basic principles of Electro chemical machining using a neat sketch. (b) What are the functions of the electrolyte used in Electro chemical machining? [10+6]
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3. Discuss the principle and operation of Abrasive jet machining process in detail. [16] 4. (a) What is chemical machining? How the material removal takes place in this process?
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(b) What are the various resists (mark ants) used in practice and mention their properties? [16] 5. Describe the technical and economical reasons why Unconventional machining processes are necessary. [16] 6. Describe the design procedure for the Horn (velocity transformer) used in ultrasonic machining process. [16] 7. (a) Differentiate between EBM and LBM considering atleast five aspects?
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(b) Compare the edge production in EBM and LBM. What are the factors influencing edge for maintain in both the processes? [16]
8. (a) Explain the advantages of dual gas and water injected plasma torch.
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(b) How the power supply and gas supply control the MRR and quality of the machined surfaces? [16] ?????
3
Code No: 07A70301
R07
Set No. 3
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IV B.Tech I Semester Examinations,MAY 2011 UNCONVENTIONAL MACHINING PROCESSES Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Define “ultrasonic” and describe the process in which these are used to machine the material. [16]
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2. (a) How does vacuum and heating of cathode help the performance of electron beam?
(b) Describe about “LASING” acting and mention industrial applications of LASER? [16]
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3. (a) Sketch and explain the mechanism of material removal in EDM?
(b) Describe with a neat sketch the electro mechanical servo control unit to maintain the correct gap in EDM? [16] 4. (a) What are the various sparks generating circuits used in practice and eplain their relative advantages?
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(b) Develop an expression for the MRR in EDM?
[8+8]
5. Enlist the requirements that demand the use of unconventional machining processes. [16] 6. Describe the effects of high temperature and pressure of electrolyte in ECM process. [16]
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7. Explain the affect of following parameters on the metal removal rate in AJM: (a) Velocity of fluid
(b) Design of nozzle (c) Gas pressure.
[16]
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8. (a) What are the advantages of water circulation in the torch of the PAM? (b) Why the surface finish and tolerance obtained are poor in plasma Arc machining? [16] ?????
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.
(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
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
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.
