2mark With Answer UCM M.E 6004 PDF
2mark With Answer UCM M.E 6004 PDF
2mark With Answer UCM M.E 6004 PDF
UNIT – I : INTRODUCTION
PART - A (2 Marks)
12. What type of energy source is applied in the ion beam machining process?
Ionised substance is used as energy source in ion beam machining process.
1. Write down the energy transfer media, energy source and mechanism of metal removal for the
nontraditional machining processes. (16 marks) (May/June-2006)
3. What are the various aspects to be considered while selecting a UCM process?
(16 marks) (May/June-2007)
5. Classify unconventional machining processes based on basic mechanism involved in the process,
sources of energy required for material removal, medium of transfer of energies and type of energy
required to shape the materials. (16 marks) (Apr/May-2008)
7. What is the need for development of unconventional machining processes? Explain with
examples. (16 marks) (May/June-2007)
9. How will you analyze the applicability of different processes to different types of materials, namely
Metals, alloys and non-metals? Present in the form of table.
(16 marks) (May/June-2009)
10. Compare the process capabilities and
limitations of electrical energy based and mechanical energy based unconventional processes.
(16 marks) (May/June-2012)
UNIT – II : MECHANICAL ENERGY BASED PROCESSES
PART – A (2Marks)
(Nov/Dec-2004)
1. What are the desirable properties of carrier gas in AJM?
2. What are the Process parameters affecting the MRR in AJM? (May/June-2006)
The Process parameters affecting the MRR in AJM are
1. Gas pressure.
2. Velocity of particles.
3. Abrasive mass flow rate.
4. Mixing ratio.
5. Nozzle tip distance
4. ist down any four variables in AJM that influence the MRR? (Nov/Dec-2006)
The four variables in AJM that influence the material removal rate are
1. Gas Pressure.
2. Velocity of Particles.
3. Abrasive mass flow rate.
4. Mixing ratio.
5. What are the characteristics of carrier fluid? (Nov/Dec-2008)
The characteristics of carrier fluid are
1. good wetting characteristic
2. High thermal conductivity
3. Non-toxic and non-corrosive.
4. Should have low viscosity.
1. Describe the principle and equipment for AJM. Explain the process parameters which control
the AJM machining quality. (16 marks) (May/June-2007)
2. Explain the working principle and equipment’s of Ultra Sonic Machining with neat sketch. Mention
its applications, advantages and limitations. (16 marks) (Nov/Dec-2007)
4. Compare the USM, WJM and AJM in terms of process capabilities and limitations.
(16 marks) (May/June-2007)
8. Briefly explain the effect of operating parameters on material removal rate. List the
applications of USM. (8 marks) (Apr/May-2005)
9. Discuss the effects of the following parameters on the MRR and surface finish in USM.
a) Amplitude and frequency.
b) Abrasive size.
c) Concentration of abrasives.
d) Material hardness. (16 marks) (Nov/Dec-2006)
10. Describe the principle and equipment for WJM. Explain the different applications and process
control features of WJM. (16 marks) (Nov/Dec-2008)
UNIT – III : ELECTRICAL ENERGY BASED PROCESSES
PART – A (2 Marks)
9. Mention a few varieties of power supply circuits commonly used in EDM. (N/D-2008)
1. R-Circuit.
2. Rotary impulse generator.
3. Controlled pulse (vacuum tube).
4. Oscillator controlled pulse.
5. Transisterpulsed circuit.
10. What are the prime requirements of tool material in EDM? (N/D-2004)
The prime requirements of tool material in EDM are
1. It should be electrically conductive.
2. It should have good mach inability.
3. It should have low erosion rate.
4. It should have low electrical resistance.
18. What are the materials that cannot be used for machining in EDM?
Non conducting materials
1. Explain the EDM process and list its advantages, disadvantages and applications.
(16 marks) (N/D-2008)
2. Explain the Wire cut EDM and list its advantages, disadvantages and applications.
(16 marks) (A/M-2010)
3. Explain the process parameters which govern the EDM/ Wire EDM process.
(16 marks) (N/D-2008)
5. Write about various types of flushing techniques used in EDM. (8marks) (A/M-2010)
6. State the recent developments in EDM and Wire cut EDM. (8 marks) (A/M-2008)
7. How will you carry out the analysis for optimization of metal removal rate in EDM process?
8. What are the steps that are to be adopted in sequence while applying the linear programming
technique to optimize the metal removal rate in EDM?
(16 marks) (N/D -2009)
9. Explain how the stratified wire works. Also discuss about the recent developments in wire EDM.
(8 marks) (A/M - 2006)
10. Explain the classification and characteristics of various spark erosion generators.
(16 marks) (N/D - 2006)
UNIT – IV : CHEMICAL AND ELECTRO CHEMICAL ENERGY BASED PROCESSES
PART – A (2 Marks)
1. What are the materials used to make the tool electrode in ECM? (A/M-2005)
Copper and copper alloys, titanium, aluminum, brass, bronze, carbon, Monel and reinforced
plastic.
2. What are the main functions of electrolysis in the ECM? (M/J-2006 & N/D-2006)
The main function of electrolysis in ECM is to complete the electric circuit between the tool
and the work piece and to allow the reaction to proceed efficiently. Apart from this the other
functions are:-
1. To remove the products of machining from the cutting region.
2. To carry away the heat generated during the chemical reaction.
3. To avoid ion concentration at the work piece- tool gap.
3. What are the properties that are expected from the electrolysis used in the ECM? (N/D-2007)
The properties that are expected from the electrolysis used in ECM are
1. High thermal conductivity.
2. Low viscosity and high specific heat.
3. Should chemically stable even at high temperature.
4. Should be non-toxic and non-corrosive.
10. What are the important functions of abrasive particles used in ECG? (N/D-2006)
It acts as insulator to maintain a small gap between the wheel and work piece. They are
electrolysis products from the working area. To cut chips if the wheel should contact the
work piece particularly in the event of power failure.
15. What are the materials used to make the tool electrode in ECM? (A/M-2005)
Copper and copper alloys, titanium, aluminum, brass, bronze, carbon, Monel and reinforced plastic.
Sharp internal corners cannot be obtained and Post machining cleaning is needed.
4. List out the advantage of EGC over conventional grinding. (8 marks) (N/D -2009)
7. Explain the principle of working, equipment’s, Applications, Advantages and drawbacks of chemical
machining. (16 marks) (N/D 2012)
10. Briefly discuss about the effect of high temp and pressure of electrolyte on the ECM
process. (16 marks) (N/D-2005)
11. Describe the working principle and elements of chemical machining. What are the factors
on which the selection of a resist for use in chemical machining? (16 marks) (M/J -2005)
12. What are the specific advantages of using chemical machining over electro chemical
machining? Give some of the practical applications of chemical machining process
(16 marks) (M/J-2008)
13. Explain in detail the ECM process with neat sketch and also mention the advantages and
applications. (16 marks) (N/D - 2006)
UNIT – V : THERMAL ENERGY BASED PROCESSES
PART – A (2 Marks)
5. Why is the deflection coil provided for electron beam machining? (A/M-2005)
The functions of the deflection coil us to direct and focus the electron beam to the
machining zone.
6.What is the principle of LBM? (N/D-2005)
In laser beam machining the powerful, monochromatic, collimated laser beam is focused on
the work piece by focusing lens to melt and vaporize the work material
17. What are the two methods of focusing the electron beam?
Electromagnetic focusing and Electrostatic focusing
1. Why is Electron Beam Machining carried out in vacuum? Explain the process with neat sketch.
(16 marks) (A/M-2010)
2. Describe PAM process with neat sketch and write about its process parameters, advantage and
applications. (16 marks) (A/M-2010)
3. Draw the schematic set-up of PAM. Indicate various parts. (16 marks) (M/J-2009)
4. Explain the process of LBM and PAM with a neat sketch. (16marks) (A/M-2004)
5. Discuss the process parameters of EBM and their influence on machining quality.
(16marks) (A/M-2005)
7. List out the advantage and limitation of LBM process. (8marks) (A/M-2006)
8. List out the advantage and limitation of PAM process. (8marks) (N/D-2010)
10. Explain the principles and elements of EBM, also how the work table is protected from
getting damaged by electron beam. (16 marks) (N/D-2004)
11. Describe Discuss how the process variables influence MRR, HAZ and pattern generation.
(16 marks) (N/D-2009)
12. What are the specific advantages of using chemical machining over electro chemical
machining? Give some of the practical applications of chemical machining process