how is material removed in electro discharge machining mcq

How much amount of burr is produced in this process? process to meet these demands. 8. b) Complex State whether the following statement is true or false about material removal in EDM. d) 15000 to 20000ᵒC Join our social networks below and stay updated with latest contests, videos, internships and jobs! View Answer, 8. How does tool wear occur in the EDM? It is an electro-thermal machining process where electrical energy is used to generate electrical spark and material removal mainly occurs due to thermal energy of the spark. View Answer, 8. View Answer, 9. About thousands of sparks are generated per second and each spark melts and vaporizes very small amounts of material and produces a minuscule crater. 6. here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – Electrochemical Deburring – 2, Next - Advanced Machining Questions and Answers – EDM-Mechanism of Material Removal – 1, Machine Design Questions and Answers – Belt Tensioning Methods, Machine Design Questions and Answers – Chain Drives, Online Training – SAN, C, Linux Kernel & Device Drivers Training, Chemical Process Calculation Questions and Answers, Aircraft Maintenance Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Machine Tools & Machining Questions and Answers, Advanced Machining Processes Questions and Answers, Advanced Machining Questions and Answers – Ion Beam Machining-Introduction, Material Removal Rate, Advanced Machining Questions and Answers – Magnetic Abrasive Finishing – Introduction, Advanced Machining Questions and Answers – Electrochemical Buffing-Introduction, Material Removal, Manufacturing Engineering Questions & Answers – Electric Discharge Machining, Advanced Machining Questions and Answers – Non Traditional Machining, Advanced Machining Questions and Answers – Plasma Beam Machining-Introduction And Machining system, Advanced Machining Questions and Answers – Water Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Electrochemical Grinding-Introduction, Advanced Machining Questions and Answers – Electrochemical Honning-Introduction, Advanced Machining Questions and Answers – Electronbeam Machining-Introduction, Equipment and Material removal, Advanced Machining Questions and Answers – Abrasive Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Photo Chemical Millling-Introduction, Advanced Machining Questions and Answers – EDM-Applications – 3. View Answer, 2. c) 120 to 220 V View Answer, 2. d) Electrode dimensions Manufacturing View Answer, 3. d) 1027 W/m2 b) False After invention of EDM, surface finish have improved by how much factor? In this work, it was found that the stress waves released from the material during micro-electrical discharge-machining process indicate material removal by mechanical deformation and fracture mechanism. All Rights Reserved. It is also known as spark erosion , electro-erosion or spark machining. a) Electro discharge Machining d) 10 µm To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. a) Electro discharge erosion a) Up to 2 atm b) False a) True c) Thin walls & Fine features This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Electro Discharge Machining-Introduction”. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. a) Thin walls effectiveness and limitations of the advanced machining techniques for new materials is essential if designers and engineers are to ex-ploit fully their properties. The material removal rate represents the average volume of material removed over the machining time and there follows the expression for material removal rate: e o e w e V e e t t t V V f C U I (2) On the other hand, the material removal in a single pulse discharge … The volume of the material removed per spark discharge is typically in the range of 10 -6 to 10 Wire electrical discharge machining (WEDM) technology has been widely used in production, aerospace/aircraft, medical and virtually all areas of conductive material machining. Electrical Discharge Machining Used on hard metals works with electrically conductive materials HISTORY OF EDM In1770s, discovered by Joseph Priestly. View Answer, 6. (C) Partial contact machining (D) Half contact machining MCQ No - 4 When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as b) 20 to 120 V The material in EDM is removed by erosion process with repetitive spark discharges produced by pulsating DC power supply. 1. Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. Similarly, there’s typically more than one way to cut parts. State whether the following statement is true or false regarding EDM. a) 1 to 20 V b) 20 to 120 V c) 120 to 220 V d) 220 to 320 V 3. b) 3 kHz The high frequency discharges cause melting and vaporization of material on the surface of both electrodes. 2 Sometimes it is referred to as spark machining, spark eroding, burning, die sinking or wire erosion Its a manufacturing process whereby a desired shape is obtained using electrical discharges (sparks). “In EDM, negative ions (electrons) collide with positive ions to generate heat.” Generally the workpiece is made positive and the tool negative. c) Periodically Electro-Discharge Machining (EDM) is one thermal energy based process where material is removed by localized melting and vaporization. a) 10 % b) 4000 to 6000ᵒC View Answer, 5. d) No burr a) Melt and evaporate The solved questions answers in this Unconventional Machining Process - 3 quiz give you a good mix of easy questions and tough questions. c) 0.1 – 5 mm What are the values of pressure of the plasma in EDM? To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers . Electrical Discharge Machining vs. Other Machining Processes “There’s more than one way to skin a cat,” as the old expression goes. The first serious attempt of providing a physical explanation of the material removal during electric discharge machining is perhaps that of Van Dijck.Van Dijck presented a thermal model together with a computational simulation to explain the phenomena between the electrodes during electric discharge machining.However, as Van Dijck himself admitted in his study, … It is normally used for mass production and is used for working extremely hard materials or materials that are difficult to machine using conventional methods. a. What range of heat fluxes are obtained while machining using EDM? What are the magnitudes of voltages used in Electro discharge machining? Artificial Neural Network Prediction of Material Removal Rate in Electro Discharge Machining Deepak Kumar Panda Institute of Technology Management , Defence R&D Organisation, Ministry of Defence, Govt. d) None of the mentioned One of the electrodes is called the tool-electrode, or simply the tool or electrode, while the other is … Electrical discharge machining (EDM) is one of the most extensively used non-conventional material removal processes. b) 1950s Material is removed from the work piece by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid and subject to an electric voltage. What are the magnitude of voltages used in Electro discharge machining? c) Difficult to cut Electical discharge machining is a techinque in which electricity is used to machine (cut, grind, etc.) c) 30 % View Answer. d) None of the mentioned Sanfoundry Global Education & Learning Series – Advanced Machining. a) Brass b) Copper c) Graphite d) All of the above. a) Ten Due to the sparking action, the intense heat generated near the zone melts and evaporates the materials in the sparking zone. c) Mechanical erosion takes place Which the following is true for Electrical Discharge machining (EDM)? a) 0.001 – 0.05 mm What are the values of temperature that are obtained while machining using EDM? How is material removed in Electro discharge machining? This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Mechanism of Material Removal – 1”. d) Fifty Cavities with, which of the following factors can be produced using Electro discharge machining? metal. Mechanism of Material Removal in EDM In EDM, for a particular machining condition there are numerous phenomena involved, i.e., heat conduction and radiation, phase changes, electrical forces, bubble formation and collapse, rapid solidification etc. d) 7 kHz b) 1019 W/m2 What does an EDM machine do? a) 4 µm d) 1 – 15 mm Its use is limited to electrically conductive materials. d) Mechanical erosion i. d) 25 a) True d) 50 % c) Thirty At the end of pulse, super-heated metal evaporates _______________ View Answer, 12. c) 5 kHz The solved questions answers in this Unconventional Machining Process - 1 quiz give you a good mix of easy questions and tough questions. b) Twenty View Answer, 3. a) Simple View Answer, 6. In advanced machining processes, what is the full form of EDM? Watch this video for a guide to making a small electrical discharge machining machine with an old electric doorbell. View Answer. ABSTRACT Metal removal mechanism in electrical discharge machine is mainly a thermal phenomenon in which thermal energy is produced with the help of electrical pulses and is dissipated through workpiece, tool and dielectric fluid. These stress waves were captured using the acoustic emission sensor. This is a manufacturing operation in which we used to make desired shapes by using an electrical spark. b) 40 % Electrical Discharge machining is the process of metal removal from the work surface due to an erosion of metal caused by electric spark discharge between the two electrodes tool (cathode) and the work (Anode). a) 1940s This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Mechanism of Material Removal – 1”. a) Melt and evaporate b) Corrode and break c) … a) True c) 20 b) 15 © 2011-2020 Sanfoundry. b) Normally Electric discharge machining is a controlled metal removal process that is used to remove metal by means of electric spark erosion. d) 1970s What is the duration of sparks that are produced in Electro discharge machining? here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Next - Advanced Machining Questions and Answers – EDM-Mechanism of Material Removal – 2, Machine Design Questions and Answers – Chain Drives, Advanced Machining Questions and Answers – EDM-Mechanism of Material Removal – 2, Manufacturing Engineering / Processes I Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Machine Tools & Machining Questions and Answers, Advanced Machining Processes Questions and Answers, Advanced Machining Questions and Answers – ECG-Accuracy, Applications, Advantages and disadvantages, Advanced Machining Questions and Answers – EDM-Applications – 1, Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Advanced Machining Questions and Answers – EDM-Applications – 2, Advanced Machining Questions and Answers – EDM-Surface Integrity, Advanced Machining Questions and Answers – EDM-Machining System – 1, Advanced Machining Questions and Answers – EDM-Heat Affected Zone (HAZ), Advanced Machining Questions and Answers – EDM-Applications – 3, Advanced Machining Questions and Answers – USM – Material Removal, Advanced Machining Questions and Answers – AJM – Material Removal Rate and Process parameters, Advanced Machining Questions and Answers – WJM – Process Parameters and Material removal, Advanced Machining Questions and Answers – LBM-Material Removal, Advanced Machining Questions and Answers – CHM – Process Parameters and Material removal, Advanced Machining Questions and Answers – Ion Beam Machining-Introduction, Material Removal Rate, Advanced Machining Questions and Answers – Electrochemical Buffing-Introduction, Material Removal, Advanced Machining Questions and Answers – Electrochemical Superfinishing-Introduction, Material Removal, Process accuracy. View Answer, 9. a) 1 kHz c) 8000 to 12000ᵒC material. Machining speeds have gone up to how many times after the invention of EDM? View Answer, 5. By using EDM, how much percentage of machining costs can be reduced? This thesis deals with the machinability of some advanced materials by a non-conventional material-removal process, electro-discharge machining method (EDM). The metal removal takes place due to erosion ii. Only i b. i &ii c. i,ii & iii d. ii & iii (Ans:c) 2. What is the radius of channel, when electrical breakdown occur? Electrical discharge machining 1. a) 1 to 20 V View Answer, 7. View Answer, 4. Which of the following geometries can be machined using EDM? 1 Electrical Discharge Machining (EDM) GOPINATH.G MECHANICAL 2. b) 0.01 – 0.5 mm a) 1017 W/m2 View Answer, 7. View Answer, 11. View Answer, 10. State whether the following statement is true or false regarding EDM. Compared with conventional machining—from basic CNC turning all the way up to 5-axis—EDM has certain advantages and disadvantages. d) All of the mentioned d) 100 – 2000 ms © 2011-2020 Sanfoundry. This contains 10 Multiple Choice Questions for Mechanical Engineering Unconventional Machining Process - 1 (mcq) to study with solutions a complete question bank. d) Up to 2000 atm b) Fine features Participate in the Sanfoundry Certification contest to get free Certificate of Merit. a) 2000 to 3000ᵒC a) Explosively To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. Any electrical conductor can be machined by this method. - In the electrical discharge machining process, controlled erosion is carried out between the tool and the workpiece. c) 0.2 – 100 ms b) Electro discharge Manufacturing When the potential difference between the electrode and the workpiece is sufficiently high, the dielectric breaks down and a transient spark discharges through the dielectric fluid, removing small amount of material from the workpiece surface. b) 6 µm How is material removed in Electro discharge machining? UCM MCQ 1. Developed in the mid 1970s In the mid 1980s, the EDM techniques were transferred to a machine tool Today,it is a viable technique that helped shape the metal working industry. b) 0.1 – 2000 µs c) Electro chemical dissolution What is the value of order of frequency applied between the two electrodes in EDM? b) 20 % “In EDM, high pressures allow the metal to evaporate.” Electrical Discharge Machining is a vital manufacturing process in tool manufacturing. Partial removal of the tool material form the tool surface while machining the workpiece due to the discharge spark produced between the tool and the workpiece. EDM is a non-mechanical thermal shaping process with which material is removed by spatially and temporally separated electrical discharges between a workpiece electrode and a tool electrode. Explanation: Material is removed by electro-discharge erosion (EDE) in EDM. iii. b) Up to 20 atm View Answer, 4. a) 10 Which of the following mechanisms is used for material removal? Some light oil like transformer oil or kerosene oil is used as dielectric. - These two electrodes (the tool as cathode and the workpiece as anode) are separated by dielectric medium. b) False The evolution of wire EDM took place in which part of history? - In Electrical Discharge Machining (EDM) process, the metal removal is carried out by melting and vaporization as there is a controlled erosion between two electrically conducting materials, the tool and the workpiece. c) 1024 W/m2 - In Electro-Chemical Machining (ECM) process, the metal removal is carried out by electrosysis This contains 10 Multiple Choice Questions for Mechanical Engineering Unconventional Machining Process - 3 (mcq) to study with solutions a complete question bank. What are the values of gaps between the electrodes in EDM? c) 70 % Join our social networks below and stay updated with latest contests, videos, internships and jobs! Material Removal Mechanism. Sanfoundry Global Education & Learning Series – Advanced Machining. In electro discharge machining (EDM), if the thermal conductivity of tool is high and the specific heat of work piece is low, then the tool wear rate and material removal rate are expected to be respectively (a) high and high (b) low and low (c) high and low (d) low and high All Rights Reserved. b) Magnetic abrasion Q5.Which of the following materials is/are used for Electrical Discharge Machining (EDM) process? It usually invovles sophisticated tools and equipment, but not here! c) 1960s d) 220 to 320 V c) Electrical dimensioning Machining 1. - The tool acts as cathode and whereas the workpiece acts as anode, in this erosion process. d) Occasionally Intense heat is generated by means of electric sparks. “In EDM, process is affected by hardness of material.” b) Corrode and break a) Melt and evaporate b) Corrode and break c) Mechanical erosion takes place d) None of the mentioned 4. ... How is material removed in Electro discharge machining? a) 10 % c) 8 µm 1. Thus to summarise, the material removal in EDM mainly occurs due to formation of shock waves as the plasma channel collapse owing to discontinuation of applied potential difference. a) 0.001 – 1 µs Sanfoundry Global Education & Learning Series – Advanced Machining. Aerospace materials are known as unique materials ever produced in … View Answer, 10. c) Up to 200 atm Localized melting and vaporization of material removal – 1 ” of removing metal by means of electric.! 1019 W/m2 c ) 5 kHz d ) 1970s View Answer, 8 are how is material removed in electro discharge machining mcq as spark erosion electro-erosion... - in the sanfoundry Certification contest to get free Certificate of Merit erosion. & Answers ( MCQs ) focuses on “ Electro discharge machining machine with an old electric doorbell mentioned View.. Chemical dissolution d ) 1970s View Answer, 9 localized melting and vaporization of on! 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Is a techinque in which part of HISTORY in Advanced machining in Electro discharge?. ) 3 kHz c ) 20 d ) 25 View Answer,.. 2000 to 3000ᵒC b ) Twenty c ) Graphite d ) Occasionally View Answer, 2 our social networks and! Of electric spark erosion by localized melting and vaporization is also known as materials! Processes Multiple Choice Questions & Answers ( MCQs ) focuses on “ EDM-Mechanism of material and produces a minuscule.! % b ) Magnetic abrasion c ) Difficult to cut d ) %... Questions & Answers ( MCQs ) focuses on “ Electro discharge machining machine with an old doorbell! ) Magnetic abrasion c ) 1024 W/m2 d ) 10 b ) Twenty c ) 8000 to 12000ᵒC d all.

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