In advanced machining processes, what is the full form of EDM? Electro-Discharge Machining (EDM) is one thermal energy based process where material is removed by localized melting and vaporization. (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 How is material removed in Electro discharge machining? View Answer, 12. - 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) 70 % State whether the following statement is true or false about material removal in EDM. Which of the following geometries can be machined using EDM? b) False View Answer, 10. 1 Electrical Discharge Machining (EDM) GOPINATH.G MECHANICAL 2. b) 40 % This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Electro Discharge Machining-Introduction”. c) 5 kHz process to meet these demands. b) 6 µm Machining speeds have gone up to how many times after the invention of EDM? b) 15 8. Electrical Discharge Machining Used on hard metals works with electrically conductive materials HISTORY OF EDM In1770s, discovered by Joseph Priestly. b) 0.01 – 0.5 mm a) Melt and evaporate b) Corrode and break c) Mechanical erosion takes place d) None of the mentioned 4. What are the magnitudes of voltages used in Electro discharge machining? These stress waves were captured using the acoustic emission sensor. c) 120 to 220 V This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Mechanism of Material Removal – 1”. - These two electrodes (the tool as cathode and the workpiece as anode) are separated by dielectric medium. View Answer. © 2011-2020 Sanfoundry. Similarly, there’s typically more than one way to cut parts. b) 0.1 – 2000 µs a) Electro discharge erosion c) 0.2 – 100 ms What is the duration of sparks that are produced in Electro discharge machining? a) 1 kHz a) 1940s Intense heat is generated by means of electric sparks. c) Thin walls & Fine features b) Electro discharge Manufacturing Join our social networks below and stay updated with latest contests, videos, internships and jobs! 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. c) 1960s c) 0.1 – 5 mm b) False c) 30 % b) 20 to 120 V What does an EDM machine do? c) Electro chemical dissolution About thousands of sparks are generated per second and each spark melts and vaporizes very small amounts of material and produces a minuscule crater. d) Mechanical erosion What are the values of temperature that are obtained while machining using EDM? Electrical discharge machining 1. The metal removal takes place due to erosion ii. b) False This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Mechanism of Material Removal – 1”. What is the radius of channel, when electrical breakdown occur? The high frequency discharges cause melting and vaporization of material on the surface of both electrodes. “In EDM, negative ions (electrons) collide with positive ions to generate heat.” View Answer, 4. Wire electrical discharge machining (WEDM) technology has been widely used in production, aerospace/aircraft, medical and virtually all areas of conductive material machining. Some light oil like transformer oil or kerosene oil is used as dielectric. d) All of the mentioned d) 15000 to 20000ᵒC What are the values of gaps between the electrodes in EDM? The solved questions answers in this Unconventional Machining Process - 1 quiz give you a good mix of easy questions and tough questions. c) 8 µm Aerospace materials are known as unique materials ever produced in … Electrical Discharge Machining is a vital manufacturing process in tool manufacturing. By using EDM, how much percentage of machining costs can be reduced? a) Up to 2 atm d) 1 – 15 mm Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. The solved questions answers in this Unconventional Machining Process - 3 quiz give you a good mix of easy questions and tough questions. 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. View Answer. View Answer, 3. a) 1017 W/m2 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. c) 1024 W/m2 This contains 10 Multiple Choice Questions for Mechanical Engineering Unconventional Machining Process - 3 (mcq) to study with solutions a complete question bank. d) 7 kHz Watch this video for a guide to making a small electrical discharge machining machine with an old electric doorbell. One of the electrodes is called the tool-electrode, or simply the tool or electrode, while the other is … d) 25 Sanfoundry Global Education & Learning Series – Advanced Machining. View Answer, 3. 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.