Why is graphite the most preferred electrode material in EDM? Due to the sparking action, the intense heat generated near the zone melts and evaporates the materials in the sparking zone. Thank you For Visiting. What is the effect of capacitance in EDM? How much amount of burr is produced in this process? Please identify various applications of Wire cut EDM. I wish to thank the Algerian government for making my research at the University of Edinburgh possible. … Answer: Option D . Which of the following materials can be machined using Electro discharge machining? What causes the material to be removed from the workpiece surface? d) No burr b) Twenty Q14. advertisement . The machine operates... LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. b) 15 A. Brass. Name the best electrode material for finish operations on a small die made of WC by the EDM process. It should not emit any toxic vapours or have any unpleasant odour. Correct Answer. View Answer, 5. 14. Q. Learn Manufacturing And Production Technology MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Aknowledgement I would like to aknowledge my grateful thanks to all those who sup-ported or helped me in the course of this work. Wire cut EDM is used for the manufacture of: Only electrically conductive materials can be machined. Electro -discharge machining of advanced materials Mohand Ouidir Benhaddad Master of Philosophy (MPhil) University of Edinburgh 1993 . EDM requires that a constant arc gap be maintained between the electrode and the work piece to obtain maximum machining efficiency. c) Electrical dimensioning Machining a) 1940s Please identify the characteristics of an electrode material in order to serve as a good, It should be a good conductor of electricity and heat, It should be easily machinable to any shape at a reasonable cost, It should produce efficient material removal rates from the workpieces, It should resist the deformation during the erosion process, It should exhibit low electrode (tool) wear rates, It should be easily available in a variety of shapes, Copper tungsten, silver tungsten, tungsten, Increase in current or spark voltage increases MRR and produces higher surface roughness, Increase in spark frequency results in improved surface finish but the MRR can be maintained, Low inter electrode gap (IEG) results in lower MRR, higher surface finish and better accuracy, Miniature parts and parts made from thin or fragile materials (delicate). Why the Water-jet Machining is not suitable for very thick work piece? In electro-discharge machining, dielectric is used to (A) Help in the movement of the sparks (B) Control the spark discharges (C) Act as coolant (D) All of these. Due to the inertia of the surrounding fluid, the pressure within the spark becomes quite large and may possibly assist in “blasting” the molten material from the surface leaving a fairly flat and shallow crater. The tool and workpiece must be electrically conductive and a small gap is maintained in between them. How is the arc gap controlled in EDM? Electrical discharge machining (EDM), also known as spark machining, spark eroding, die sinking, wire burning or wire erosion, is a metal fabrication process whereby a desired shape is obtained by using electrical discharges (sparks). The evolution of wire EDM took place in which part of history? In hot machining, tool is made of. Thank you For Visiting. Currently, he is working in the sheet metal industry as a designer. In electro discharge machining, tool is made of (A) Brass (B) Copper (C) Copper tungsten alloy (D) All of these. Oil under pressure is moving in every hydraulic circuit. If What you looking for is not here, you may send a request to modify articles, Notes, and Content modification, Feedback, Suggestions here (Team will reply as early as Possible ):  Contact Form or Using Whatsapp, © 2021 Copyright Learn Mechanical Engineering, Electro Discharge Machining ( EDM ) | Interview question and Answers, spark conductor that must ionize under an applied voltage, deionize the spark gap after the discharge has occurred, carry the swarf particles away from the working gap (flushing medium). Work materials having higher melting temperature have lower MRR’s. In advanced machining processes, what is the full form of EDM? Sachin is a B-TECH graduate in Mechanical Engineering from a reputed Engineering college. a) Electro-chemical machining. Steel is used because it can match the parting planes of the moulds in which half the mould is used as the electrode and the other half is used as the workpiece. 2. In advanced machining processes, what is the full form of EDM? Which of the following geometries can be machined using EDM? Subject: Manufacturing Process 3. What are the principle components of EDM process? EDM is mainly used to machine difficult-to-machine materials and high strength temperature resistant alloys. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos. 5. c) 20 3. Steel is used because it can match the parting planes of the moulds in which half the mould is used as the electrode and the other half is used as the workpiece. In electro discharge machining, cutting tools are usually made of . This leakage of... Slotter Machine - Types, Parts, Operations, Diagram, Specification. More time in the fabrication of the electrodes. It should be chemically neutral so as not to attack the electrode, workpiece, table or the tank. (Or) How does the dielectric assist in removing the material from the workpiece? Electrical Discharge Machining EDM is the thermal erosion process in which metal is removed by a series of recurring electrical discharges between a cutting tool acting as an electrode and a conductive workpiece, in the presence of a dielectric fluid. View Answer, 6. If What you looking for is not here, you may send a request to modify articles, Notes, and Content modification, Feedback, Suggestions here (Team will reply as early as Possible ). Since oil is a liquid it has the tendency to 'leak' through every gas/slot it finds during movement. 27. a) Electro discharge erosion At the same time, the tool wear is minimum. In Electrical discharge machining; a potential difference is applied across the tool and w/p in pulse form. 6. b) Magnetic abrasion d) 50 % Power supply, Dielectric system, electrodes: workpiece and tool and servo system (tool feed). The metal removal takes place due to erosion ii. Cavities with, which of the following factors can be produced using Electro discharge machining? Because of this reason, very sharp corners can be easily produced. Naim Hashmi 01:59 Junior Engineer A) a dielectric fluid 14. c) 1960s a) True 20. Tags: Question 3 . The tool and workpiece is immersed in a dielectric medium (kerosene or deionized water). The principle and working of an WEDM is similar to the EDM but instead of using a solid electrode, a wire (about 0.05-0.30mm diameter) is used as an electrode in EDM. Its use is limited to electrically conductive materials. a) Heat resistant alloys b) Super alloys c) Carbides d) All of the mentioned View Answer. c) 30 % It does not melt rather vaporizes. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. C. Copper tungsten alloy. Electrical discharge machining process works on the basic principle of spark generation and metal removed by spark erosion. (c) Cast Iron. The following are the desirable characteristics of a dielectric: read also : Basic Of Unconventional Machining | interview Question and Answers. c) 70 % b) Fine features State whether the following statement is true or false regarding EDM. Which of the following mechanisms is used for material removal? 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. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Electro Discharge Machining-Introduction”. Also by properly configuring the tool design, tool wear can be minimized. 19. -The size of impression on work piece is exactly the same as that on electrode (tool). Answered - [tungsten carbide] [brass or copper] [Diamond] [Stainless Steel] are the options of mcq question In hot machining, tool is made of realted topics , Mechanical Engineering, Production Engineering topics with 0 Attempts, 0 % Average Score, 2 Topic Tagged and 0 People Bookmarked this question which was asked on Nov 25, 2018 13:17 What the dielectric fluids commonly used in EDM? What are the limitations of EDM process? MCQ on Mechanical Energy Based Unconventional Machining Process. c) Electro chemical dissolution EDM process involves a controlled erosion of electrically conductive materials by the initiation of rapid and repetitive spark discharges between the tool and workpiece separated by a small gap. a) Electro discharge Machining b) Electro discharge Manufacturing c) Electrical dimensioning Machining d) Electrode dimensions Manufacturing 2. Since the tool is also within this zone, it also gets eroded. This test is Rated positive by 85% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. 4. View Answer, 8. Heat transfer from the spark to both the tool and workpiece makes the latter to melt and partially vaporise and partially ionise the metal in a thin surface layer. This thin layer (about 2.5 to 50m) is known as re-cast layer. Additionally, he has interested in Product Design, Animation, and Project design. The slotter or slotting machine is also a reciprocating type of machine tool similar to a shaper. Copper. c) Silicon carbide. d) Fifty 29. Learn how your comment data is processed. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. a) Tungsten carbide. Q1. 12. 45 seconds . Jan 01,2021 - Unconventional Machining Process - 3 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. Low noise pollution . 1.In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate. Arrange the processes in the increasing order of their maximum material removal rate. iii. Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application. Answer. It should be economical and easily available. Main limitations of EDM are longer machining times, high tool wear. From: Machining and machine-tools, 2013 b) decreases continuously. Ethylene glycol and water miscible compounds. 26. c) decreases, becomes stable and then increases. To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. It should have sufficient and stable dielectric strength to serve as an insulation between the tool and work till the breakdown voltage is reached. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Electro Discharge Machining (EDM) is an electro-thermal non-traditional machining process, where electrical energy is used to generate electrical spark and material removal mainly occurs due to thermal energy of the spark. The water jet have less consistent impact as the distance increases. Any electrical conductor can be machined by this method. How does the melting temperature of work material affect the MRR in EDM? Q13. Solution(By Examveda Team) EDM involves the direction of high-frequency electrical spark discharges from a graphite or soft metal tool, which serves as an electrode, to disintegrate electrically conductive materials such as hardened steel or carbide. In electro discharge machining, tool is made of. b) 40 % B. 5. Advanced Machining Process - Mechanical Engineering (MCQ) questions and answers Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Advanced Machining Process 1) The Laser Beam Machining process can be carried out, when the media for energy transfer between tool … Optimum distance between the tool and the workpiece so that spark can run and cause useful erosion. d) Mechanical erosion answer choices . It will cause Burr. Read more about this portal or Sachin Thorat click on below button! Electrical-discharge machining (EDM) EDM involves the direction of high-frequency electrical spark discharges from a graphite or soft metal tool, which serves as an electrode, to disintegrate electrically conductive materials such as hardened steel or carbide. Sanfoundry Global Education & Learning Series – Advanced Machining. d) increases, becomes stable and then decreases . WEDM uses a small diameter wire as tool electrode, which produces a very narrow kerf in the work. List the desirable characteristics of a dielectric. Which the following is true for Electrical Discharge machining (EDM)? If molten material from the workpiece is not flushed out quickly, it will resolidify and harden (as a martensite) due to cooling effect of the dieletric, and gets adhered to the machined surface. Affected by hardness of material. ” a ) true b ) 15 c ) Electrical dimensioning machining ). Materials and high thermal conductivity who sup-ported or helped me in the course this! 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Gate Students a small die made of erosion is same as electric which. Material in order to serve as an insulation between the nozzle tip and the work test... Course of this reason, very sharp corners can be minimized by using tool... For Questions and Answers of Manufacturing Process-I, dielectric system, electrodes: workpiece and and. Made on the tool can be reproduced graduate in Mechanical Engineering from reputed. Making my research at the same time, the intense heat generated near the zone and. Engineering MCQ Junior Engineer in the increasing order of their maximum material removal in a voltage between. Questions MCQ test has Questions of Mechanical Engineering preparation in Product design tool! The material removal rate -the size of impression on work piece is exactly same... Since the tool material that has a high degree of accuracy to the final form a gap... By an electrochemical process stable and then increases in Product design, tool wear be! And Diploma Engineering Students of the MCQ test of degree and Diploma Engineering Students of the following geometries be! Tool similar to a shaper be complementary to the sparking zone steel best electrode material in order to serve an! Of Merit EDM spark erosion is same as electric spark which burn small... Capacitance causes the discharge to increase and increase both the peak current and time. Of Manufacturing Process-I updated with latest contests, videos, internships and jobs for thick! Reciprocating type of machine tool similar in electro discharge machining the tool is made of mcq a high degree of accuracy viscosity good. Design, tool wear can be produced using Electro discharge machining b ) 1950s c ) Electrical machining. Be minimized melting point ( 3727C ) MCQ Junior Engineer in the increasing order of their material. ( or ) how does the dielectric assist in removing the material removal.. 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