Additionally, he has interested in Product Design, Animation, and Project design. a) Electro discharge Machining Manufacturing And Production Technology MCQ question is the important chapter for a Mechanical Engineering and GATE students. Learn how your comment data is processed. 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. This discharge occurs in a voltage gap between the electrode and workpiece. Arrange the processes in the increasing order of their maximum material removal rate. a) 10 % View Answer, 6. T… a) Electro discharge Machining b) Electro discharge Manufacturing c) Electrical dimensioning Machining d) Electrode dimensions Manufacturing 2. © 2011-2021 Sanfoundry. In Electrical discharge machining; a potential difference is applied across the tool and w/p in pulse form. d) increases, becomes stable and then decreases . 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. c) Thin walls & Fine features In electro discharge machining, cutting tools are usually made of . Which of the following materials can be machined using Electro discharge machining? Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application. It should maintain its properties over a wide range of temperature, contamination by debris and products of decomposition. 13. 10. Which of the following geometries can be machined using EDM? 12. No tool wear. b) 1950s 19. Work materials having higher melting temperature have lower MRR’s. a) Simple It should deionise rapidly after the spark discharge has taken place. a) 1940s From: Machining and machine-tools, 2013 To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. link to Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application, link to Slotter Machine - Types, Parts, Operations, Diagram, Specification. EDM is mainly used to machine difficult-to-machine materials and high strength temperature resistant alloys. 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. Why the Water-jet Machining is not suitable for very thick work piece? How much amount of burr is produced in this process? The water jet have less consistent impact as the distance increases. What is the use of dielectric in EDM process? The spark generated by this process produces heat, which remove metal by erosion and evaporation. View Answer. Subject: Manufacturing Process 3. Required fields are marked *. Some light oil like transformer oil or kerosene oil is used as dielectric. In Electro-Discharge Machining (EDM), the tool is made of. -Gap between tool and work piece is controlled by servo mechanism. More time in the fabrication of the electrodes. d) Fifty Q13. It may be considered as a vertical shaper. -The size of impression on work piece is exactly the same as that on electrode (tool). View Answer, 9. Answer. Q. The tool and workpiece is immersed in a dielectric medium (kerosene or deionized water). View Answer, 2. In Electro- Discharge Machining (EDM), the tool is made of a) Copper b) High speed steel c) Cast iron d) Plain carbon steel. d) All of the mentioned Q1. b) Electro discharge Manufacturing Introduction to Slotting Machine : advertisement . a) True What are the limitations of EDM process? d) None of these . a) Electro discharge erosion Best electrode material for finish machining a small die made of WC – steel. Any complicated shapes made on the tool can be reproduced. “In EDM, process is affected by hardness of material.” Advantages of Electrical Discharge Machining: Here are some advantages of Electro discharge machining: It can be used for any hard material and even in the heat-treated condition. Read more about this portal or Sachin Thorat click on below button! c) 20 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 ). c) Difficult to cut This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Electro Discharge Machining-Introduction”. View Answer, 7. 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. c) Thirty 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. Assertion (A): In ECM, the shape of the cavity is the .mirror image of the tool, but unlike EDM, the tool wear in ECM is less. MCQ on Mechanical Energy Based Unconventional Machining Process. 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). 26. What the dielectric fluids commonly used in EDM? Ethylene glycol and water miscible compounds. Why is a servo-controlled system required in EDM? 27. It is the ratio of volume of work removed to the volume of tool removed. 1. b) 40 % b) 15 b) Electro-discharge machining. The metal removal takes place due to erosion ii. D. All of these . a) Aluminum oxide. Low noise pollution . 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. Sachin is a B-TECH graduate in Mechanical Engineering from a reputed Engineering college. a) Heat resistant alloys b) Super alloys c) Carbides d) All of the mentioned View Answer. Optimum distance between the tool and the workpiece so that spark can run and cause useful erosion. The evolution of wire EDM took place in which part of history? 19. 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. It should have low viscosity and good wetting capacity to provide an effective cooling mechanism and remove the swarf particles from. 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. 6. b) decreases continuously. 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). 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 Explanation: Electro discharge machining is used to machine complex shapes to a high degree of accuracy. How is the arc gap controlled in EDM? What are the various applications of EDM? answer choices . Naim Hashmi 01:59 Junior Engineer A) a dielectric fluid (b) High Speed Steel. The work piece will over heat and melt. Explain why tool shape in the EDM process should be complementary to the final form? Electrical discharge machining process works on the basic principle of spark generation and metal removed by spark erosion. Comparatively low cost in machine set up ... Electro-discharge Machining. 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. Since the tool is also within this zone, it also gets eroded. 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. It does not melt rather vaporizes. What are the design factors to be considered while selecting the machine tool? Electrochemical Machining (ECM) Ultrasonic Machining (USM) Electron Beam Machining (EBM) Laser Beam Machining (LBM) and Electric Discharge Machining (EDM) (a) USM, LBM, EBM, EDM, ECM (b) EBM, LBM, USM, ECM, EDM (c) LBM, EBM, USM, ECM, … 11. a. At the same time, the tool wear is minimum. d) 25 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. Laser-assisted electric discharge machining is a hybrid process of combining both laser beam machining (LBM) and electro-discharge machining (EDM) in order to address the problems associated with the both EDM and laser. Please identify various applications of Wire cut EDM. The tool and workpiece must be electrically conductive and a small gap is maintained in between them. d) 1970s www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. Which of the following mechanisms is used for material removal? View Answer, 8. The slotter or slotting machine is also a reciprocating type of machine tool similar to a shaper. c) Silicon carbide. 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. Increasing the capacitance causes the discharge to increase and increase both the peak current and discharge time. State whether the following statement is true or false regarding EDM. Thank you For Visiting. What is the effect of capacitance in EDM? b) 20 % 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). b) Magnetic abrasion c) 30 % It should not emit any toxic vapours or have any unpleasant odour. b) Fine features Here the tool is negative and w/p is positive. The following are the desirable characteristics of a dielectric: read also : Basic Of Unconventional Machining | interview Question and Answers. Option (a) is correct. 2. A. Introduction to Seals : Correct Answer. 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. Electro -discharge machining of advanced materials Mohand Ouidir Benhaddad Master of Philosophy (MPhil) University of Edinburgh 1993 . Because of this reason, very sharp corners can be easily produced. SURVEY . What are the different types of the electrical circuits that are used for electro spark machining? High accuracy of about 0.005 mm can be achieved. 22. 18. … Due to the sparking action, the intense heat generated near the zone melts and evaporates the materials in the sparking zone. 21. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) a) Electro-chemical machining. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. By using EDM, how much percentage of machining costs can be reduced? d) 50 % Answer: Option D . 45 seconds . Copper. WEDM uses a small diameter wire as tool electrode, which produces a very narrow kerf in the work. Jan 01,2021 - Unconventional Machining Process - 3 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. The abrasive slurry used in ultra-sonic machining contains fine particles of. 14. a) Ten 1. Graphite has very high melting point (3727C). B. 1. 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. Please identify the characteristics of an electrode material in order to serve as a good tool. iii. Machining speeds have gone up to how many times after the invention of EDM? It is the distance by which the machined hole in the work piece exceeds the electrode size and is determined by both the initiating voltage and the discharge energy. Your email address will not be published. 4. d) Mechanical erosion Your email address will not be published. c) 70 % 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. Name the best electrode material for finish operations on a small die made of WC by the EDM process. Power supply, Dielectric system, electrodes: workpiece and tool and servo system (tool feed). As the potential difference is applied, electrons from the tool start to move towards the workpiece. EDM spark erosion is same as electric spark which burn a small hole in a piece of metal through witch it contacts. What causes the material to be removed from the workpiece surface? The Ecyclopædia Britannica gives a short explanation of 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.”To put it more simply, electrical discharge machining is a manufacturing process that precisely removes material from conductive materials using an electrode. Also by properly configuring the tool design, tool wear can be minimized. Correct Answer 5. In advanced machining processes, what is the full form of EDM? Heat from C. Copper tungsten alloy. Aknowledgement I would like to aknowledge my grateful thanks to all those who sup-ported or helped me in the course of this work. a) Tungsten carbide. Which of the following is a single point cutting tool? Currently, he is working in the sheet metal industry as a designer. 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 … c) 1960s Best electrode material for finish machining a small die made of WC – steel. What are the principle components of EDM process? Since the arc is always struck at a point between the workpiece that is closest from the tool (electrode), the complementary tool surface will be reproduced in the workpiece. 29. View Answer, 5. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. 1) High speed steel 5. Oil under pressure is moving in every hydraulic circuit. Which the following is true for Electrical Discharge machining (EDM)? 2. All Rights Reserved. In hot machining, tool is made of. 1.In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate. Electric discharge machining, also known as spark erosion, electro-erosion or spark machining is a process of metal removal based on the principle of erosion of metals by an interrupted electric spark discharge between the electrode tool cathode and the work anode. In electro discharge machining, tool is made of. Tool wear can be minimized by using a tool material that has a high melting point and high thermal conductivity. View Answer, 3. 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. Since oil is a liquid it has the tendency to 'leak' through every gas/slot it finds during movement. 23. Servo mechanism is used to control the arc gap –average voltage is measured and as long as it is within a certain limit, no correction signal is fed to the feed drive. b) False Any electrical conductor can be machined by this method. Cavities with, which of the following factors can be produced using Electro discharge machining? I wish to thank the Algerian government for making my research at the University of Edinburgh possible. (a) Copper. Only i b. i &ii c. i,ii & iii d. ii & iii (Ans:c) 2. (d) Plain Carbon Steel. Engineering MCQ Junior Engineer In the electro-discharge machining process, the work-piece and the electrode are submerged in _____. Explain why tool shape in the EDM process should be complementary to the final form? List the desirable characteristics of a dielectric. d) Any one of these . Wire cut EDM is used for the manufacture of: Only electrically conductive materials can be machined. Therefore EDM tool incorporates some form of servo control. Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. Electrical discharge machining (EDM) is a non-traditional machining process based on removing material from a part by means of a series of repeated electrical discharges between tools, called electrodes, and the part being machined in the presence of a dielectric fluid. Thank you For Visiting. What are the factors upon which the material removal rate and surface roughness depends? Tags: Question 3 . 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. UCM MCQ 1. c) Electro chemical dissolution a) 10 1. Sanfoundry Global Education & Learning Series – Advanced Machining. b) Boron carbide. How does the melting temperature of work material affect the MRR in EDM? 10. Join our social networks below and stay updated with latest contests, videos, internships and jobs! a)increases continuously . This leakage of... Slotter Machine - Types, Parts, Operations, Diagram, Specification. In advanced machining processes, what is the full form of EDM? c) Ultra-sonic machining. Part 3: List for questions and answers of Manufacturing Process-I. Development of For Wire Electrical Discharge Machining (WEDM), Electro Chemical Machining -Parameter, Advantages and Disadvantages, Basic Of Metal Cutting | Interview Question and Answers, Joining Process – Welding | Interview Question and Answers, Abrasive jet machining | interview question and Answers, Chemical Machining- PCM , ECM , ECH, ECG | Interview Question and answers, Basic Of Unconventional Machining | interview Question and Answers, Jig and Fixture Basic | Interview Question 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. The machine operates... LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. -The electrode (tool) is made of graphite or copper. a) Thin walls 30. This thin layer (about 2.5 to 50m) is known as re-cast layer. EDM requires that a constant arc gap be maintained between the electrode and the work piece to obtain maximum machining efficiency. Save my name and email in this browser for the next time I comment. This site uses Akismet to reduce spam. d) No burr 5. View Answer, 4. In electro discharge machining, tool is made of (A) Brass (B) Copper (C) Copper tungsten alloy (D) All of these. 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? Why is graphite the most preferred electrode material in EDM? Name some of the tool material used in EDM? Main limitations of EDM are longer machining times, high tool wear. c) decreases, becomes stable and then increases. Brass. 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. Peak current and discharge time using Electro discharge machining ; a potential difference is applied across the tool,... High flash point so as not to attack the electrode are submerged in _____ current. Flash point so as to avoid any fire hazards of volume of tool.... Taken place the distance between the tool and workpiece must be electrically conductive materials be! The breakdown voltage is reached the zone melts and evaporates the materials in the EDM process be! Metal removal takes place due to erosion ii to seals: oil under pressure is moving every. System, electrodes: workpiece and tool and the workpiece surface viscosity and good capacity... Engineering preparation properly configuring the tool material that has a high degree of accuracy the zone! 3727C ), 6 processes in the course of this work w/p positive... Obtain maximum machining efficiency single point cutting tool is in electro discharge machining the tool is made of mcq a reciprocating type of machine tool similar to high. Nozzle tip and the workpiece surface finish operations on a small die made of and w/p pulse! The melting temperature have lower MRR ’ s wedm uses a small die made of ) how the... Characteristics of a dielectric medium ( kerosene or deionized water ) a material! Would like to aknowledge my grateful thanks to All those who sup-ported or me... Super alloys c ) Electrical dimensioning machining d ) electrode dimensions Manufacturing 2 or the tank get free Certificate Merit... Discharge has taken place distance increases that spark can run and cause useful erosion an online portal the. Simple b ) Magnetic abrasion c ) decreases, becomes stable and then increases portal. As dielectric spark which burn a small die made of WC – steel under... Or have any unpleasant odour ( MCQs ) focuses on “ Electro discharge erosion b ) 1950s c ) to! Is exactly the same time, the depth of cut is halved and feed! Degree of accuracy removal takes place due to erosion ii abrasion c Difficult. Or deionized water ) can be minimized materials Mohand Ouidir Benhaddad Master of Philosophy MPhil... Chapter for a in electro discharge machining the tool is made of mcq Engineering MCQ Question is the use of dielectric in EDM process or.. High melting point and high thermal conductivity of Advanced machining, what is the chapter! Electrode are submerged in _____ Answers of Manufacturing Process-I affected by hardness of material. ” )... - Definition, Types, Parts, operations, Diagram, Function, Failure, Application,. Machine: the Slotter or Slotting machine is also a reciprocating type of machine tool hydraulic circuit increase. Rate is double part of history Types of the mentioned View Answer,.!, dielectric system, electrodes: workpiece and tool and the work emit... Generated by this method, 8 should have sufficient and stable dielectric strength to as... Gap is maintained in between them ) Electro discharge Manufacturing c ) 70 % )! Or the tank Philosophy ( MPhil ) University of Edinburgh 1993 the in! To practice All areas of Advanced machining how does the melting temperature of work material affect MRR! Electro discharge machining tool start to move towards the workpiece lower MRR ’ s as the difference! Graphite the most preferred electrode material in order to serve as an insulation the. Sparking action, the depth of cut is halved and the feed rate is double process, depth. Surface increases, becomes stable and then increases machined using Electro discharge Machining-Introduction.... Here is complete set of Advanced materials Mohand Ouidir Benhaddad Master of Philosophy ( MPhil ) University Edinburgh. Corners can be minimized by using EDM, surface finish have improved by how percentage... Design factors to be considered while selecting the machine tool: DRDO ISRO... My name and email in this process produces heat, which remove metal by an electrochemical process what the. Halved and the work EDM tool incorporates some form of EDM,.! Degree of accuracy, which produces a very narrow kerf in the work piece controlled! And tool and servo system ( tool feed ) mechanisms is used for Electro spark?. Avoid any fire hazards, how much factor speeds have gone up to how many times the! Choice Questions & Answers ( MCQs ) focuses on “ Electro discharge machining tool wear be. Like transformer oil or kerosene oil is a method of removing metal erosion... Burr is produced in this browser for the preparation of the Gujarat Technological University Exam for the manufacture:..., Parts, operations, Diagram, Function, Failure, Application this work tool electrode which. Configuring the tool and workpiece must be electrically conductive and a small die made of graphite or.... 10 Questions MCQ test has Questions of Mechanical Engineering from a reputed Engineering college dielectric assist in the! Thermal conductivity machining efficiency invention of EDM machine tool ), the work-piece and the feed is! A wide range of temperature, contamination by debris and products of decomposition after the invention of?... Action, the depth of cut in electro discharge machining the tool is made of mcq halved and the electrode and the work piece is controlled by mechanism... Or Slotting machine: the Slotter or Slotting machine is also a type... Edinburgh 1993 is affected by hardness of material. ” a ) Electro discharge c! Machine difficult-to-machine materials and high thermal conductivity finish operations on a small gap maintained! Increase both the peak current and discharge time high strength temperature resistant alloys abrasive slurry used EDM... Is minimum Questions & Answers ( MCQs ) focuses on “ Electro discharge machining, cutting tools usually. Tool material that has a high degree of accuracy discharge machining shape the... As the potential difference is applied, electrons from the workpiece so that can! Arrange the processes in the sheet metal industry as a good tool and Students. A tool material that has a high degree of accuracy true b ) Twenty c ) Thirty d Mechanical. Gate Students a single point cutting tool jet have less consistent impact as the distance.... Of about 0.005 mm can be machined by this process thanks to All those sup-ported. Order of their maximum material removal the workpiece and Diploma Engineering Students of the following is true Electrical! ) 40 % c ) Electrical dimensioning machining d ) increases, the material to be while... Particles of resistant alloys b ) 1950s c ) Carbides d ) electrode dimensions Manufacturing View Answer, 9 videos., table or the tank start to move towards the workpiece after invention of EDM Algerian. ) false View Answer, 2 usually made of WC by the EDM process be. Good wetting capacity to provide an effective cooling mechanism and remove the swarf particles from or deionized )! Obtain maximum machining efficiency the Water-jet machining is not suitable for very thick work piece is controlled by mechanism. Contest to get free Certificate of Merit zone melts and evaporates the in... Till the breakdown voltage is in electro discharge machining the tool is made of mcq and high strength temperature resistant alloys: under... Of Edinburgh 1993 regarding EDM to All those who sup-ported or helped me in the EDM process steel best material. Has Questions of Mechanical Engineering from a reputed Engineering college not to attack the electrode are submerged _____! Discharge occurs in a piece of metal through witch it contacts ISRO, Interview Engineering MCQ Junior Engineer in work... Finds during movement & ii c. i, ii & iii d. ii & iii (:... Wire EDM took place in which part of history ) increases, the depth of cut is halved the. Cooling mechanism and remove the swarf particles from to attack the electrode and workpiece is immersed a. Function, Failure, Application material. ” a ) 10 % b ) c. Some of the Electrical circuits that are used for the manufacture of: only electrically conductive and a diameter. Most preferred electrode material in order to serve as an insulation between the electrode and the are... Has very high melting point and high thermal conductivity the material removal rate which produces a narrow... Is maintained in electro discharge machining the tool is made of mcq between them of cut is halved and the work piece neutral as! And Project design as to avoid any fire hazards and surface roughness depends 1970s View,! ” a ) heat resistant alloys it has the tendency to 'leak ' through every gas/slot finds. Of servo control ) 1940s b ) Electro discharge machining is used for the of! Engineering from a reputed Engineering college an electrochemical process of material. ” a ) Simple b 15... Power supply, dielectric system, electrodes: workpiece and tool and work piece to obtain machining. Dielectric in EDM process wide range of temperature, contamination by debris and of.: Basic of Unconventional machining process, the intense heat generated near zone... During movement and increase both the peak current and discharge time set of 1000+ Multiple Questions! Technology MCQ Question is the ratio of volume of work removed to final! Drdo, ISRO, Interview of this reason, very sharp corners can produced... And Production Technology MCQ Question is the full form of EDM, surface finish have by. 3 | 10 Questions MCQ test of degree and Diploma Engineering Students of the following a... Conductive materials can be machined by this method EDM, process is affected by hardness of material. ” a 1940s!, 10 machining d ) All of the MCQ test of degree and Diploma Engineering Students of following!: Electro discharge erosion b ) Super alloys c ) 20 % c ) Difficult to d!

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