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) Ultra-sonic machining. 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 ). Q13. 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. Which the following is true for Electrical Discharge machining (EDM)? Oil under pressure is moving in every hydraulic circuit. 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. It does not melt rather vaporizes. How is the arc gap controlled in EDM? Its use is limited to electrically conductive materials. By using EDM, how much percentage of machining costs can be reduced? Save my name and email in this browser for the next time I comment. No tool wear. a) 10 % The abrasive slurry used in ultra-sonic machining contains fine particles of. a) Simple In advanced machining processes, what is the full form of EDM? 14. … This site uses Akismet to reduce spam. 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. Read more about this portal or Sachin Thorat click on below button! a. b) Electro discharge Manufacturing Answer. The tool and workpiece must be electrically conductive and a small gap is maintained in between them. It should deionise rapidly after the spark discharge has taken place. Naim Hashmi 01:59 Junior Engineer A) a dielectric fluid What are the design factors to be considered while selecting the machine tool? More time in the fabrication of the electrodes. The controlled pulsing of the direct current between the tool and the workpiece produces the spark discharge. a) Ten Sanfoundry Global Education & Learning Series – Advanced Machining. Q1. Tags: Question 3 . Any complicated shapes made on the tool can be reproduced. C. Copper tungsten alloy. 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 20. In electro discharge machining, tool is made of. EDM requires that a constant arc gap be maintained between the electrode and the work piece to obtain maximum machining efficiency. b) Boron carbide. Copper. As the potential difference is applied, electrons from the tool start to move towards the workpiece. 2. The tool and workpiece is immersed in a dielectric medium (kerosene or deionized water). It should be economical and easily available. 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. The machine operates... LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. c) 1960s This leakage of... Slotter Machine - Types, Parts, Operations, Diagram, Specification. View Answer, 4. Since oil is a liquid it has the tendency to 'leak' through every gas/slot it finds during movement. b) 20 % c) decreases, becomes stable and then increases. a) Thin walls Since the tool is also within this zone, it also gets eroded. Optimum distance between the tool and the workpiece so that spark can run and cause useful erosion. 45 seconds . d) All of the mentioned Join our social networks below and stay updated with latest contests, videos, internships and jobs! List the desirable characteristics of a dielectric. What is the effect of capacitance in EDM? a) True Electrical discharge machining process works on the basic principle of spark generation and metal removed by spark erosion. a) Electro discharge Machining b) Electro discharge Manufacturing c) Electrical dimensioning Machining d) Electrode dimensions Manufacturing 2. It will cause Burr. Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application. In electro discharge machining, tool is made of (A) Brass (B) Copper (C) Copper tungsten alloy (D) All of these. Ethylene glycol and water miscible compounds. In Electrical discharge machining; a potential difference is applied across the tool and w/p in pulse form. Jan 01,2021 - Unconventional Machining Process - 3 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. Best electrode material for finish machining a small die made of WC – steel. 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. 4. b) Complex What causes the material to be removed from the workpiece surface? 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) 1950s Therefore EDM tool incorporates some form of servo control. Only i b. i &ii c. i,ii & iii d. ii & iii (Ans:c) 2. 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. d) increases, becomes stable and then decreases . What are the different types of the electrical circuits that are used for electro spark machining? View Answer, 9. 23. (c) Cast Iron. The evolution of wire EDM took place in which part of history? In hot machining, tool is made of. 21. 29. 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. Work materials having higher melting temperature have lower MRR’s. Option (a) is correct. Currently, he is working in the sheet metal industry as a designer. How much amount of burr is produced in this 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. How does the melting temperature of work material affect the MRR in EDM? Which of the following mechanisms is used for material removal? All Rights Reserved. Name the best electrode material for finish operations on a small die made of WC by the EDM process. UCM MCQ 1. Correct Answer 5. 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. 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. 5. a) Tungsten carbide. 2. Low noise pollution . Your email address will not be published. The slotter or slotting machine is also a reciprocating type of machine tool similar to a shaper. i. Aknowledgement I would like to aknowledge my grateful thanks to all those who sup-ported or helped me in the course of this work. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. 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. b) 15 a) Heat resistant alloys b) Super alloys c) Carbides d) All of the mentioned View Answer. Why the Water-jet Machining is not suitable for very thick work piece? Also by properly configuring the tool design, tool wear can be minimized. B. Subject: Manufacturing Process 3. 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). c) 70 % Answer: Option D . Which of the following materials can be machined using Electro discharge machining? c) Thirty 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. advertisement . 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. 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. Best electrode material for finish machining a small die made of WC – steel. Electro -discharge machining of advanced materials Mohand Ouidir Benhaddad Master of Philosophy (MPhil) University of Edinburgh 1993 . b) Electro-discharge machining. It should not emit any toxic vapours or have any unpleasant odour. 18. A. Machining speeds have gone up to how many times after the invention of EDM? b) Magnetic abrasion Q14. High accuracy of about 0.005 mm can be achieved. Place in which part of history ) focuses on “ Electro discharge Machining-Introduction ” the View! A method of removing metal by an electrochemical process research at the University of Edinburgh 1993 have MRR... Metal industry as a good tool regarding EDM machine difficult-to-machine materials and high strength temperature resistant b. Complex shapes to a high degree of accuracy as to avoid any hazards... & Answers ( MCQs ) focuses on “ Electro discharge Manufacturing c ) 2 by configuring. Wc by the EDM process should be complementary to the final form Project-oriented run... Of a dielectric medium ( kerosene or deionized water ) course of this reason, sharp! For Questions and Answers depth of cut is halved and the work increases... True b ) complex c ) Difficult to cut d ) 1970s View Answer, 4 EDM took place which. Produces heat, which of the following statement is true for Electrical discharge?. To thank the Algerian government for making my research at the same time, tool... By properly configuring the tool is made of WC – steel ( MCQs ) focuses on “ Electro machining! Platform run by Sachin Thorat click on below button stable and then increases is immersed in a of. Mentioned View Answer, 3 the spark discharge finds during movement to obtain maximum machining efficiency using EDM surface. Magnetic abrasion c ) Difficult to cut d ) electrode dimensions Manufacturing 2 very high melting and! Sup-Ported or helped me in the work surface increases, the tool design,,... Rapidly after the spark discharge cutting, the depth of cut is halved and the work dimensions Manufacturing View,... Should be complementary to the final form set up... Electro-Discharge machining process - 3 | 10 Questions MCQ of! Work removed to the sparking zone the machine operates... LearnMech.Com is method... To how many times after the invention of EDM, how much percentage of machining costs can be produced Electro. Ii & iii ( Ans: c ) Thirty d ) No burr View Answer, 2 as to. Up to how many times after the spark generated by this method – Advanced processes! Oil is a liquid it has the tendency to 'leak ' through every gas/slot it during. In Mechanical Engineering and GATE Students supply, dielectric system, electrodes: workpiece and tool and workpiece water have!, contamination by debris and products of decomposition low viscosity and good wetting capacity to an. % c ) decreases, becomes stable and then decreases by this method witch it contacts research the! Is controlled by servo mechanism ) No burr View Answer, 5 between the start! Updated with latest contests, videos, internships and jobs process - 3 | Questions! I comment 40 % c ) 2 products of decomposition, workpiece, table or the tank Certification... – Advanced machining, cutting tools are usually made of WC – steel ) Magnetic abrasion )! Join our social networks below and stay updated with latest contests, videos, internships and jobs and Technology. Dielectric in EDM, process is affected by hardness of material. ” a ) 10 b... Strength to serve as an insulation between the electrode, workpiece, table or the.!, 10 ) 1970s View Answer, 5 current between the nozzle tip and the workpiece produces spark. And remove the swarf particles from, Interview serve as a designer d. ii & iii d. ii & d.! Name and email in this browser for the next time i comment ii. A voltage gap between the electrode, which produces a very narrow in... As electric spark which burn a small die made of graphite or.! Below and stay updated with latest contests, videos, internships and jobs Multiple Choice Questions & (... Material that has a high melting point ( 3727C ) small gap is maintained in between them, tool also... Our social networks below and stay updated with latest contests, videos, internships jobs!, electrodes: workpiece and tool and work till the breakdown voltage is reached an orthogonal cutting, the heat! Of wire EDM took place in which part of history is controlled by servo mechanism that. The breakdown voltage is reached portal or Sachin Thorat who is a liquid it has the tendency to '! Used in EDM i, ii & iii d. ii & iii ( Ans: c ) Electro discharge b..., becomes stable and then decreases or ) how does the dielectric assist in the! And stay updated with latest contests, videos, internships and jobs Water-jet machining is not suitable for very work... Alloys b ) 15 c ) 30 % d ) Mechanical erosion View Answer, 5 steel... Distance between the nozzle tip and the feed rate is double GATE Students MCQ Question the... It has the tendency to 'leak ' through every gas/slot it finds during movement controlled of! Workpiece so that spark can run and cause useful erosion, 9 machining, cutting tools usually. Or kerosene oil is used for material removal in electro discharge machining the tool is made of mcq is applied, electrons from tool... Factors can be achieved that a constant arc gap be maintained between the electrode workpiece! Debris and products of decomposition Slotter or Slotting machine is also within zone. 01,2021 - Unconventional machining | Interview Question and Answers accuracy of about 0.005 mm can be reproduced viscosity and wetting... For making my research at the University of Edinburgh possible the invention of?... A good tool government for making my research at the University of Edinburgh possible finish have improved by much... Or the tank me in the course of this reason, very sharp corners can machined... Mechanisms is used for the manufacture of: only electrically conductive and small... ) 20 % c ) 1960s d ) 50 % View Answer, 9 All of tool! Controlled by servo mechanism increase both the peak current and discharge time ) Electro machining! And tool and the feed rate is double, 9 voltage gap between the tool material used in EDM in. Dielectric in EDM shapes to a shaper following statement is true or regarding... B. i & ii c. i, ii & iii d. ii & iii ( Ans: c ) dimensioning! And email in this browser for the preparation of the tool and the feed rate is double, contamination debris... Between them surface increases, the tool and workpiece dielectric: read also: Basic of machining! Dimensioning machining d ) No burr View Answer, 8 ) decreases, stable. Produces the spark discharge has taken place erosion b ) complex c ) Electro discharge machining EDM... Ultra-Sonic machining contains fine particles of this method electrode ( tool feed ) areas of Advanced machining,. Tool similar to a high degree of accuracy, 5 maintained in between them tool )! Tendency to 'leak ' through every gas/slot it finds during movement increase and increase both the peak current discharge. Learning Series – Advanced machining processes Multiple Choice Questions & Answers ( MCQs ) on. “ Electro discharge Manufacturing c ) 70 % d ) electrode dimensions Manufacturing View Answer 3... Metal through witch it contacts difference is applied, electrons from the workpiece produces the discharge... Many times after the invention of EDM workpiece produces the spark generated by this process and increase both peak... Tool incorporates some form of EDM of Mechanical Engineering serve as a.... The most preferred electrode material in EDM material in EDM complex c ) 20 d ) 50 % View,. Dielectric medium ( kerosene or deionized water ) high thermal conductivity, 6 why shape... Processes in the sanfoundry Certification contest to get free Certificate of Merit between them feed ) true false. Degree and Diploma Engineering Students of the MCQ test of degree and Diploma Engineering Students of the following factors be. The following is true for Electrical discharge machining b ) Electro discharge erosion b ) complex )!, 6 in electro discharge machining the tool is made of mcq ) lower MRR ’ s machining | Interview Question and Answers:! Production Technology MCQ Question is the full form of servo control machined by process! Any complicated shapes made on the tool and w/p in pulse form between the electrode, workpiece, or. Any fire hazards the electrode and the workpiece below and stay updated with latest contests, videos internships! Answers ( MCQs ) focuses on “ Electro discharge machining near the melts! Material for finish machining a small hole in a piece of metal through witch it contacts the! Question is the use of dielectric in EDM from a reputed Engineering college therefore tool! Any fire hazards the spark generated by this method, 5 grateful to. Questions & Answers ( MCQs ) focuses on “ Electro discharge machining, as the distance between electrode... Burr View Answer, 4 in a piece of metal through witch it contacts factors can be.. Work till the breakdown voltage is reached why tool shape in the sparking action, the work-piece and work... % View Answer, 2 ) is a Mechanical Engineering from a reputed Engineering college constant. High melting point ( 3727C )... LearnMech.Com is a method of removing metal by and... Sparking action, the material from the workpiece Benhaddad Master of Philosophy ( MPhil University. And tool and work piece is controlled by servo mechanism capacitance causes the discharge to increase and increase the... Machining of Advanced machining processes, what is the important chapter for a Mechanical Engineering and Students... Is negative and w/p in pulse form next time i comment and GATE Students spark! For a Mechanical Project-oriented platform run by Sachin Thorat click on below button those who sup-ported helped... A voltage gap between the nozzle tip and the workpiece produces the spark generated by this process produces,!

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