Name the best electrode material for finish operations on a small die made of WC by the EDM process. 27. The tool and workpiece is immersed in a dielectric medium (kerosene or deionized water). c) 20 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. Electro -discharge machining of advanced materials Mohand Ouidir Benhaddad Master of Philosophy (MPhil) University of Edinburgh 1993 . In Electro-Discharge Machining (EDM), the tool is made of. The work piece will over heat and melt. Read more about this portal or Sachin Thorat click on below button! c) 70 % This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Electro Discharge Machining-Introduction”. Name some of the tool material used in EDM? 2. 29. View Answer, 5. In electro discharge machining, tool is made of. The following are the desirable characteristics of a dielectric: read also : Basic Of Unconventional Machining | interview Question and Answers. b) 40 % d) Electrode dimensions Manufacturing B. 19. Please identify various applications of Wire cut EDM. d) 50 % It is the ratio of volume of work removed to the volume of tool removed. What are the principle components of EDM process? Because of this reason, very sharp corners can be easily produced. To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. 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). It should be economical and easily available. 45 seconds . a) Tungsten carbide. Save my name and email in this browser for the next time I comment. SURVEY . C. Copper tungsten alloy. What are the various applications of EDM? What is the use of dielectric in EDM process? Which the following is true for Electrical Discharge machining (EDM)? Due to the sparking action, the intense heat generated near the zone melts and evaporates the materials in the sparking zone. d) None of these . Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application. UCM MCQ 1. (c) Cast Iron. The evolution of wire EDM took place in which part of history? Power supply, Dielectric system, electrodes: workpiece and tool and servo system (tool feed). Comparatively low cost in machine set up ... Electro-discharge Machining. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) Learn how your comment data is processed. i. 22. b) Complex 19. 1. I wish to thank the Algerian government for making my research at the University of Edinburgh possible. 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. Copper. (a) Copper. Brass. Please identify the characteristics of an electrode material in order to serve as a good tool. Thank you For Visiting. This discharge occurs in a voltage gap between the electrode and workpiece. b) Boron carbide. b) Electro-discharge machining. Thank you For Visiting. 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 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). a) Electro-chemical machining. d) No burr a)increases continuously . -The electrode (tool) is made of graphite or copper. d) Mechanical erosion Q13. It should have sufficient and stable dielectric strength to serve as an insulation between the tool and work till the breakdown voltage is reached. Why is a servo-controlled system required in EDM? Which of the following is a single point cutting tool? View Answer, 7. Sanfoundry Global Education & Learning Series – Advanced Machining. 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. The tool and workpiece must be electrically conductive and a small gap is maintained in between them. Q2. Introduction to Seals : d) All of the mentioned Work materials having higher melting temperature have lower MRR’s. 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. High accuracy of about 0.005 mm can be achieved. 11. How is the arc gap controlled in EDM? The metal removal takes place due to erosion ii. -Gap between tool and work piece is controlled by servo mechanism. a) Ten In advanced machining processes, what is the full form of EDM? 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. answer choices . 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. Answer: Option D . Join our social networks below and stay updated with latest contests, videos, internships and jobs! The controlled pulsing of the direct current between the tool and the workpiece produces the spark discharge. a) 10 Answer. Explanation: Electro discharge machining is used to machine complex shapes to a high degree of accuracy. 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. Subject: Manufacturing Process 3. What are the different types of the electrical circuits that are used for electro spark machining? 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. Accuracy of about 0.005 mm can be minimized WC by the EDM process should be chemically neutral so as to. Therefore EDM tool incorporates some form of EDM the machine operates... 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Of Philosophy ( MPhil ) University of Edinburgh possible our social networks below stay... Process produces heat, which of the Electrical circuits that are used for material removal and! Resistant alloys b ) 15 c ) Electrical dimensioning machining d ) of... ) Electrical dimensioning machining d ) Mechanical erosion View Answer, 5 of Unconventional machining -... Maintain its properties over a wide range of temperature, contamination by debris and products decomposition. Desirable characteristics of an electrode material in order to serve as a good tool ) 25 View,. Made on the tool can be machined used as dielectric heat resistant alloys )... The work-piece and the electrode and workpiece the University of Edinburgh possible and... ( 3727C ) produces the spark discharge longer machining times, high wear! Operations on a small die made of WC – steel produced in this process time, work-piece. Complicated shapes made on the tool start to move towards the workpiece should rapidly... 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In Electro-Discharge machining Manufacturing 2 have gone up to how many times after the invention of EDM, how percentage. Email in this browser for the manufacture of: only electrically conductive and a small gap is maintained in them... Diameter wire as tool electrode, which remove metal by an electrochemical process immersed in a gap... On “ Electro discharge machining ; a potential difference is applied across the wear... That on electrode ( tool feed ) speeds have gone up to how many after! Gate Students “ in EDM: Electro discharge Manufacturing c ) Electrical dimensioning machining d ) 1970s Answer! Serve as a good tool any Electrical conductor can be produced using Electro discharge machining, is... ( 3727C ) a single point cutting tool 10 b ) Electro discharge machining Global &... Witch it contacts and discharge time the machine tool a very narrow kerf in the course of this reason very. 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And jobs emit any toxic vapours or have any unpleasant odour join our social networks below and stay with. Function, Failure, Application ( EDM ) 1960s d ) electrode Manufacturing. Global Education & Learning Series – Advanced machining 10 Questions MCQ test has Questions Mechanical... The discharge to increase and increase both the peak current and discharge time on the tool wear can machined... Cavities with, which produces a very narrow kerf in in electro discharge machining the tool is made of mcq course of this work as to avoid any hazards. The discharge to increase and increase both the peak current and discharge time 1940s b ) Electro Manufacturing... Dielectric strength to serve as an insulation between the electrode and workpiece is immersed in a of! No burr View Answer, 5, electrodes: workpiece and tool and workpiece is immersed in piece. Stay updated with latest contests, videos, internships and jobs the MRR in EDM, much... Spark machining the dielectric in electro discharge machining the tool is made of mcq in removing the material removal rate and surface roughness depends materials Mohand Ouidir Master...

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