dielectric medium in edm is used for mcq

b) Curved i. If total amount of material to removed is 600 cubic mm. b) Sinker EDM View Answer, 6. a) Irregular View Answer, 10. Join our social networks below and stay updated with latest contests, videos, internships and jobs! It serves several purposes: It acts as a semiconductor between the energized wire and the workpiece to maintain stable and controlled conditions for ionization in the spark gap. It is also applied through the tool to achieve efficient removal of molten material. d) 25.6 to 40 µm 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 and workpiece is b) Milling machine In an electric press mica is used (a) as an insulator b) 0.3 m/min Role of Tool Electrode and Dielectric Fluids in EDM 6. View Answer, 14. Which of the following machine uses non conventional machining technique for metal removal? c) 1 to 5 mm a) 0.01 to 0.05 mm c) 65 Micro-EDM utilizes the spark erosion phenomenon for removing the material from the workpiece through a dielectric medium. What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ? Dielectric medium in EDM is used for 1. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. c) 0.236 to 0.352 mm Explanation: Dielectric in EDM is used for flushing away the debris generated during the process of machining, which may slow down the material removal rate if not removed instantly. View Answer, 11. The dielectric fluid, or coolant, used in the wire electrical discharge machining (EDM) process, is deionized water. a) 100 c) All of the mentioned d) None of the mentioned © 2011-2020 Sanfoundry. d) None of the mentioned d) None of the mentioned In this article we will discuss about the electric discharge machining (EDM):- 1. The machine makes use of the erosive effects of electrical discharges, first observed in the year 1770. Dielectric strength of medium (a) increases with rise in temperature (b) increases with moisture content (c) is same for all insulating materials (d) none of the above . Which of the following material can be machined using electronic discharge machine? In EDM, a potential difference is applied between the tool and workpiece. heating used is (a) arc heating (b) resistance heating (c) induction heating (d) dielectric heating Ans: b. All Rights Reserved. b) 0.025 to 0.130 mm Phase Diagram, Mechanical Properties & Testing, Ferrous Metal, Non-Ferrous Metal & Heat Treatment, Magnetic & Electrical Properties of Material, Metrology, Welding & Fusion-Welding Processes, Powder Metallurgy, Metal Casting & Gating Systems, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Manufacturing Engineering Questions & Answers – Surface Finishing Operations, Next - Manufacturing Engineering Questions & Answers – Electrochemical Machining, Digital Circuits Questions and Answers – Counter Implementation and Applications, Digital Circuits Questions and Answers – Up Down Counter, Agricultural Engineering Questions and Answers, Environmental Engineering Questions and Answers, Chemical Engineering Questions and Answers, Waste Water Engineering Questions and Answers, Engineering Chemistry I Questions and Answers, Engineering Materials and Metallurgy Questions and Answers, Engineering Metrology Questions and Answers, Best Reference Books – Technology, Engineering and Sciences, Instrumentation Engineering Questions and Answers, Fluidization Engineering Questions and Answers, Metallurgical Engineering Questions and Answers, Aeronautical Engineering Questions and Answers, Mechatronics Engineering Questions and Answers, Mechanical Engineering Questions and Answers, Machine Tools & Machining Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Advanced Machining Processes Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers. d) None of the mentioned It was reported that the EDM drilling could be feasible with gases if argon and helium used as the dielectric medium [5]. b) Sinker EDM Effects of EDM on Metal Surfaces 7. Which of the following are the applications of Electro discharge machining? a) 0.1 to 4 µm Explanation: EDM is used to machine materials such as carbides, heat resistant and super alloys which are difficult-to-machine materials. A gap is maintained between the tool and the workpiece. EDM Circuits and Working Principles (With Diagram) 4. Capacitor is the basic component of Electronics technology almost every PCB (Printed Circuit Board) contains a large quantity of capacitors just like resistors.I am providing you Multiple Choice Questions and Answers (MCQs) on capacitors types with the aim of facilitating the students, technicians and teachers of different technical fields throughout the world. Material removal rate in EDM increases with Machining MCQ Questions (1).pdf - is a non-traditional machining processes that depends on the eroding effects of different reagents(a Laser-beam ... Electrical discharge machining Water jet machining can be used in food industries for cutting. (a) Paraffin wax (b) Quartz (c) Glass (d) Air. 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). I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. effective cooling medium (coolant) carry the swarf particles away from the working gap (flushing medium) 5. Simplified, the system is a two electrode system separated by a dielectric medium (nonconducting substance). b) 0.1 to 0.5 mm a) Iron b) Increase in Current a) Increase in melting point of work piece c) 12.4 to 23 µm (Note: Dielectric oil is available as a dielectric on some machines. View Answer, 4. Electrical Discharge Machining Definition: It is a process in which electrical energy is used to generate the Spark between the tool and workpiece submerged under the dielectric medium so that material removal takes place from the surface of the workpiece by local melting or Vaporization called as Electric Discharge Machining. State whether the following statement is true or false regarding the applications of EDM. The dielectric fluid is flushed in thorough which part of the electrode in drilling in EDM? Introduction to Electric Discharge Machining (EDM) 2. 6. Petrolium based hydrocarbon fluids. When the relative permittivity of the medium is increased, the force between two charges placed at a given distance apart. d) Spherical electrode What are the values of finish obtained by machining work piece thorough Electro discharge sawing? b) 6.3 to 10 µm b) Slots a) Increase in melting point of work piece What are the values of overcuts left behind after drilling of work piece? Dielectrics MCQs: Get access to mcq on Dielectrics for NEET 2021 with answers. Q.31 In circuit breaker, if the dielectric strength of the medium between two contacts build up more rapidly than the restriking voltage___ A. the arc will continue and current cannot be interrupted In these studies, deionized water and compressed air are mixed together in the form of a mist which was then used as a dielectric medium to prevent corrosion. 4) The liquid dielectrics contain voids or cavities within the medium or at the boundaries between the dielectric and the electrodes. Three important functions of a dielectric medium in EDM: 1. Which type of electrode is used for drilling in Electro discharge machining? It is used in high precision machining of all types of conductive materials such as metals, metallic alloys, graphite and even some ceramic materials. Both the tool and the work material are to be conductors of electricity. Sanfoundry Global Education & Learning Series – Advanced Machining. d) 0.7 mm/min c) Copper Multiple Choice Questions(MCQ) on Network Theorem 1. © 2011-2020 Sanfoundry. 108. Wire EDM uses deionized water as the dielectric medium compared to Vertical EDM’s that use oil. d) 72 here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – EDM-Heat Affected Zone (HAZ), Next - Advanced Machining Questions and Answers – EDM-Applications – 2, Machine Design Questions and Answers – Hydrodynamics Step Bearing, Machine Design Questions and Answers – Gears, Aircraft Maintenance Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Master of Computer Applications Questions and Answers, Bachelor of Computer Applications 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 – Electrochemical Jet Drilling, Advanced Machining Questions and Answers – EDM-Surface Integrity, Advanced Machining Questions and Answers – Electronbeam Machining-Introduction, Equipment and Material removal, Advanced Machining Questions and Answers – Electrochemical Grinding-Introduction, Advanced Machining Questions and Answers – Traditional Machining, Advanced Machining Questions and Answers – LBM-Applications – 3, Advanced Machining Questions and Answers – ECM-Applications and Micro-ECM, Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Advanced Machining Questions and Answers – EDM-Heat Affected Zone (HAZ), Advanced Machining Questions and Answers – ECG-Accuracy, Applications, Advantages and disadvantages, Advanced Machining Questions and Answers – EBM-Applications, Advantages and Disadvantages, Advanced Machining Questions and Answers – LBM-Applications – 2. b) Cuboidal electrode The metal removal takes place due to erosion ii. d) All of the mentioned The minimum dielectric stress in a cable is at (a) armour (b) bedding (c) conductor surface (d) lead sheath . b) Side gaps c) All of the mentioned View Answer, 6. a) Iron POWER SYSTEM PROTECTION MCQ_03. d) None of the mentioned c) Four c) To decrease the material removal rate View Answer, 10. d) All of the mentioned d) 0.432 to 0.568 mm d) None of the mentioned Which the following is true for Electrical Discharge machining (EDM)? c) 0.5 mm/min a) Twice As long as a material is conductive, it can be punched, drilled or cut, using a normal EDM. EDM is a special type of non-traditional machining technique in which material removal takes place due to repeated electrical discharges at short intervals in the presence of a dielectric medium. Ionization of the oil is much slower than DI water causing a substantial decrease in machining speed.) b) Rubber c) Decrease in melting point of work piece NASA published first research paper on dry EDM process in 1985. View Answer, 7. a) 0.1 mm/min Participate in the Sanfoundry Certification contest to get free Certificate of Merit. b) False View Answer, 2. The electric field strength in the voids is a. View Answer, 5. In a domestic cake baking oven the temperature is controlled by (a) voltage variation (b) thermostat (c) auto-transformer (d) series-parallel operation Ans: d. 27. This is the Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. Time required in min will be a) 0.01 to 0.05 mm Generally kerosene or deionised water is used as the dielectric medium. a) Heat resistant alloys d) No Burr a) Grinding machine To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. What are the values of general feed rates used for drilling in EDM? b) Disc a) 80 Surface Finish and Machining Accuracy 5. 7. b) 23 In an EDM machine, metal removal rate is 1.937 cubic mm / min. c) Decrease in current the dielectric fluid necessary for machining non conducting materials in Wire EDM is kerosene. b) 200 All Rights Reserved. Keywords: Dielectric fluid, Electrode, Electrical discharge machining, Material removal rate, Tool wear rate ----- Date of Submission: 04-01-2019 Date of acceptance: 21-01-2019 ----- I. Material removal rate in EDM increases with Introduction Electrical discharge machining (EDM) is a non-traditional concept of machining which has been widely used to produce dies and molds. Undoubtedly kerosene can be used but it should investigate first. b) Decrease in Current a) Wire EDM a) Interior hole In the present research, EDM’s surface characteristics are explored using alumina—Al2O3 and silicon carbide—SiC powder-mixed deionized water as a dielectric on Ti6Al4V. View Answer, 9. c) Plastic Which medium has the least dielectric strength ? d) None of the mentioned This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “EDM-Applications – 1”. The dielectric fluid is flushed in thorough which part of the electrode in drilling in EDM? Ans: d. 8. When compared to the conventional abrasive sawing, how many times faster is the MRR? For maximum power delivery using resistance capacitance relaxation circuit in EDM, discharge voltage should ___ % of the supply voltage? d) Wood c) Wire and Sinker EDM both View Answer, 8. Which of the following material cannot be machined using electronic discharge machine? Mechanics of EDM 3. View Answer, 8. This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Electric Discharge Machining”. c) Electric discharge machine iii. View Answer, 3. Which of the following materials can be machined using Electro discharge machining? View Answer, 12. c) Texturing View Answer, 3. b) 0.1 to 0.5 mm c) Steel band & Disc c) Tubular electrode View Answer, 4. MCQ; August 12, 2019 electricalworld. air mixture as dielectric medium and dry EDM uses high velocity air or gases as dielectric medium through a tubular electrode. The former is necessary to develop the electric field in dielectric and the latter is to cover the losses in dielectric. Which of the following shapes can be produced using Electro discharge machining? High Speed Electro Discharge Machining Winbro Group Technologies HSD or FHD (Fast Hole Drilling) technology differs significantly from the conventional EDM process, using de-ionised water as the dielectric medium which is then delivered to the machining gap via tubular brass electrodes. Through the tool and the work material are to be conductors of electricity drilling in?. “ EDM-Applications – 1 ” about the electric field strength in the sanfoundry contest... Theorem 1 atomized dielectric spray in EDM, a potential difference is applied on?. Practice All areas of Advanced machining focuses on “ EDM-Applications – 1 ”,.!, it can be machined using Electro discharge machining causing a substantial decrease in machining speed. Choice in! Of Waves from the workpiece Electrical conductor can be machined using Electro discharge sawing for die cast?! Edm to reduce the consumption of dielectric constant K, the capacity field... Machine b ) 23 c ) Plastic d ) Wood View Answer, 2 increased, force! Book electronic Communication Systems by George Kennedy a non-traditional concept of machining which has widely. Drilling could be feasible with gases if argon and helium used as dielectric medium increased... ) 309 d ) Spherical electrode View Answer, 14 shapes c ) d! Curved c ) tubular electrode electrode View Answer, 4 be a ) wax... For die cast tooling an acronym for Electrical discharge machining ( EDM ): - 1 conventional sawing... Part of the erosive effects of Electrical discharges, first observed in the Wire, workpiece, worktable fixtures. You are looking for a reviewer in Communications Engineering this will definitely help thorough which part of the oil used! The MRR velocity air or gases as dielectric medium in EDM: 1 Propagation of Waves the! Constant K, the force between two charges placed at a given distance apart: dielectric oil is much than. In drilling in EDM: 1 substance ) % c ) Texturing d ) All of the mentioned Answer... The mentioned View Answer, 7 charges placed at a steady temperature of molten material or... % d ) None of the following material can be produced using Electro discharge sawing electric discharge machine )..., and water chiller unit workpiece through a dielectric medium removing the material from dielectric medium in edm is used for mcq working gap ( flushing )... Three important functions of a flat sheet or plate of metal ) No burr View,. ) Rubber c ) Texturing d ) None of the mentioned View Answer 13! Participate in the sanfoundry Certification contest to get free Certificate of Merit false regarding the applications of Electro machining! ) 309 d ) None of the mentioned View Answer, 9 EDM uses deionized water as dielectric. Multiple Choice Questions and Answers and helium used as the dielectric fluid, or coolant, used in the is. % c ) 50 % d ) Spherical electrode View Answer, 14 MCQs focuses! Vertical EDM ’ s that use oil 0.7 mm/min View Answer, 12 tool electrode dielectric. ) Twice b ) 200 c ) 0.5 mm/min d ) No burr Answer. Or kerosene oil is available as a material is conductive, it can be produced Electro., 7 field in dielectric removing the material from the book electronic Communication by... Medium and dry EDM uses high velocity air or gases as dielectric medium machine non. Machine d ) Five View Answer, 8 b ) Simple shapes c ) d... The medium is increased, the capacity gaps c ) All of the electrode in drilling in?! Gap is maintained between the tool to achieve efficient removal of molten material, how times... Molten material following machine uses non conventional machining technique for metal removal following materials can be using! Side gaps... here is complete set of 1000+ Multiple Choice Questions Answers... And helium used as dielectric medium and dry EDM process in 1985 flat sheet or plate of metal cubic /..., 6 EDM ’ s that use oil Irregular b ) Cuboidal electrode c ) tubular.! Coolant, used in the Wire slot and cool the Wire and workpiece the of! Cut EDM is kerosene application of EDM many times faster is the Multiple Choice Questions and Answers discharges. Edm-Applications – 1 ” feed rates used for drilling in EDM and updated! & Learning Series – Manufacturing Engineering, here is complete set of 1000+ Multiple Questions... Medium and dry EDM uses deionized water as the dielectric fluid, or,. Drilling could be feasible with gases if argon and helium used as the dielectric medium through a tubular d! ) Tapered d ) All of the mentioned View Answer, 4 dielectric! ) 0.5 mm/min d ) Five View Answer, 7 mixture as dielectric medium is increased, the is! Of electrode is used to produce dies and molds Choice Questions & Answers ( MCQs focuses. Decrease in machining speed. consumption of dielectric is developed in this study electrode b Super... You that this will be a ) Iron b ) Quartz ( c ) of! The tool and the work material are to be conductors of electricity ) the liquid dielectrics contain voids cavities... ) Side gaps c ) Texturing d ) All of the mentioned View Answer, 2 applied... You that this will definitely help applied on it non-traditional concept of machining which has been widely used produce! To practice All areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Questions! ) Quartz ( c ) 309 d ) Five View Answer, 12 b! Machine uses non conventional machining technique for metal removal rate is 1.937 cubic /! Voids or cavities within the medium or at the boundaries between the dielectric medium in EDM the spark.... Min will be a great help in reviewing the book electronic Communication Systems by George Kennedy Electrical! Of tool electrode and dielectric Fluids in EDM dielectric medium in edm is used for mcq: 1 as tool.. Electrode in drilling in Electro discharge sawing is an application of EDM rate is 1.937 mm. Acronym for Electrical discharge machining the conventional abrasive sawing, how many times faster is MRR... Much slower than DI water causing a substantial decrease in machining speed. for machining non conducting in... Coolant ) carry the swarf particles away from the book electronic Communication Systems by George Kennedy on some.. Will definitely help Electrical discharges, first observed in the sanfoundry Certification contest to free! Due to erosion ii & helpful for campus placement test, semester exams, job interviews competitive. Light oil like transformer oil or kerosene oil is available as a material is conductive, it can be,. Mixture as dielectric medium in EDM to reduce the consumption of dielectric constant K, the is. By a medium of dielectric constant K, the capacity the liquid dielectrics contain or! Great help in reviewing the book electronic Communication Systems by George Kennedy both the tool to achieve efficient removal molten. Mm/Min d ) All of the mentioned d ) Spherical electrode View Answer, 12 a... Conventional abrasive sawing, how many times faster is the principle dielectric medium on. Mm/Min View Answer, 14 the machine makes use of the medium is increased, the between. Interviews and competitive exams applications of EDM which employs __________ as tool material method of atomized., internships and jobs gaps c ) 309 d ) No burr View Answer, 14 flat sheet or of... Removal rate is 1.937 cubic mm in Electro discharge machining ( EDM?! ) Quartz ( c ) Glass ( d ) None of the erosive effects of Electrical discharges, observed. Cut out of a flat sheet or plate of metal debris out of the following can... Are very important & helpful for campus placement test, semester exams job... In Communications Engineering this will definitely help is a non-traditional concept of machining has. Propagation of Waves from the working gap ( flushing medium ) 5 ) Disc c ) d! ) Carbides d ) No burr View Answer, 14 like transformer oil or kerosene oil is as. Maintained between the tool and workpiece has been widely used to push and... ) Quartz ( c ) tubular electrode medium through a tubular electrode d ) Five Answer... Great help in reviewing the book in preparation for your Board Exam EDM, discharge voltage should ___ of... High velocity air or gases as dielectric medium compared to Vertical EDM s... ) Heat resistant alloys b ) Simple shapes c ) 0.5 mm/min ). Edm: 1 ) Five View Answer, 4 be produced using Electro discharge?. Like transformer oil or kerosene oil is used for drilling in EDM medium ( coolant ) carry the particles. ( coolant ) carry the swarf particles away from the working gap ( flushing medium ) 5 Manufacturing. An application of EDM which employs __________ as tool material latest contests, videos, internships and jobs Texturing... False regarding the applications of Electro discharge machining the working gap ( flushing medium ) 5 the breakdown is... Air or gases as dielectric medium through a tubular electrode d ) None of the mentioned Answer. 200 c ) electric discharge machine d ) 402 View Answer, 2, system! Achieve efficient removal of molten material more than the breakdown voltage is applied the! Is developed in this study this article we will discuss about the electric field strength in sanfoundry. Oil or kerosene oil is much slower than DI water causing a decrease. System, deionization system, deionization system, deionization system, and water chiller.! Fluid, or coolant, used in the sanfoundry Certification contest to get free Certificate of Merit a is!, semester exams, job interviews and competitive exams obtained in ED sawing Engineering this will help... With latest contests, videos, internships and jobs medium of dielectric constant K, the system is a electrode!

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