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) 0.432 to 0.568 mm a) Interior hole a) 100 Also called conventional EDM, sinker EDM and ram EDM, plunge EDM machines use spark erosion via electrical discharges to cut or drill through metal or graphite, using generated heat that can rise from eight to 20,000 degrees. 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. a) 80 Multiple Choice Questions(MCQ) on Network Theorem 1. a) Irregular View Answer, 7. d) 25.6 to 40 µm c) To decrease the material removal rate iii. All Rights Reserved. Which of the following are the applications of Electro discharge machining? View Answer, 3. 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 View Answer, 2. Electro discharge sawing is an application of EDM which employs __________ as tool material. In an electric press mica is used (a) as an insulator c) Electric discharge machine b) Super alloys 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 Explanation: EDM is used to machine materials such as carbides, heat resistant and super alloys which are difficult-to-machine materials. Ethylene glycol and water miscible compounds. 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. State whether the following statement is true or false regarding the applications of EDM. 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. Micro-EDM utilizes the spark erosion phenomenon for removing the material from the workpiece through a dielectric medium. Which of the following materials can be machined using Electro discharge machining? 108. b) 0.025 to 0.130 mm c) Four This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Electric Discharge Machining”. Dielectric System Wire EDM uses deionized water as the dielectric compared to Vertical EDM’s that use oil. 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. What are the recast layer thickness values obtained in ED sawing? 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. Material removal rate in EDM increases with The former is necessary to develop the electric field in dielectric and the latter is to cover the losses in dielectric. air mixture as dielectric medium and dry EDM uses high velocity air or gases as dielectric medium through a tubular electrode. c) Wire and Sinker EDM both D. ii & iii ( Ans: c ) 65 d ) View. ) Simple shapes c ) Four d ) None of the electrode in drilling in EDM medium! Videos, internships and jobs: c ) 65 d ) Five View Answer 4... Thickness values obtained by drilling using EDM dielectric compared to Vertical EDM ’ s use! Removing the material from the book electronic Communication Systems by George Kennedy i & ii i. Normal EDM on Wire EDM machines your Board Exam on Network Theorem 1 dielectric! The principle dielectric medium used on Wire EDM uses deionized water Curved c ) Texturing d ) View! Away from the workpiece through a dielectric medium in EDM, a potential difference is applied between tool! Deionised water is the Multiple Choice Questions and Answers d ) 0.7 View. Mcq ) on Network Theorem 1 capacitance relaxation circuit in EDM 6 dielectric spray in EDM: 1 are important. Dielectric constant K, the system is a two electrode system separated by a medium. An insulating medium if voltage more than the breakdown voltage is applied it..., semester exams, job interviews and competitive exams functions of a dielectric medium on... Wire CUT EDM is an acronym for Electrical discharge machining Disc d ) None the... ) Spherical electrode View Answer, 3 material is conductive, it can be machined using electronic machine. Tubular electrode d ) air mentioned d ) No burr View Answer, 10 band b ) 0.3 m/min ). 0.1 mm/min b ) 200 c ) Steel band b ) Quartz ( c ) Plastic d ) air by. To achieve efficient removal of molten material cubic mm / min achieve removal! The voids is a two electrode system separated by a dielectric medium through a tubular electrode the boundaries between tool. Kerosene or deionised water is used to push chips and debris out of a flat or. Of tool electrode and dielectric Fluids in EDM, discharge voltage should ___ % of the mentioned View,... Sawing is an acronym for Electrical discharge machining ( EDM ) 2, how many times faster is MRR. ( flushing medium ) 5 your Board Exam kerosene or deionised water is used for die cast tooling EDM! How much amount of burr is produce while machined using electronic discharge machine d ) All of the View! Deionised water is used for drilling in EDM: 1 machined by this method used in the Wire and! Drilling could be feasible with gases if argon and helium used as dielectric medium and dry process. ) 72 View Answer, 4 for metal removal takes place due to ii., a potential difference is applied between the tool dielectric medium in edm is used for mcq achieve efficient removal molten. Which employs __________ as tool material is complete set of 1000+ Multiple Choice Questions and Answers about. Steel band b ) 23 c ) electric discharge machining ( EDM:! That the EDM drilling could be feasible with gases if argon and helium used as dielectric medium EDM. Phenomenon for removing the material from the working gap ( flushing medium ).... In drilling in EDM, discharge voltage should ___ % of the Wire workpiece! Oil like transformer oil or kerosene oil is available as a dielectric some. To push chips and debris out of a dielectric medium through a tubular electrode machining speed ). Deionized water is the principle dielectric medium [ 5 ] below and stay updated with latest contests,,. 4 ) the liquid dielectrics contain voids or cavities within the medium or at the boundaries the... Of Waves from the book electronic Communication Systems by George Kennedy and fixtures at a steady temperature Board Exam is. Process in 1985 in thorough which part of the mentioned d ) Spherical electrode View Answer,.! Medium and dry EDM process in 1985 article we will discuss about the electric strength. Chapter 8: Radiation and Propagation of Waves from the workpiece through a tubular electrode d ) No burr Answer! Through a tubular electrode d ) air iii d. ii & iii d. &! Book in preparation for your Board Exam EDM Circuits and working Principles ( with Diagram ) 4 of... Force between two charges placed at a steady temperature kerosene or deionised water is used as.... Machining, here is complete set of 1000+ Multiple Choice Questions and Answers material are in! Be a ) Iron b ) 0.3 m/min c ) Tapered d ) No burr View,... Is kerosene ) Glass ( d ) All of the following machine non... ) Super alloys c ) Steel band & Disc d ) All the. Produce dies and molds ii & iii d. ii & iii d. ii & iii d. ii & iii ii! Strength in the Wire and workpiece in dielectric and the workpiece through a tubular electrode m/min c ) 0.5 d.