In this mechanical engineering coures we study of machine design or objective. In Electron beam machining, workpiece is held in a. vacuum chamber b. dielectric medium c. electrolyte d. none of these (Ans:a) 7. 2. The appearance of EBM equipment is very similar to electron beam welding equipment. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. EBM is also used for microdrilling, cutting, and engraving applications. 30990675 Howick Place | London | SW1P 1WG © 2020 Informa UK Limited. In Electron beam machining, as the electrons strikes the work piece a. EmoticonEmoticon, In this mechanical engineering lecture today we learned about machine design subjects. Ionic dissolution rate is faster at the closest point between tool and workpiece. c) electrolyte. In Electron beam machining, workpiece is held in. please do not enter any spam link in the comment box As the electron strikes the workpiece, the kinetic energy of the electron changes into heat energy. Electron Beam Machining can machine metallic as well as nonmetallic workpiece. 22.16 Which one of the following processes would be appropriate to drill a hole with a square cross section, 6 mm (0.25 in) on a side and 25 mm (1 in) deep in a steel workpiece: (a) abrasive jet machining, (b) chemical milling, (c) EDM, (d) laser beam machining, (e) oxyfuel cutting, (f) … A wide range of materials, such as stainless steel, nickel and cobalt alloys, copper, aluminum, titanium, ceramics, leather, and plastics, can be successfully processed by EBM. Because EBM is a thermal machining process, some thermal effects remain on the machined edge after processing. 160,000 km/sec.) Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Manufacturing Processes - 2 Q. • A magnetic deflection coil is used to make electron beam circular and to focus electron beam at a point (localized heating). Electrons escapes from the hot surface and a voltage of 50 to 200 kV helps to accelerate them. Not for hard metals c. Direct contact machining d. Capable of producing sharp corners (Ans:a) 6. This will generate high heat energy and melts and vaporize metal from work piece. Traffic tools, such as cars, trains, planes, etc 3. In Electron beam machining, workpiece is held in a. vacuum chamber b. dielectric medium c. electrolyte d. none of these (Ans:a) 19. ; 2. b) dielectric medium. c. Direct contact machining d. Capable of producing sharp corners (Ans:a) 18. Ø Operating Parameters ± Power: EBM operations are performed at voltage ranging from 50-150 kV. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. The Electron beam machining (EBM) process begins after the workpiece is placed in the work chamber and a vacuum is achieved. Hello friends my name is Roshan Namdeo Waje and founder of mechstudy.here I shere the imforfation about mechanical engineering. In electron beam machining (EBM) vacuum Is maintained to have proper kinetic energy of electron beam. b) dielectric medium. MAGNETIC LENSES - Which shapes the electron beam and doesn't allow to deflect electrons, this lenses allow only to pass convergent electron, thus a highly focused beam is obtained, they also accept the low energy electrons thereby improving the quality of the same 3.WORKPIECE AND HOLDING DEVICE - It can machine both metallic and nonmetallic device, the workpiece is held by a … In this mechanical engineering lecture today we learned about machine design subjects Mcq on electron beam welding (objectives questions and answers). At present, most of our products are manufactured and assembled by traditional methods, such as: 1. A typical triode EBM gun functions in a manner very similar to an EBW gun. When high-speed electrons in a densely focused beam impact with the workpiece surface, most of the kinetic energy of the electrons is converted into heat energy. Electron beam machin mcq, mcqs on electron beam machining, multiple choice questions on electron beam machining, electron beam machining multiple choice question, electron beam machining objective questions, quiz on electron beam machining, mcq on electron beam machining, electron beam machining questions and answers, electron beam machining objectives questions,test … Electron-beam machining (EBM) is a process where high-velocity electrons concentrated into a narrow beam that are directed towards the work piece, creating heat and vaporizing the material.EBM can be used for very precise cutting or boring of a wide variety of metals. The appearance of EBM equipment is very similar to electron beam welding equipment. Electron Beam Machining (EBM) Electro-Chemical Machining (ECM) ... Material removal takes place from all such points on the workpiece where the electron beam is focused. The production of free electrons is obtained from thermo-electronic cathodes wherein metals are heated to the temperature at which the electrons gain enough speed for escaping to the space around the cathode. Electron beam machining is the metal removal process by a high-velocity focussed stream of electrons which heats, melts and vaporizes the work material at the point of bombardment.. ... Rubbing action between tool and workpiece. The heat energy so produced is used to melt and vaporize the materials from the w/p. Other articles where Electron-beam machining is discussed: machine tool: Electron-beam machining (EBM): The EBM technique is used for cutting fine holes and slots in any material. The appearance of EBM equipment is very similar to electron beam welding equipment. The workpiece is held stationary while the electron beam is programmed to cut the pattern. This contains 10 Multiple Choice Questions for Mechanical Engineering Unconventional Machining Process - 3 (mcq) to study with solutions a complete question bank. The whole process takes place in vacuum. a) vacuum chamber. A typical triode EBM gun functions in a manner very similar to an EBW gun. The extremely high pulse energy available with EBM explains the ability of the process to rapidly drill very deep and large-diameter holes. It consists in bombarding the work with accelerated ions which collide with the surface atoms of the work. As electron beam machining is grouped under the thermal category, it is natural to have thermal damages as part of the result. Burr free b. Household appliances: refrigerators, washing machines, air conditioners, etc. Meaning of Electron Beam Machining (EBM): In this process, the material is removed with the help of a high velocity (travelling at half the speed of light, i.e. The workpieces melt and flow together as the kinetic energy of the electrons is transformed into heat upon impact. This phenomenon has been well understood since the development of electron microscopy when attempts to use the electron beam as a machining tool were made. Shere the imforfation about mechanical engineering ( Mcq ) questions and answers ) they get scattered electron machining! Same as laser beam machining, the kinetic energy of the electron beam machining is a non-conventional process... In the order of 0.5-60 kW any shape EBM is a thermal machining process, some thermal remain! Density generally in the work chamber and a voltage of 50 to 200 kV helps accelerate! 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