d) None of the mentioned Q2.What is the reason for using unconventional or advanced machining processes? View Answer, 5. Answer: c Explanation: ECM can be used for machining high strength alloys and hardened steels which led to many cost-saving applications. c) Not present In laser beam machining process heat affected zone have smaller area in comparison with other unconventional machining c) With increase in power You can control the beam intensity, length and heat output depending on the material you are working with, and can also user a mirror or special lens to further focus the laser beam. All kinds of weapons and equipment: guns, canon, tanks, rockets, et… 22.18 Which one of the following processes would be appropriate for cutting a hole of 0.075 mm (0.003 in) diameter through a plate of aluminum that is 1.6 mm (1/16 in) thick: (a) abrasive jet machining, (b) chemical milling, (c) EDM, (d) laser beam machining, (e) … a) Electro chemical machining 1. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. - Any material can be machined by LBM process. - A high powered and focused laser beam is used as a machining tool in LBM process. A similar setup used for drilling can also be used for high-speed scribing on these ceramics, where a single pulse is used to machine a blind hole into the material, with an appropriate pulse-to-pulse spacing (99.6 2 The traditional mechanical machining has a long history, it has played a great role in human production and material civilization. The high power radiation of laser gives rise to c) Metals (6) The laser beam can be focused on a small area and can be soldered with small and spaced parts. This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Laser Beam Machining”. This machining process works on basic property of laser. MCQ Mechanical Engineering Sanfoundry Global Education & Learning Series – Manufacturing Engineering. Traffic tools, such as cars, trains, planes, etc 3. - The machining carried out by an intense and unidirectional beam of light provided by laser, is called as Laser Beam Machining (LBM) process. a) With decrease in cutting speed c) Drilling Besides the Machining process, the high-pressure water jet is used in paint removal, surgery, cleaning, peening to remove residual stress, etc. Time of machining in the laser beam machining process increases with For example, laser drilling and laser cutting are often used interchangeably. admin Which of the following is a conventional process of machining? machining is often used for machining hard materials. For machining of plastic material which of the unconventional process can be used effectively? ECM can be used for slotting very thin walled collets 3. -Ultrasonic Machining -Electrochemical Machining -Abrasive Jet Machining -Laser Beam Machining Which of the following is not true for Laser beam machining? b) Insulators d) Laser beam machining process Explanation: Laser such as solid-state ion, neutral gas, molecular, semiconductor etc.., can be used in LBM. a) Conductors A continuous cut is produced by moving the laser beam or workpiece under CNC control. The objective of this paper is to provide a state of the art in the field of laser cutting process. a) Computer Numerical Control machine tool, a) Facilitates deployment of less skilled labour for production, b) Eliminates pre-machining operations like marking, measuring, laying out etc, Q20.The following is(are) the function(s) of a jig, examinations. Thus, the "pencil beam" directly generated by a common helium–neon laser would spread out to a size of perhaps 500 kilometers when shone on the Moon (from the distance of the earth). a) Light amplification by stimulated emission of radiation In laser beam machining process lens is used to It is a non-traditional machining process in which no physical tool is used. Q1. Laser machining can be used to cut and remove material from even the hardest material present which is damond. Electrode does not suffer any wear during ECM process. View Answer, 2. ECM can be used for copying of internal and external surfaces, cutting of curvilinear slots, machining of intricate patterns, production of long curved profiles, machining of b) With Increase in Cutting speed View Answer. In which of the following methods, an electrolyte is used? Laser Beam Machining In this process LASER is focused on work piece by optical lence. d) None of the mentioned List out the applications of Laser Beam Machining Article Q7.In which processes the material is removed due to the action of abrasive grains? Laser Beam Machining (Ans:d) 20. ECM is used … Laser beam machining (LBM) is one of the most widely used thermal energy based non-contact type advance machining process which can be applied for almost whole range of materials. LASER BEAM MACHINING(LBM)PROCESS 1. 4. a) Deflect laser beams In laser welding the trend is to apply optical sensors for process control. Laser-beam machining is a thermal material-removal process that utilizes a high-energy, coherent light beam to melt and vaporize particles on the surface of metallic and non-metallic workpieces. Title: LASER BEAM MACHINING 1 LASER BEAM MACHINING. It is a non-conventional machining process in which no tool is used. Water Jet Machining – Working Principle, Advantages and Dis… d) Laser beam machining process Laser drilling is just one of a number of processes that our Fiber Laser range is designed for. Same electrode can be used repeatedly for a longer duration. The laser used can be of solid or gaseous type b. Which types of lasers are used in Laser beam machining? It is easy to understand and help you to Lasers can be used to cut, drill The preferred abrasive material in AJM is In the Electron Beam Machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. Answer: d Explanation: Ultrasonic Machining can be used for drilling holes, sinking, contouring and many more wide variety of … Ultrasonic Machining can be used for which of the following processes and applications? View Answer, 3. • Machining is the broad term used to describe removal of material from a workpiece • Includes Cutting, Abrasive Processes (grinding), Advanced Machining Processes (electrical, chemical, thermal, hydrodynamic, lasers) A form of Laser beam machining can be done on glass without melting the surface. in setting machine tools and transportation between sections of machines? View Answer, 9. Jan 02,2021 - Unconventional Machining Process - 1 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. • Machining is the broad term used to describe removal of material from a workpiece • Includes Cutting, Abrasive Processes (grinding), Advanced Machining Processes (electrical, chemical, thermal, hydrodynamic, lasers) • Automation began when lathes were introduced in 1700s • Now have computer numerical control (CNC) machines Many of the laser processes bear striking similarities, and it can sometimes be difficult to easily distinguish between them. View Answer, 7. LBM is particularly suitable for making accurately placed holes Lasers can be used to cut, drill, weld and mark. The process utilizing mainly thermal energy for removing material is a. Ultrasonic Machining b. Electrochemical Machining c. Abrasive Jet 4.3.39 and materials are removed in the form of three dimensional machining to produce a groove of desired shapes [23]. Jan 02,2021 - Unconventional Machining Process - 1 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. 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. Laser cutting is mainly a thermal process in which a focused laser beam is used to melt material in a localised area. Used light energy from a laser to remove material by vaporization Energy is concentrated optically Thermal and Optical energy is used in this process Light beam pulsed so that the released energy results in an impulse against the work surface, producing evaporation and melting 3 Source: Google These electrons are traveling at half the velocity of light i.e., 1.6 x 10∧8 m / s. This process is best suited for the micro-cutting of materials. This test is Rated positive by 86% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. LASER stands for This will generate high heat energy and melts and vaporize metal from work piece. Which of the following is not true for Laser beam machining? 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