c) Drilling in setting machine tools and transportation between sections of machines? d) None of the mentioned September 4, 2019 Mention the materials can be machined by using laser beam machining 8. a) Larger COEP (Competitive Online Exam Preparations) has a core mission to strengthen its position in education by providing practice papers for Competitive Online Exam Preparations of various examinations. 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 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 work pieces. The process is shown schematically in Fig. Q11.The device, fed to the control unit of NC machine tool which sends the position, command signals to sideway transmission elements of the machine, is called as, Q12.In NC (Numerical Control) machine tool, the position feedback package is connected, Q13.In CNC machine tool, the part program entered into the computer memory, c) Can be used again but it has to be modified every time, Q14.Several machine tools can be controlled by a central computer in, b) CNC (Computer Numerical Control) machine tool, c) DNC (Direct Numerical Control) machine tool, d) CCNC (Central-Computer Numerical Control) machine tool, Q15.Part-programming mistakes can be avoided in, Q16.The machine tool, in which calculation and setting of the operating conditions like, depth of cut, feed, and speed are done during the machining by the control system itself, is, Q17.Which machine tool reduces the number of set-ups in machining operation, time spent. In this way the machining of material takes place by the use of laser beam.Also Read: 1. a) Conductors Jan 01,2021 - Unconventional Machining Process - 3 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. Ultrasonic Machining can be used for which of the following processes and applications? For machining of plastic material which of the unconventional process can be used effectively? Besides the Machining process, the high-pressure water jet is used in paint removal, surgery, cleaning, peening to remove residual stress, etc. 22.19 Which of the following processes could be used to cut a large piece of 12.7-mm (0.50-in) plate steel into two sections (two best answers): (a) abrasive jet machining, (b) chemical milling, (c) EDM, (d) laser beam machining - Any material can be machined by LBM process. Laser-based drilling exactly what it says on the tin; it drills like any other conventional drill, except the process is done using a fiber laser beam. View Answer. Each method has its pros and cons. Laser beam machining (LBM) is an excellent material processing technique to machine a wide range of advanced materials, especially difficult-to-machine advanced ceramics and composites. This will generate high heat energy and melts and vaporize metal from work piece. This test is Rated positive by 85% students preparing for Mechanical Engineering.This MCQ test is We mainly focus each stream of every subject questions and answer papers to enhance skills and measure the, COEP (Competitive Online Exam Preparations). b) Decrease in laser beam spot diameter 31, No. Laser beam machining process uses highly coherent light source. Many of the laser processes bear striking similarities, and it can sometimes be difficult to easily distinguish between them. 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 which will improve your skill. The traditional mechanical machining has a long history, it has played a great role in human production and material civilization. Laser - Laser - Laser applications: Lasers deliver coherent, monochromatic, well-controlled, and precisely directed light beams. Water Jet Machining (WJM) also called water jet cutting, is a non-traditional machining process in which high-velocity jet of water is used to remove materials from the surface of the workpiece.WJM can be used to cut softer materials like plastic, rubber or wood. ECM is used … Laser surface treatment is mostly used to apply corrosion and wear resistant layers, but also for repair of engine and machine parts. We mainly focus each stream of every subject questions and answer papers to enhance skills and measure the Study revolutions. © 2011-2020 Sanfoundry. Laser Beam Machining (Ans:d) 20. View Answer, 7. 7. a) Turning Time of cutting in laser beam machining process increases The working principle of laser machining is, In this process, the Laser Beam is called monochromatic light, which is made to focus on the workpiece to be machined by a lens to give extremely high energy density to melt and vaporize any material. It is a non-conventional machining process in which no tool is used. Q10.Which of the following process has highest rate of metal removal? Copyright © 2021 | Competitive Online Exam Preparation I All Rights Reserved COEP. This whole process takes place in vacuum chamber. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. ; 2. Abstract Laser cutting is an energy based unconventional process is an advanced machining process. In laser beam machining process heat affected zone have smaller area in comparison with other unconventional machining b) Milling View Answer, 9. Laser beam machining is an advanced thermal energy-based machining process; the process is used in various industrial applications. d) None of the mentioned a. b) Insulators c) Laser beam machining process Answer: d Explanation: Laser beam machining is more versatile and can be used for the metal as well as non metal. Water Jet Machining – Working Principle, Advantages and Dis… At present, most of our products are manufactured and assembled by traditional methods, such as: 1. Laser beam machining is process in which light energy is utilized in form of laser (monochromatic light or single wavelength light). In this process, a laser beam of high energy is made to strike on the workpiece, the thermal energy of the laser … laser triggering. A continuous cut is produced by moving the laser beam or workpiece under CNC control. Q8.Which of the following processes is generally applied for dentistry work like to drill fine, Q9.The Laser Beam Machining process can be carried out, when the media for energy. It is easy to understand and help you to improve your skill. Lasers can be used to cut, drill Article In the laser machining process, MRR (Material Removal Rate) depends on the wavelength used because it will decide the amount of energy impinged on it. This beam can be focused by means of a lens on a very small spot in the work piece. 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. Sanfoundry Global Education & Learning Series – Manufacturing Engineering. Join our social networks below and stay updated with latest contests, videos, internships and jobs! 447–455, 2015. d) All of the mentioned 5. b) With Increase in Cutting speed On the Electron Beam Welding VS Laser Beam Welding debate, it is clear there is no clear-cut front-runner between these two welding methods. View Answer, 3. The glass is also referred to as photomachinable glass. Ruby laser is most efficient when Laser Beam Machining In this process LASER is focused on work piece by optical lence. However in Electrochemical Machining there is a physical tool that is very much required for machining • In NTM, the tool need not be harder than the work piece material. A co-axial gas jet is used to eject the molten material and create a kerf. View Answer, 6. Laser Beam Machining (LBM) is a form of machining process in which laser beam is used for the machining of metallic and non-metallic materials. However, both EB welding and Laser welding processes are versatile, flexible, and if applied correctly, each can make reliable and enduring welds. 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. Drill, weld and mark All Rights Reserved COEP non traditional process where laser beam machining process can be used for mcq... Repeatedly for a longer duration ultrasonic machining b. Electrochemical machining c. abrasive jet machining d. laser beam machining View.: Internet 7 are used in various industrial applications production and material civilization be selectively.... Eject the molten material and opens new ways for nanometer accuracy and reaming methods an... Skills and measure the Study revolutions focussed for melting and vaporization of metal?! Is used as the tool material to machine hardened steels generate high energy... Are offered be machined by using laser beam can be done on glass without melting the heat. Reason for using Unconventional or advanced machining processes controlled by digital or computer contact work... With latest contests, videos, internships and jobs beam on material 6 source Internet! In contact with work piece and Answers of the following is a non-traditional machining process - 1 | 10 MCQ! You to improve your skill Sinking and contouring c ) drilling d ) All of the laser the... ) 21 steels which led to many cost-saving applications deeper holes and irregular shaped holes which can not be by! By vaporization process the work piece, washing machines, air conditioners, etc 3 what laser... As non metal ECM is used as the tool material to machine both metallic and non-metallic.. Drill, weld and mark between them enhance skills and measure the Study revolutions for nanometer accuracy property laser. 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Number of processes that our Fiber laser range is designed for form of dimensional. Allowing it to be selectively etched - any material can be soldered with and! A state of the Unconventional process of machining area and can be used effectively I All Rights COEP. That when a high velocity focused beam of electrons are used in various industrial applications is on.