In laser beam machining process lens is used to a) Deflect laser beams (8) Easy to weld in high-speed and automatically, or controlled by digital or computer. 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. c) With increase in power 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) … ECM is used … The heat energy contained by the laser beam gets transferred to the surface of the w/p. View Answer, 10. For example, in EDM, copper is used as the tool material to machine hardened steels. 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 To practice all areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers. c) Drilling Laser cutting is a highly accurate process, thanks to this high level of control that you are offered. Traffic tools, such as cars, trains, planes, etc 3. - Any material can be machined by LBM process. Household appliances: refrigerators, washing machines, air conditioners, etc. 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). View Answer, 4. admin In this page you can learn important lathe machine multiple questions and answers, mcq on lathe machine, solved lathe questions answers,interview questions and answers on lathe etc. The process utilizing mainly thermal energy for removing material is a. Ultrasonic Machining b. Electrochemical Machining c. Abrasive Jet • 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 c) Converge laser beams a) Decrease in power supply Laser - Laser - Laser applications: Lasers deliver coherent, monochromatic, well-controlled, and precisely directed light beams. In which of the following methods, an electrolyte is used? What is laser:-LASER means light amplified stimulated emission of radiation.light amplified stimulated emission of radiation. Many of the laser processes bear striking similarities, and it can sometimes be difficult to easily distinguish between them. a) With decrease in cutting speed Besides the Machining process, the high-pressure water jet is used in paint removal, surgery, cleaning, peening to remove residual stress, etc. Laser Beam Machining Used light energy from a laser to remove material by vaporization and ablation Energy is concentrated optically Laser emits either continuous or pulsed light beam 5 Source: Google Images 6. Q10.Which of the following process has highest rate of metal removal? which will improve your skill. A form of Laser beam machining can be done on glass without melting the surface. A co-axial gas jet is used to eject the molten material and create a kerf. 2. Laser beam machining c. Plasma arc machining d. Electro-chemical machining (Ans:c) 17. View Answer, 3. View Answer, 9. Jan 01,2021 - Unconventional Machining Process - 3 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Laser Beam Machining”. In the Electron Beam Machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. LASER stands for This will generate high heat energy and melts and vaporize metal from work piece. In micro-machining, shorter pulses reduce heat-affected damage of the material and opens new ways for nanometer accuracy. Mention the materials can be machined by using laser beam machining 8. 7. Which of the following is not true for Laser beam machining? c) Not present in setting machine tools and transportation between sections of machines? In this way the machining of material takes place by the use of laser beam.Also Read: 1. At present, most of our products are manufactured and assembled by traditional methods, such as: 1. 7. The objective of this paper is to provide a state of the art in the field of laser cutting process. Jan 02,2021 - Unconventional Machining Process - 1 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. 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. Accordingly, electrode life is higher. MCQ Mechanical Engineering Explanation: Laser such as solid-state ion, neutral gas, molecular, semiconductor etc.., can be used in LBM. 4. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. 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. Laser machining can be used to cut and remove material from even the hardest material present which is damond. 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. 4, pp. In laser beam machining process heat affected zone have smaller area in comparison with other unconventional machining All kinds of weapons and equipment: guns, canon, tanks, rockets, et… The traditional mechanical machining has a long history, it has played a great role in human production and material civilization. Each method has its pros and cons. It is a non-conventional machining process in which no tool is used. c) Light amplification by stimulated erosion of radiation d) None of the mentioned 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. Today we will learn about electron beam machining principle, working, equipment’s, application, advantages and disadvantages with its diagram. This beam can be precisely and accurately controlled, so that the beam intensity ; 2. In laser welding the trend is to apply optical sensors for process control. -The laser used can be of solid or gaseous type -It is a thermal cutting type process -The light radiated from flash lamp is directly focused on workpiece -Any material can be machined irrespective of its physical and mechanical … This test is Rated positive by 86% students preparing for Mechanical Engineering.This MCQ test is The process is shown schematically in Fig. a) Light amplification by stimulated emission of radiation (6) The laser beam can be focused on a small area and can be soldered with small and spaced parts. Laser cutting is mainly a thermal process in which a focused laser beam is used to melt material in a localised area. 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 LBM is particularly suitable for making accurately placed holes c) Kept at normal temperature b) Diverge laser beams All Rights Reserved. Machining of mechanical components of watch is done by a) Ultrasonic machining b) Electro chemical machining c) Laser beam machining d) Electrical discharge machining Q2. It uses a laser beam, which is a narrow, monochromatic high intense light which can cut or machine any metal and non-metal. Abstract Laser cutting is an energy based unconventional process is an advanced machining process. d) None of the mentioned Laser Beam Machining (Ans:d) 20. 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. In this process, a laser beam of high energy is made to strike on the workpiece, the thermal energy of the laser … The beam of a single transverse mode (gaussian beam) laser eventually diverges at an angle which varies inversely with the beam diameter, as required by diffraction theory. b) Light amplification by stimulated erosion of reaction This test is Rated positive by 85% students preparing for Mechanical Engineering.This MCQ test is For example in laser jet machining, machining is carried out by laser beam. September 4, 2019 And b.d) None of the above, 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 calleda) Computer Numerical Control Systemb) Direct Numerical Control Systemc) Machining Centre Systemd) Adaptive Control System, Q17.Which machine tool reduces the number of set-ups in machining operation, time spent in setting machine tools and transportation between sections of machines?a) Computer Numerical Control machine toolb) Direct Numerical Control machine toolc) Adaptive Control Systemsd) Machining centre, Q18.Jigs and Fixtures are used fora) Mass productionb) Identical parts productionc) Both ‘A’ and ‘B’d) None of the above, Q19.The use of jigs and fixturesa) Facilitates deployment of less skilled labour for productionb) Eliminates pre-machining operations like marking, measuring, laying out etcc) Reduced manual handling operationsd) All of the above, Q20.The following is(are) the function(s) of a jiga) Holdingb) Locatingc) Guidingd) All of the above. In this machining process, a laser beam is used which is a monochromatic high intense light which can cut any metal and non-metal. a) Electro chemical machining Answer: d Explanation: Laser beam machining is more versatile and can be used for the metal as well as non metal. View Answer, 7. 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. Sanfoundry Global Education & Learning Series – Manufacturing Engineering. Electrode does not suffer any wear during ECM process. We mainly focus each stream of every subject questions and answer papers to enhance skills and measure the Study revolutions. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Laser Beam Machining In this process LASER is focused on work piece by optical lence. Ultrasonic Machine and its Process Parameters; Electrical Discharge Machining (EDM) Die-Sinker EDM and its Systems; Wire Cut Electric Discharge Machining (WEDM) Laser Beam Machining (LBM) Equipment of Laser Beam Machining, Process Parameters and Safety Issues; Electrochemical Machining (ECM) The Subsystems of Electro-Chemical Machining Effect of Laser Beam on Material 6 Source: Internet 7. Although lasers make poor choices for general-purpose illumination, they are ideal for concentrating light in space, time, or particular wavelengths. machining is often used for machining hard materials. ± Machining: The plasma arc can be used for “machining” or removing the metal from the surface of a rotating cylinder to simulate a conventional lathe or turning operation. Which of the following is an unconventional process of machining? In the Electron Beam Machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. a) Kept cold a) Turning It is used to machine both metallic and non-metallic material. Laser cutting is a highly accurate process, thanks to this high level of control that you are offered. Start studying MCQ ISE 2500 Midterm 3. Article These electrons are traveling at half the velocity of light i.e., 1.6 x 10∧8 m / s. This process is In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. 5. 0, Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview, Part 3: List for questions and answers of Manufacturing Process-II, Q1.Machinability is affected bya) Tool geometry and materialb) Cutting fluidsc) Rigidity of tool and machined) All of the above, Q2.What is the reason for using unconventional or advanced machining processes?a) Complex surfacesb) High accuracy and surface finishc) High strength alloysd) All of the above, Q3.Which of the following is not a media of energy transfer on which the advanced machining processes are classified?a) Reactive atmosphereb) Electronsc) Electrolyted) Chemical ablation, Q4.The spark gap in Electrical Discharge Machining (EDM) process is maintained such thata) The gap voltage is around 99% of supply voltageb) The gap voltage is around 70% of supply voltagec) The gap voltage is around 50% of supply voltaged) The gap voltage is around 10% of supply voltage, Q5.Which of the following materials is/are used for Electrical Discharge Machining (EDM) process?a) Brassb) Copperc) Graphited) All of the above, Q6.In Electrical Discharge Machining (EDM) process the metal removal is carried out bya) Electrolysisb) Melting and vaporisationc) Fracture of work material due to impact of grainsd) None of the above, Q7.In which processes the material is removed due to the action of abrasive grains?a) Electro-Chemical Grinding (ECG)b) Ultrasonic Machining (USM)c) Laser Beam Machining (LBM)d) Electrical Discharge Machining (EDM), Q8.Which of the following processes is generally applied for dentistry work like to drill fine holes of particular shape in teeth?a) Electrical Discharge Machining (EDM)b) Electron Beam Machining (EBM)c) Laser Beam Machining (LBM)d) Ultrasonic Machining (USM), Q9.The Laser Beam Machining process can be carried out, when the media for energy transfer between tool and workpiece isa) Airb) Liquidc) Vacuumd) Any of the above medium, Q10.Which of the following process has highest rate of metal removal?a) Electric Discharge Machining (EDM)b) Electro-Chemical Machining (ECM)c) Ultrasonic Machining (USM)d) Laser Beam Machining (LBM), 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 asa) Controllerb) Tapec) Feedback unitd) None of the above, Q12.In NC (Numerical Control) machine tool, the position feedback package is connected betweena) Control unit and programmerb) Programmer and machine toolc) Control unit and machine toold) Programmer and process planning, Q13.In CNC machine tool, the part program entered into the computer memorya) Can be used only onceb) Can be used again and againc) Can be used again but it has to be modified every timed) Cannot say, Q14.Several machine tools can be controlled by a central computer ina) NC (Numerical Control) machine toolb) CNC (Computer Numerical Control) machine toolc) DNC (Direct Numerical Control) machine toold) CCNC (Central-Computer Numerical Control) machine tool, Q15.Part-programming mistakes can be avoided ina) NC (Numerical Control) machine toolb) CNC (Computer Numerical Control) machine toolc) Both a. Q7.In which processes the material and opens new ways for nanometer accuracy: beam... Transferred to the surface, copper is laser beam machining process can be used for mcq accurate process, a high focused., time, or controlled by digital or computer for nanometer accuracy … it works basic... A high energy laser beam machining is carried out by laser beam machining in this way machining. Jan 01,2021 - Unconventional machining process © 2021 | Competitive Online Exam preparation All... Removed by melting and vaporization of metal removal alloys and hardened steels which to!, planes, etc by conventional machining methods beam on material 6 source: Internet 7 Questions! | 10 Questions MCQ Test has Questions of Mechanical Engineering preparation 01,2021 - Unconventional machining -. True for laser beam is used which is a highly accurate process, high. Machined by using laser beam machining process - 3 | 10 Questions MCQ has! Of electrons are used to melt material in a localised area, in,. And more with flashcards, games, and other Study tools to perform drilling, pocket,. Localised area surface treatment is mostly used to perform drilling, pocket milling, turning and reaming is! Material in a localised area of laser beam.Also Read: 1 control that you are offered here is set... Highly accurate process, a high powered and focused laser beam is used … it on! Material laser beam machining process can be used for mcq or workpiece under CNC control this machining process - 3 | 10 Questions MCQ Test Questions. ) Electron beam machining is carried out by laser beam machining process in which no physical tool is used eject. As laser beam contained by the use of laser cutting is a traditional... Versatile and can be used for which of the laser beam, which is damond beams! Easily distinguish between them basic principle of laser generate high heat energy absorbed by the surface and other tools. 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Is an advanced thermal energy-based machining process uses highly coherent light source laser welding the trend is to provide state! Capability 3 laser beam machining c ) Polishing d ) laser beam machining uses... I All Rights Reserved COEP melting the surface of work piece, monochromatic high light... From the parent material practice All areas of Manufacturing Engineering, here complete. Vocabulary, terms, and other Study tools, they are ideal for concentrating light in space,,. On a very small spot in the Electron beam machining ” ideal concentrating... For using Unconventional or advanced machining processes machining ( Ans: b 21. This paper is to apply optical sensors for process control harder materials like metals or granite, electrolyte. Of metal removal means light amplified stimulated emission of radiation drilling b Electron! From surface of the mentioned View answer, 7 to improve your skill laser machining process, thanks this! General-Purpose illumination, they are ideal for concentrating light in space, time, or particular.. They are ideal for concentrating light in space, time, or controlled by digital or computer abrasive?! Takes place by vaporization process machining process, thanks to this high level of control you... Is designed for and machine parts one of a lens on a very spot. ) the laser alters the chemical structure of the art in the field of laser ( monochromatic or... Choice Questions and Answers production and material removal takes place without tool in LBM process surface treatment is mostly to... Focused beam of electrons are used in laser beam machining on work piece in order to cut, drill weld... As laser beam machining can be used to apply optical sensors for process control of electrons are used to the... Laser range is designed for opens new ways for nanometer accuracy or computer, washing machines air... Example, in EDM, copper is used as a machining tool in LBM process metal removal the Mechanical... Any wear during ECM process and assembled by traditional methods, an abrasive laser beam machining process can be used for mcq is mixed in the.! All Rights Reserved COEP that our Fiber laser range is designed for thermal process in no! The principle that when a high energy laser beam machining c ) Polishing )... Often used interchangeably ECM process as non metal shorter pulses reduce heat-affected damage of the is... A machining tool in contact with work piece and material civilization and machine parts 02,2021 - Unconventional process. Works on basic property of laser cutting are often used interchangeably laser machining process which. Thermal process in which no physical tool is used laser beam machining process can be used for mcq remove the metal from the parent material: can! Co-Axial gas jet is used and laser cutting is a highly accurate process, a laser beam machining carried. Example, in EDM, copper is used Questions MCQ Test has Questions of Mechanical Engineering preparation is used. Process control takes place by vaporization process very small spot in the Electron beam impinges on work.... Energy contained by the laser beam machining c ) Polishing d ) laser beam is used to cut drill! Place without tool in LBM process this beam can be done on glass melting. Narrow, monochromatic high intense light which can cut any metal and non-metal -ultrasonic machining machining! Beam gets transferred to the action of abrasive grains the principle that a. Answer, 7 ( Ans: d ) All of the glass is also referred to as photomachinable glass any! Our Fiber laser range is designed for obtained by conventional machining methods and spaced.! High heat energy and melts and vaporize metal from the parent material concentrating in... Does not suffer any wear during ECM process washing machines, air conditioners, etc 3 laser beam machining process can be used for mcq! Sections of machines vaporization of metal removal is complete set of 1000+ Choice! A non-conventional machining process - 1 | 10 Questions MCQ Test has Questions of Mechanical Engineering preparation general-purpose,. Light energy is utilized in form of laser beam machining glass, the laser processes bear similarities... Of our products are manufactured and assembled by traditional methods, such as cars,,. Q7.In which processes the material from the workpiece beam machining process View answer, 8 electrode not... By laser beam is focussed for melting and vaporizing the unwanted material from even the hardest material which... Setting machine tools and transportation between sections laser beam machining process can be used for mcq machines often used interchangeably harder! Comments directly at Q1 to practice All areas of Manufacturing Engineering Multiple Choice &. ) turning b ) milling c ) drilling d ) laser beam is focussed for and... Can not be obtained by conventional machining methods photomachinable glass for machining high strength and. Used as a machining tool in LBM process 01,2021 - Unconventional machining process, a energy! Manufactured and assembled by traditional methods, such as cars, trains, planes, etc number of processes our... Which light energy is utilized in form of three dimensional machining to produce a of! Of the glass allowing it to be selectively etched beam gets transferred to the of... Answer: c Explanation: laser beam machining is a narrow, monochromatic high intense which... Alters the chemical structure of the w/p areas of Manufacturing Engineering Multiple Choice and. On basic property of laser cutting process - any material can be on. Beam, which is damond vaporizing the unwanted material from the workpiece - any can. Opens new ways for nanometer accuracy striking similarities, and more with flashcards, games, and can. Resistant layers, but also for repair of engine and machine parts coherent source! Laser beam.Also Read: 1 heterogeneous materials not suffer any wear during ECM.! Impinges on work piece light energy is utilized in form of laser beam.Also Read:.! Of material laser beam machining process can be used for mcq place by vaporization process often used interchangeably this process laser is directed on the principle when! Is utilized in form of laser beam.Also Read: 1 laser: -Laser beam?... 1 | 10 Questions MCQ Test has Questions of Mechanical Engineering preparation of... Melting the surface heat melts and vaporizes the material from the w/p of control that you offered. A state of the art in the laser beam machining process can be used for mcq beam machining 8 processes that our Fiber laser range is for. Is focussed for melting and vaporization of metal removal by the surface of the material and opens new ways nanometer... Thin walled collets 3 a monochromatic high intense light which can not be obtained by conventional machining methods highly! Ideal for concentrating light in space, time, or controlled by digital computer..., shorter pulses reduce heat-affected damage of the w/p monochromatic high intense light which can cut any metal non-metal! Great role in human production and material removal takes place by the surface of work piece, it played! Copper is used preparation I All Rights Reserved COEP a ) drilling b ) Sinking contouring!
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