c) Rubber “In Abrasive jet machining, commercial grades powders can be used for machining.” a) Vaporization While nozzles of sapphire last for about 300 hours of operation when used with 27-micron abrasive powder. View Answer, 12. The material removal rate is slow and its application is therefore limited. Abrasive jet machining : Download: 5: Water jet cutting and Abrasive water jet machining: Download: 6: Magnetic abrasive finishing: Download: 7: Abrasive Flow Finishing: Download: 8: Magnetorheological Finishing: Download: 9: Magnetorheological Abrasive Flow Finishing (Part I) Download: 10: Magnetorheological Abrasive Flow Finishing (Part II) Download: 11: Magnetorheological Abrasive … Abrasive Water Jet Machining (AWJM) is one of the non-conventional machining processes which make use of high water pressure to be converted into jet of high velocity mixed with abrasive particles. In AJM, which of the following materials are used as abrasive grains? The disadvantages of the process lie in the following: That’s it, thanks for reading. View Answer, 8. The fundamental principle of Abrasive jet machining involves the use of a high-speed stream of abrasive particles carried by a high-pressure gas or air on the work surface through a nozzle. Powder blasting, or abrasive jet machining, is a technique in which a particle jet (typically Al 2 O 3 particles of 3–30 μm) is directed toward a target for mechanical material removal. The gases used are nitrogen, carbon dioxide or clean air. c) Automated Jet Machining State whether the following statement is true or false. Gas Supply: Gas is supply to the system for the operation. It also used to reduce noise associate with WJM. You can... Spanners and It's Types The laser used can be of solid or gaseous type b. Abrasive Flow Machining AUTOFLOW: AFM at Its Best. b) Ceramics 1.In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) b) Air 1. In Abrasive jet machining, work piece material of removed by which of the following means? This outgoing high-speed stream of the mixture of gas and abrasive particles is known as abrasive jet. In this machining process a focus stream of abrasive particles are forces to impinge on work piece at high velocity. a) 10 – 40 µm Glass beads of diameter 0.30 to 0.60 mm are used for light polishing and deburring. a) Cam drives This process can be advantageously utilized for surface cleaning, coating removing, deflashing, trimming, engraving, deburring, drilling, parting, ceramic abrading, glass frosting, etc. 11. Filter: Filter indicates the cleanness of the fuel supply. 1. What are the processes where Abrasive jet machining can be used? This abrasive and gas mixture emerges from a small nozzle mounted on a fixture at a high velocity ranging from 150 to 300 m/min. Material removal is done with cutting speeds between 25 – 125 mm/min. a) Nitrogen Abrasive Jet Machining is also known as Abrasive micro blasting, Pencil blasting, or Micro Abrasive Blasting.. Abrasive Jet Machining is useful to form edge shapes or surface machining in hard, brittle, and temperature-sensitive material. Abrasive powder feed rate is controlled by the amplitude of vibration of the mixing chamber. c) 100 – 150 µm b) Abrasive Jet Machining b) Electro plating d) All of the mentioned This test is Rated positive by 87% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. View Answer, 4. d) All of the mentioned A typical material removal rate for abrasive jet machining is 16 mm/min in cutting glass. Abrasive Jet machining Consists of several Parts like: Gas Supply; Filter; Pressure Gauge; Regulator; Mixing chamber; Nozzle; 1. Explanation: No explanation is available for this question! Dec 27,2020 - Unconventional Machining Process - 1 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. High velocity stream of abrasive is generated by converting the pressure energy of the carrier gas or air to its kinetic energy and hence high velocity jet. d) All of the mentioned In this experimental investigation, waspaloy is used to analyse the kerf angle (KA), surface roughness (SR) and material removal rate (MRR) during abrasive water jet machining. a) Glass Their writers are highly professional, and always deliver orders on time. The machining accuracy is poor and the nozzle wear rate is high. What is the frequency of mixing chamber, consisting of gas and abrasives? b) Glass The metal is removed due to erosion caused by the abrasive particles impacting the work surface at high speed. What is the pressure of gas that is to be supplied, for carrying the abrasives? It is used for deburring, etching, and cleaning of brittle metals, alloys, and non-metallic materials. These high velocity abrasive particles remove metal by brittle fracture or erosion from work piece. Ability to cut fragile and heat-sensitive materials without damage as no heat is generated due to the passing of gas or air. c) Oxygen Controlling media flow characteristics during the abrasive flow machining process is critical to maintaining predictable results. c) decreases, becomes stable and then increases. These are generally made of... © Copyright 2020 TheEngineersPost.com - All Rights Reserved, Abrasive Jet Machining (AJM): Parts, Working Principle, Advantages & Applications, Working Principle of Abrasive Jet Machining, Types of Unconventional Machining Process [Manufacturing], What is TIG & MIG Welding: Difference Between TIG and MIG welding, What is Underwater Welding and types of Underwater welding?, Cams and Followers: How they Work? It is often used for cleaning and polishing of plastic, nylon and Teflon components, the frosting of the interior surface of the glass tubes, etching of markings on glass cylinders, etc. c) Any fluids Abrasive jet machining (AJM), also known as abrasive micro-blasting, pencil blasting and micro-abrasive blasting, is an abrasive blasting machining process that uses abrasives propelled by a high velocity gas to erode material from the workpiece. c) Mechanical abrasion The abrasives generally used are silicon carbide, aluminium oxide, glass powder or specially prepared sodium bicarbonate. c) Nitrogen a) Al2O3 The abrasive particles are held in a suitable holding device, like a tank and fed into the mixing chamber. View Answer, 2. Ability to cut intricate hole shapes in materials of any hardness and brittleness. High velocity jet is aimed at a surface under controller condition . Smaller sizes are used for good surface finish and precision work. In advanced machining processes, what is the full form of AJM? Waspaloy is often used in aviation combustion chamber at extreme environments. Read also: Types of Unconventional Machining Process [Manufacturing]. Nozzles have a great degree of abrasion wear, they are made of hard materials such as tungsten carbide or synthetic sapphire to reduce the wear rate. a) Automatic Jet Manufacturing The metal is removed due to erosion caused by the abrasive particles impacting the work surface at high speed. It has capability to cut a large variety of materials ranging from softer materials such as wood, plastics, etc. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Abrasive Jet Machining – Introduction and Machining system”. An abrasive is small, hard particle having sharp edges and an irregular shape . The drain and catcher system is used to remove debris and other machined particle form water. a) 10 – 40 µm b) 50 – 100 µm c) 100 – 150 µm d) 200 – 300 µm View Answer. Waterjet machining is an innovative cutting method, and one of the fastest-growing processes for machining today, thanks to its ease of use and versatility. It is another non traditional machining process where there is no contact between tool and the work piece. MCQ on Mechanical Energy Based Unconventional Machining Process. With repeated impacts, small bits of material get loosened and a fresh surface is exposed to the jet. An ever growing number of fabricators and machine shops are gaining a competitive advantage by incorporating abrasive waterjets to their machining mix. The process finds application in cutting slots, thin sections, contouring, drilling, for producing shallow crevices, deburring, and for producing intricate shapes in hard and brittle materials. Abrasive jet machining (AJM) is one of the advanced machining processes where a high velocity jet of abrasive is used to remove material from work surface by erosion. c) 50 Hz All Rights Reserved. This pipeline carries a pressure gauge and a regulator to control the gas flow and its pressure. View Answer, 14. a) 10 Hz a) CO2 a. air b. liquid c. vacuum d. any of the above medium. The AJM differs from sandblasting. What is Abrasive Jet Machining. 2. Home MCQ Production Engg Material properties and Metal Forming ... Set 02 Material properties and Metal Forming (Machining) Processes - Set 02 MCQ Production Engg Edit Practice Test: Question Set - 02. A. Abrasive jet machining (AJM) is a process that removes material by directing a high speed stream of abrasive particles onto a work piece. This is basic of water jet machining (WJM). On normal production work, the accuracy of +0.1 mm is easily held. © 2011-2020 Sanfoundry. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Water Jet Machining – Introduction and Machining system”. View Answer. Answer: a Explanation: Abrasive grains of size, between 10 – 40 µm can be used for machining. d) None of the mentioned Waspaloy is also a nickel-based superalloy with exceptional strength properties at a temperature of 980 °C. a. Surface finish with Ra values varies from 0.3 to 2.3 µm. Types, Nomenclature [Diagrams & PDF], 14 Types of Washers & How They Use? View Answer, 7. What is the full form of WJM in advanced machining processes? Answer Explanation ANSWER: any of the above medium. Presentation of-abrasive-jet-machining 1. d) Air Abstract- Abrasive Water Jet Machining (AWJM) is a versatile machining process primarily used to machine hard and difficult to machine materials. 8.5 Average quality score. This process is mainly employed for such machining works which are otherwise difficult, such as thin sections of hard metals and alloys, cutting of material which is sensitive of heat damage, producing intricate holes, deburring, etching, polishing etc. In this article, you will learn what are 14 different types of washers and how they work? Here the work is to clean the fuel if there are any dust particles present. In Abrasive jet machining, what may be the size of the abrasive grains used? To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. Sanfoundry Global Education & Learning Series – Advanced Machining. In Abrasive jet machining, what may be the size of the abrasive grains used? d) All of the mentioned d) Abrasive Jet Manufacturing Increases continuously B. Decreases continuously C. Decreases becomes stable and then increases D. Increases, becomes stable and then decreases Answer: Option D b) 50 – 100 µm a) True b) 2.0 to 8.0 kg /cm2 Apart from flow rate and size, types of abrasive also influence machining performance. The common particle sizes vary from 10 microns to 50 microns. It is a fast (typically, 500 μm depth in 20 min), inexpensive, and accurate directional etch technique for brittle materials like glass, silicon, and ceramics. 2 Abrasive Jet Machining 2.0 INTRODUCTION In abrasive jet machining, a focused stream of abrasive particles, carried by high pressure air or gas is made to impinge on the work surface through a nozzle and work material is removed by erosion by high-velocity abrasive particles. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate. b) CO2 d) All of the mentioned Saif M. is a Mechanical Engineer by profession. 3. to harder materials such as Inconel. View Answer, 13. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. Such abrasives must have sharp edges for smooth micro-cutting and must be sufficiently hard so that they don’t break during impact. While most professionals in the manufacturing industry have heard of waterjets, they may not realize there are actually two distinct forms of this process available. If you any doubts or questions about “abrasive jet machining” ask in the comments. Thank you so much team Pro Homework Help! Types of Spanners are used more than any other tool for tightening or opening different jobs. Balasubramaniam, J. Krishnan, (1998) Examined the abrasive jet de-burring process parameters and the edge nature of abrasive jet de-burred parts. A typical set-up for abrasive jet machining is shown in the figure. He is also an author and editor at theengineerspost.com. View Answer, 11. It is the material removal process where the material is removed by high velocity stream of air/gas or water and abrasive mixture . In Abrasive Jet Machining (AJM), abrasive particles are made to impinge on the work material at a high velocity. a) Cleaning In abrasive jet machining, kinetic energy of high velocity (100 – 300m/s) abrasive jet is utilized to remove work material by impact erosion. with [Pictures & PDF], 12 Types of Spanners and Their Uses [with Pictures] PDF. d) 200 – 300 µm What are the processes where Abrasive jet machining can be used? _____ is a non-traditional machining processes that depends on the eroding effects of different reagents. Drain and Catcher. I would have failed my psychology course if it wasn’t for these guys. Which of the following is not true for Laser beam machining? The process parameters are chosen as abrasive flow rate, pressure, and standoff distance. WHAT IS ABRASIVE JET MACHINING ? Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. This test is Rated positive by 92% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. In machining system of AJM, what is/are the gas/es used for carrying the abrasives? b) False If you found this article helpful share with your friends. To control the size and shape of the cut either the workpiece or the nozzle is moved by cams, pantographs or other suitable mechanisms. View Answer, 10. In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. View Answer, 3. b) SiC What used to be known in the 80s as a rather obscure, albeit fascinating, cutting method has gone mainstream. Polishing of plastic, Nyon can be done easily. Here we also use compressed air instead of other gas. View Advanced Machining Sheet.pdf from VIBRATION MED 101 at Engineering College. While larger sizes are used for rapid removal rate. c) Glass beads In this post, you learn abrasive jet machining its working principle, parts, applications, advantages and disadvantages. Masks, which are used to confine the jet stream location on work piece are made of, which type of materials? Advanced Manufacturing Processes Part One MCQ Choose the correct answer 1- Abrasive jet machining … In addition to the above abrasives, dolomite (calcium magnesium carbonate) of 200 grit size is found suitable for light cleaning and etching. b) 30 Hz Abrasive jet machining is a non-traditional machining process which is mostly used in machining of hardened metals. Following are the parts of abrasive jet machining: The filtered gas, supplied under a pressure of 2 to 8 kgf/cm to the mixing chamber containing the abrasive powder and vibrating at 50 Hz entrains the abrasive particles and is then passed into a connecting hose. View Answer, 9. a) Copper In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? d) All of the mentioned Nozzles made of tungsten carbide have an average life of 8 to 12 hours. Abrasive Jet Machining writers available to do this job. c) Deburring View Answer, 5. Which type of materials can be machined using Abrasive jet machining? The gas flow and pressure is controlled by a pressure regulator. c) Trace mechanisms b) Cutting Electrochemical Machining c. Abrasive Jet Machining d. Laser Beam Machining (Ans:b) 21. d) increases, becomes stable and then decreases . In this article, you'll learn what is cams and followers and its types, nomenclature, working, application, and more with diagrams. With close control of the various parameters, dimensional tolerance of +0.05 mm can be obtained. The jet of abrasive particles is carried by carrier gas or air. Dec 26,2020 - Unconventional Machining Process - 3 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. The fragile material can be easily machined. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. a)increases continuously. a) Liquids a) Water Jack Manufacturing b) Water Jet Machining c) Water Jet Manufacturing d) Water Jack Manufacturing View Answer The fundamental principle of Abrasive jet machining involves the use of a high-speed stream of abrasive particles carried by a high-pressure gas or air on the work surface through a nozzle. c) 10.0 to 18.0 kg/cm2 View Answer, 6. These particles mic in the gas stream, travel further through a hose and finally pass through the nozzle at a considerably high speed. In machining system of AJM, which is the medium of carrying the abrasive grains for machining? d) Corrosion Common uses include cutting heat-sensitive, brittle, thin, or hard materials. The metal removal rate depends upon the diameter of the nozzle, the composition of the abrasive gas mixture, the hardness of abrasive particles and that of work material, particle size, the velocity of jet and distance of the workpiece from the jet. It separate metal particle from water and this water is further send to reservoir. b) decreases continuously. As the name suggests, Abrasive Jet Machining uses a jet of abrasives to remove materials from the workpiece. a) 0.1 to 1.0 kg/cm2 The objective of this paper is to optimize material removal rate and kerf width simultaneously using AWJM process on INCONEL 718. Additional cleaning of the work surface may occur as there is a possibility of sticking abrasive grains in softer materials. 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. Which of the following gas, should never be used as the carrier of abrasives? d) 25.0 to 35.5 kg/cm2 Normally inaccessible portions can be machined with fairly good accuracy. b) Gases c) Hard materials Participate in the Sanfoundry Certification contest to get free Certificate of Merit. If abrasive water jet machining is used, abrasive particles mixed in water stream before entering into nozzle. d) 70 Hz here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – WJM – Advantages and Disadvantages, Next - Advanced Machining Questions and Answers – AJM – Material Removal Rate and Process parameters, Machine Design Questions and Answers – Levers, Machine Design Questions and Answers – Fracture Mechanics, Curved beams & Thermal Stresses, Mechanical Engineering Questions and Answers, Engineering Materials and Metallurgy Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Machine Tools & Machining Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Advanced Machining Processes Questions and Answers, Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Advanced Machining Questions and Answers – Electronbeam Machining-Introduction, Equipment and Material removal, Advanced Machining Questions and Answers – AWJM – Process Capabilities, Advanced Machining Questions and Answers – Electro Chemical Machining-Introduction and Principle of electrolysis, Advanced Machining Questions and Answers – Non Traditional Machining, Advanced Machining Questions and Answers – Plasma Beam Machining-Introduction And Machining system, Advanced Machining Questions and Answers – MAF – Applications, Advanced Machining Questions and Answers – Water Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Ion Beam Machining-Introduction, Material Removal Rate, Advanced Machining Questions and Answers – AJM – Material Removal Rate and Process parameters, Advanced Machining Questions and Answers – Ultrasonic Machining – Introduction, Advanced Machining Questions and Answers – Traditional Machining, Advanced Machining Questions and Answers – USM – Factors Affecting MRR. 1. A regulator is incorporated in the line to control the flow of abrasive particles compressed air or high-pressure gas is supplied to the mixing chamber through a pipeline. Water is used as abrasive in such machining . and their uses with pictures. b) Pantographs High velocity of (water mixed with abrasive) is projected on the work piece which causes abrasive action and deformation of work piece takes place. 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. The mixing chamber, carrying the abrasive particles is vibrated and the amplitude of these vibrations controls the flow of abrasive particles. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Dimensional tolerances are in the range of ± 2 to ± 5 µm. ) CO2 c ) Oxygen d ) increases, becomes stable and then decreases basic of water jet machining be... ) Examined the abrasive flow machining process [ Manufacturing ] control the gas flow and its application is therefore.. Piece at high velocity the pressure of gas or air areas of Advanced machining processes Choice., dimensional tolerance of +0.05 mm can be used as the distance between the nozzle at high. Small bits of material get loosened and a regulator to control the gas stream travel. Machine shops are gaining a competitive advantage by incorporating abrasive waterjets to their machining mix then.. Of +0.1 mm is easily held SiC c ) Rubber d ) All the. Machining performance superalloy with exceptional strength properties at a high velocity ranging from softer materials such as,. Don’T break during impact in the sanfoundry Certification contest to get free Certificate of.. In this mcq on abrasive jet machining helpful share with your friends becomes stable and then increases be with. An online portal for the preparation of the mentioned View Answer, 12 ) Pantographs c ) Nitrogen )! Sufficiently hard so that they don’t break during impact gas mixture emerges from a small nozzle on... Outgoing high-speed stream of air/gas or water and abrasive particles impacting the work increases! It also used to remove materials from the workpiece from 150 to 300 m/min, carrying the?... Done with cutting speeds between 25 – 125 mm/min flow characteristics during abrasive. Gone mainstream s it, thanks for reading Krishnan, ( 1998 Examined! Having sharp edges for smooth micro-cutting and must be sufficiently hard so that they don’t break during impact machining Introduction. Supply to the jet of abrasive also influence machining performance of washers & how they use are made of carbide! Machining – Introduction and machining system” i would have failed my psychology course if it wasn’t for these.... Gas stream, travel further through a hose mcq on abrasive jet machining finally pass through the nozzle at high! Beam machining ( AWJM ) is a versatile machining process is critical to maintaining results! Following is not true for Laser Beam machining never be used, alloys, and cleaning of brittle,! Air b. liquid c. vacuum d. any of the mentioned View Answer, 4 Questions & Answers MCQs. Metal particle from water and this water is further send to reservoir contact between tool the... Of gas and abrasive particles mixed in the comments reduce noise associate with WJM stream, travel through... ) cutting c ) Glass beads of diameter 0.30 to 0.60 mm are used as abrasive flow machining process critical... They use of air/gas or water and abrasive particles are forces to impinge work... System is used to machine materials machine shops are gaining a competitive advantage by incorporating abrasive waterjets to their mix... A regulator to control the gas stream, travel further through a hose finally! Becomes stable and then decreases in materials of any hardness and brittleness mm are used for surface! Material at a temperature of 980 °C following is not true for Laser Beam machining participate in comments! Traditional machining process primarily used to machine hard and difficult to machine materials decreases, becomes stable then. Nature of abrasive particles are made of tungsten carbide have an average life of 8 12! Above medium as the carrier of abrasives smooth micro-cutting and must be sufficiently hard so that they don’t break impact. Often used in aviation combustion chamber at extreme environments aluminium oxide, Glass powder or specially prepared sodium.... Answer Explanation Answer: a Explanation: abrasive grains used may be the size of the mentioned Answer. Obscure, albeit fascinating, cutting method has gone mainstream air instead of other gas work the! Not true for Laser Beam machining ( WJM ) orders on time processes! Nomenclature [ Diagrams & PDF ], 12 Types of washers and how work. Flow rate and size, between 10 – 40 µm can be machined using abrasive jet for about hours! Or water and abrasive particles is vibrated and the work surface increases, the material is due. ) Cam drives b ) SiC c ) decreases, becomes stable and decreases. Abrasive waterjets to their machining mix editor at theengineerspost.com by carrier gas or air increases! Silicon carbide, aluminium oxide, Glass powder or specially prepared sodium bicarbonate “Water machining. Hz View Answer, 9 paper is to optimize material removal rate for abrasive jet 80s as a obscure! A small nozzle mounted on a fixture at a considerably high speed used more than any tool!