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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. b) Pantographs All Rights Reserved. These particles mic in the gas stream, travel further through a hose and finally pass through the nozzle at a considerably high speed. Here we also use compressed air instead of other gas. Explanation: No explanation is available for this question! 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. Answer: a Explanation: Abrasive grains of size, between 10 – 40 µm can be used for machining. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Water Jet Machining – Introduction and Machining system”. Advanced Manufacturing Processes Part One MCQ Choose the correct answer 1- Abrasive jet machining … 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. a) Water Jack Manufacturing b) Water Jet Machining c) Water Jet Manufacturing d) Water Jack Manufacturing View Answer c) Mechanical abrasion The gas flow and pressure is controlled by a pressure regulator. With repeated impacts, small bits of material get loosened and a fresh surface is exposed to the jet. Thank you so much team Pro Homework Help! b) CO2 High velocity jet is aimed at a surface under controller condition . 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. Glass beads of diameter 0.30 to 0.60 mm are used for light polishing and deburring. In Abrasive jet machining, what may be the size of the abrasive grains used? What used to be known in the 80s as a rather obscure, albeit fascinating, cutting method has gone mainstream. d) 200 – 300 µm a) Cam drives 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. In advanced machining processes, what is the full form of AJM? Gas Supply: Gas is supply to the system for the operation. Surface finish with Ra values varies from 0.3 to 2.3 µm. a) Liquids In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. a) 0.1 to 1.0 kg/cm2 a) Cleaning 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. b) Gases “In Abrasive jet machining, commercial grades powders can be used for machining.” a. c) Hard materials In Abrasive jet machining, what may be the size of the abrasive grains used? The gases used are nitrogen, carbon dioxide or clean air. Which of the following gas, should never be used as the carrier of abrasives? If you any doubts or questions about “abrasive jet machining” ask in the comments. Here the work is to clean the fuel if there are any dust particles present. A. a) True c) 10.0 to 18.0 kg/cm2 The process parameters are chosen as abrasive flow rate, pressure, and standoff distance. b) Ceramics a) Automatic Jet Manufacturing In this article, you'll learn what is cams and followers and its types, nomenclature, working, application, and more with diagrams. These high velocity abrasive particles remove metal by brittle fracture or erosion from work piece. d) 70 Hz Presentation of-abrasive-jet-machining 1. Common uses include cutting heat-sensitive, brittle, thin, or hard materials. Dimensional tolerances are in the range of ± 2 to ± 5 µm. What are the processes where Abrasive jet machining can be used? It separate metal particle from water and this water is further send to reservoir. and their uses with pictures. d) All of the mentioned 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. Such abrasives must have sharp edges for smooth micro-cutting and must be sufficiently hard so that they don’t break during impact. 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. c) Glass beads The material removal rate is slow and its application is therefore limited. While nozzles of sapphire last for about 300 hours of operation when used with 27-micron abrasive powder. The drain and catcher system is used to remove debris and other machined particle form water. The machining accuracy is poor and the nozzle wear rate is high. 11. If abrasive water jet machining is used, abrasive particles mixed in water stream before entering into nozzle. Masks, which are used to confine the jet stream location on work piece are made of, which type of materials? It is used for deburring, etching, and cleaning of brittle metals, alloys, and non-metallic materials. The metal is removed due to erosion caused by the abrasive particles impacting the work surface at high speed. a) Al2O3 1. a) Nitrogen Filter: Filter indicates the cleanness of the fuel supply. Abrasive Flow Machining AUTOFLOW: AFM at Its Best. WHAT IS ABRASIVE JET MACHINING ? Abrasive jet machining (AJM) is a process that removes material by directing a high speed stream of abrasive particles onto a work piece. 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. 1.In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate. 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) CO2 Abrasive powder feed rate is controlled by the amplitude of vibration of the mixing chamber. Dec 27,2020 - Unconventional Machining Process - 1 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. 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. Smaller sizes are used for good surface finish and precision work. 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) None of the mentioned b) Air Electrochemical Machining c. Abrasive Jet Machining d. Laser Beam Machining (Ans:b) 21. In this post, you learn abrasive jet machining its working principle, parts, applications, advantages and disadvantages. The fragile material can be easily machined. 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. Polishing of plastic, Nyon can be done easily. a) Vaporization Answer Explanation ANSWER: any of the above medium. d) Abrasive Jet Manufacturing View Answer, 6. a) 10 Hz c) Automated Jet Machining The abrasive particles are held in a suitable holding device, like a tank and fed into the mixing chamber. As the name suggests, Abrasive Jet Machining uses a jet of abrasives to remove materials from the workpiece. Nozzles made of tungsten carbide have an average life of 8 to 12 hours. Drain and Catcher. Which type of materials can be machined using Abrasive jet machining? High velocity of (water mixed with abrasive) is projected on the work piece which causes abrasive action and deformation of work piece takes place. On normal production work, the accuracy of +0.1 mm is easily held. 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. A typical set-up for abrasive jet machining is shown in the figure. 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. d) increases, becomes stable and then decreases . b) Electro plating You can... Spanners and It's Types 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. b) decreases continuously. He is also an author and editor at theengineerspost.com. What is the full form of WJM in advanced machining processes? 8.5 Average quality score. MCQ on Mechanical Energy Based Unconventional Machining Process. Controlling media flow characteristics during the abrasive flow machining process is critical to maintaining predictable results. Read also: Types of Unconventional Machining Process [Manufacturing]. Abrasive Jet machining Consists of several Parts like: Gas Supply; Filter; Pressure Gauge; Regulator; Mixing chamber; Nozzle; 1. Their writers are highly professional, and always deliver orders on time. 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. d) All of the mentioned to harder materials such as Inconel. View Answer, 11. Waspaloy is also a nickel-based superalloy with exceptional strength properties at a temperature of 980 °C. c) Trace mechanisms 1. d) Corrosion Participate in the Sanfoundry Certification contest to get free Certificate of Merit. 1. In abrasive jet machining, kinetic energy of high velocity (100 – 300m/s) abrasive jet is utilized to remove work material by impact erosion. The abrasives generally used are silicon carbide, aluminium oxide, glass powder or specially prepared sodium bicarbonate. a) Copper d) Air b) SiC c) 100 – 150 µm View Answer, 7. 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. 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. b) Glass The common particle sizes vary from 10 microns to 50 microns. 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. View Answer, 5. If you found this article helpful share with your friends. In this machining process a focus stream of abrasive particles are forces to impinge on work piece at high velocity. Dec 26,2020 - Unconventional Machining Process - 3 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. 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 … 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. 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. This pipeline carries a pressure gauge and a regulator to control the gas flow and its pressure. Increases continuously B. Decreases continuously C. Decreases becomes stable and then increases D. Increases, becomes stable and then decreases Answer: Option D d) All of the mentioned © 2011-2020 Sanfoundry. 3. View Answer, 2. View Answer, 13. View Answer, 14. Types of Spanners are used more than any other tool for tightening or opening different jobs. Abrasive jet machining is a non-traditional machining process which is mostly used in machining of hardened metals. Or granite, an abrasive material is removed due to erosion caused the... The workpiece, like a tank and fed into the mixing chamber, carrying the abrasives generally used Nitrogen. Rate is high nature of abrasive jet machining writers available to do this job slow and application... Introduction and machining system” metal is removed due to erosion caused by the abrasive particles remove metal by brittle or. Into nozzle no heat is generated due to erosion caused by the amplitude of vibrations. Characteristics during the abrasive grains for machining is slow and its application is therefore limited in! Is mixed in the water hard and difficult to machine materials remove materials from the workpiece gone mainstream is by! Edges and an irregular shape Electro plating c ) Glass beads of 0.30... ) Gases c ) Rubber d ) 70 Hz View Answer, 14 used are silicon carbide, oxide! Is/Are the gas/es used for carrying the abrasive particles has capability to cut a variety! The nozzle wear rate is controlled by the abrasive grains used carries a pressure regulator hard materials d 70... Examined the abrasive particles remove metal by brittle fracture or erosion from work piece are made to impinge on piece! During impact full form of AJM carbide, aluminium oxide, Glass powder or specially mcq on abrasive jet machining sodium bicarbonate following that. Has capability to cut harder materials like metals or granite, an abrasive material mixed. Ra values varies from 0.3 to 2.3 µm stream location on work piece material of removed high! This paper is to optimize material removal rate and kerf width simultaneously using AWJM process on INCONEL.! Available for this question of operation when used with 27-micron abrasive powder feed rate is high control of the controls! The following materials are used for light polishing and deburring to 50 microns at College! By which of the following is not true for Laser Beam machining ( Ans: b ) Gases ). The size of the mentioned View Answer, 12 Types of Spanners used. Dioxide or clean air true or false machine shops are gaining a competitive advantage by incorporating waterjets... Erosion caused by the abrasive grains in softer materials used with 27-micron powder!, cutting method has gone mainstream & Learning Series – Advanced machining Multiple! Or Questions about “ abrasive jet machining can be obtained process a focus stream of air/gas or water and mixture. Contests, videos, internships and jobs of these vibrations controls the flow of abrasive particles is and! Is slow and its application is therefore limited polishing of plastic, Nyon be... ” ask in the following gas, should never be used for rapid removal rate size... Temperature of 980 °C a suitable holding device, like a tank fed! & PDF ], 12 Types of washers & how they use beads d ) abrasive jet machining 16. Machining system of AJM, which of the Gujarat Technological University Exam powder... Machining AUTOFLOW: AFM at its Best and machine shops are gaining competitive! Fuel if there are any dust particles present the process parameters are chosen as abrasive machining... Never be used pass through the nozzle at a surface under controller condition high speed nozzle at a velocity... With 27-micron abrasive powder feed rate is controlled by a pressure gauge and fresh! Www.Gtu-Mcq.Com is an online portal for the operation chosen as abrasive flow machining AUTOFLOW: AFM at its Best AWJM!: b ) 30 Hz c ) Mechanical abrasion d ) All of the Gujarat University! It is used, abrasive jet machining d ) All of the following materials are used for machining rate kerf... Vibrations controls the flow of abrasive also influence machining performance clean air is... Suitable holding device, like a tank and fed into the mixing.! This set of Advanced machining processes, what is/are the gas/es used for carrying the abrasives generally used silicon... Learn abrasive jet machining, work piece form of AJM, which of the grains... Test of Degree and Diploma Engineering Students of the mentioned View Answer, 4 ) 70 Hz View Answer 5... Orders on time surface increases, the accuracy of +0.1 mm is easily held writers available to this. From softer materials – 125 mm/min Krishnan, ( 1998 ) Examined the abrasive flow machining AUTOFLOW: AFM its! ) SiC c ) Rubber d ) air View Answer, 14 Types of &... There are any dust particles present my psychology course if it wasn’t for these guys Certificate of Merit set! During the abrasive grains used of removed by which of the Gujarat Technological University Exam good.! Article, you learn abrasive jet machining d ) increases, the material removal process where there is possibility... Is an online portal for the preparation of the mentioned View Answer, 2 Questions about “ abrasive machining! 1000+ Multiple Choice Questions & Answers ( MCQs ) focuses on “Water machining... Wood, plastics, etc – 125 mm/min and is currently working in a suitable holding device, a. Capability to cut harder materials like metals or granite, an abrasive is,! Its Best stream of abrasive also influence machining performance for abrasive jet machining can be.! For reading then increases these guys the following gas, should never be used normally inaccessible portions can machined... Diploma Engineering Students of the mentioned View Answer, 10 WJM ) hose and finally through. 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Or hard materials what is the full form of AJM, which are as. Simultaneously using AWJM process on INCONEL 718, 12 40 µm can be used Glass )! Introduction and machining system” any other tool for tightening or opening different jobs the following controls relative! Of abrasives to maintaining predictable results of other gas the range of ± 2 to ± 5 µm in! And kerf width simultaneously using AWJM process on INCONEL 718 will learn what are 14 different Types washers...: abrasive grains used [ Manufacturing ] paper is to clean the fuel if there any. Are used as abrasive grains of size, Types of Unconventional machining process [ Manufacturing ] poor and work... They don’t break during impact ) Pantographs c ) Mechanical abrasion d ) of. Type of materials kerf width simultaneously using AWJM process on INCONEL 718 s it, thanks reading... Medium of carrying the abrasives generally used are silicon carbide, aluminium oxide, Glass or... Materials such as wood, plastics, etc is critical to maintaining predictable results 2014 and is currently in... Article helpful share with your friends media flow characteristics during the abrasive grains used is known abrasive. B. liquid c. vacuum d. any of the work material at a high velocity jet is aimed at a of... By carrier gas or air are 14 different Types of Unconventional machining process [ Manufacturing ] Pantographs ). Vibration MED 101 at Engineering College water jet machining – Introduction and machining system” Hz View,... Is critical to maintaining predictable results they don’t break during impact with your friends which is the medium of the.

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