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. In abrasive jet machining, kinetic energy of high velocity (100 – 300m/s) abrasive jet is utilized to remove work material by impact erosion. The fragile material can be easily machined. Dimensional tolerances are in the range of ± 2 to ± 5 µm. What is the full form of WJM in advanced machining processes? 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. a) Vaporization Nozzles made of tungsten carbide have an average life of 8 to 12 hours. In addition to the above abrasives, dolomite (calcium magnesium carbonate) of 200 grit size is found suitable for light cleaning and etching. Presentation of-abrasive-jet-machining 1. A. Waspaloy is often used in aviation combustion chamber at extreme environments. 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. In Abrasive jet machining, what may be the size of the abrasive grains used? The mixing chamber, carrying the abrasive particles is vibrated and the amplitude of these vibrations controls the flow of abrasive particles. b) 2.0 to 8.0 kg /cm2 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. Drain and Catcher. _____ is a non-traditional machining processes that depends on the eroding effects of different reagents. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. a) Automatic Jet Manufacturing It also used to reduce noise associate with WJM. It is the material removal process where the material is removed by high velocity stream of air/gas or water and abrasive mixture . View Answer, 7. d) All of the mentioned The gas flow and pressure is controlled by a pressure regulator. What is Abrasive Jet Machining. a) Cam drives 1.In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate. In advanced machining processes, what is the full form of AJM? This is basic of water jet machining (WJM). In this article, you will learn what are 14 different types of washers and how they work? View Answer, 3. a) Cleaning Types of Spanners are used more than any other tool for tightening or opening different jobs. State whether the following statement is true or false. Abrasive jet machining (AJM) is a process that removes material by directing a high speed stream of abrasive particles onto a work piece. Answer Explanation ANSWER: any of the above medium. b) Abrasive Jet Machining 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. This pipeline carries a pressure gauge and a regulator to control the gas flow and its pressure. Ability to cut fragile and heat-sensitive materials without damage as no heat is generated due to the passing of gas or air. Which type of materials can be machined using Abrasive jet machining? b) Pantographs 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. It separate metal particle from water and this water is further send to reservoir. Their writers are highly professional, and always deliver orders on time. d) All of the mentioned In Abrasive Jet Machining (AJM), abrasive particles are made to impinge on the work material at a high velocity. In Abrasive jet machining, work piece material of removed by which of the following means? c) Automated Jet Machining Ability to cut intricate hole shapes in materials of any hardness and brittleness. This outgoing high-speed stream of the mixture of gas and abrasive particles is known as abrasive jet. b) Cutting View Answer. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. With repeated impacts, small bits of material get loosened and a fresh surface is exposed to the jet. Abrasive Jet machining Consists of several Parts like: Gas Supply; Filter; Pressure Gauge; Regulator; Mixing chamber; Nozzle; 1. d) 200 – 300 µm The AJM differs from sandblasting. 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. a) Copper Types, Nomenclature [Diagrams & PDF], 14 Types of Washers & How They Use? with [Pictures & PDF], 12 Types of Spanners and Their Uses [with Pictures] PDF. An abrasive is small, hard particle having sharp edges and an irregular shape . Saif M. is a Mechanical Engineer by profession. d) All of the mentioned b) Air 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. WHAT IS ABRASIVE JET MACHINING ? a. If abrasive water jet machining is used, abrasive particles mixed in water stream before entering into nozzle. View Answer, 5. Filter: Filter indicates the cleanness of the fuel supply. 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. To control the size and shape of the cut either the workpiece or the nozzle is moved by cams, pantographs or other suitable mechanisms. If you found this article helpful share with your friends. c) Oxygen 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. 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. c) 10.0 to 18.0 kg/cm2 b) 50 – 100 µm What is the pressure of gas that is to be supplied, for carrying the abrasives? Join our social networks below and stay updated with latest contests, videos, internships and jobs! The drain and catcher system is used to remove debris and other machined particle form water. 3. 2. All Rights Reserved. A typical material removal rate for abrasive jet machining is 16 mm/min in cutting glass. 11. Increases continuously B. Decreases continuously C. Decreases becomes stable and then increases D. Increases, becomes stable and then decreases Answer: Option D In this machining process a focus stream of abrasive particles are forces to impinge on work piece at high velocity. With close control of the various parameters, dimensional tolerance of +0.05 mm can be obtained. Abstract- Abrasive Water Jet Machining (AWJM) is a versatile machining process primarily used to machine hard and difficult to machine materials. a) Al2O3 The machining accuracy is poor and the nozzle wear rate is high. Which of the following is not true for Laser beam machining? It is another non traditional machining process where there is no contact between tool and the work piece. View Answer, 8. Abrasive Flow Machining AUTOFLOW: AFM at Its Best. a) 10 Hz These particles mic in the gas stream, travel further through a hose and finally pass through the nozzle at a considerably high speed. While larger sizes are used for rapid removal rate. c) Deburring 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? 1. Apart from flow rate and size, types of abrasive also influence machining performance. The process parameters are chosen as abrasive flow rate, pressure, and standoff distance. What used to be known in the 80s as a rather obscure, albeit fascinating, cutting method has gone mainstream. This process can be advantageously utilized for surface cleaning, coating removing, deflashing, trimming, engraving, deburring, drilling, parting, ceramic abrading, glass frosting, etc. View Answer, 6. To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. © 2011-2020 Sanfoundry. Electrochemical Machining c. Abrasive Jet Machining d. Laser Beam Machining (Ans:b) 21. a) 10 – 40 µm In machining system of AJM, which is the medium of carrying the abrasive grains for machining? b) Electro plating In this article, you'll learn what is cams and followers and its types, nomenclature, working, application, and more with diagrams. a) Liquids 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)increases continuously. The metal is removed due to erosion caused by the abrasive particles impacting the work surface at high speed. 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 … c) 50 Hz Sanfoundry Global Education & Learning Series – Advanced Machining. 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. Hz View Answer, 9, the accuracy of +0.1 mm is easily held good accuracy ( )... Made to impinge on the work surface increases, the material removal rate kerf. Engineering College velocity abrasive particles impacting the work surface increases, the accuracy of +0.1 is... 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