The need for methods of shaping these unshakable materials with the requirements of higher production rate at cheaper rates may demand the use of non-traditional processes. Explanation: The optimal range used is between 10-40 μm. d) Ultrasonic frequency, 3. a) Decreases a) True c) Three times greater b) Very less hardening a) Glass a) Brittle Lead time typically days depending on complexity of tool. 9. Introduction Ultrasonic machining is a non-traditional machining process. b) Increases b) 5 – 10 % a) USM View Answer, 3. d) 200 – 300 µm View Answer. a) CO2 d) 30 – 35 %, 9. Different classifications of Non-traditional machining based on source of energy are ________ d) All of the mentioned, 6. Answer: b Explanation: In Abrasive water jet machining, material removal takes place by the erosion of the work piece material using abrasives accelerated by jet stream, SSC-JE & RRB-JE(Mechanical) Full syllabus free video lectures:- https://www.4bengineers.com/post/ssc-je-rrb-je-free-full-video-lectures-mechanical-engineering, *******************************************************************, For College Info:-https://www.4bengineers.com/4bjobalert/categories/college-counselor, ******************************************************************, FOR NOTES AND STUFFS (Our Website):- https://www.4bengineers.com/, My Amazon Store for You:- https://www.amazon.in/shop/4bengineers?isVisitor=true, *************************************************************************, Telegram channel link:-https://t.me/ashish4Bengineers, **********************************************************************, For Job Updates:- https://www.4bengineers.com/4bjobalert, *************************************************************, Instagram:- https://www.instagram.com/4bengineers/?hl=en, Facebook:- https://www.facebook.com/4bengineers, ***************************************************************. a) Direct injection of slurry d) Ultrasonic frequency c) Feed pipe 5. Despite its machinability, the material is still abrasive, causing some wear of cutting edges. 2. d) 0.25 – 0.38 μm a) Side wear of tool In the following properties of nozzle, which of them does not influence the MRR? a) Amplitude b) SiC There are so many constraints which need to be taken into account while machining, but without proper knowledge of material … c) 10 – 15 hrs c) Unsteady abrasive flow d) 0.10 – 0.20 mm a) Corrosion Economical for low production runs. d) All of the mentioned d) All of the mentioned d) Synthetic sapphire c) 1 – 10 µm b) Ultrasonic machining b) Work piece Answer: c In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them? c) 28 L/min a) <100 mm2 Explanation: Hard to cut materials, which are mentioned above, can be machined using Abrasive water jet machining. View Answer. c) Silica dust d) None of the mentioned d) 0.40 – 1.40 cm/min, 9. a) True View Answer. USM removes materials using the ____________ tool. Machining rate can be affected by the ratio of hardness of tool to that of hardness of work piece. Explanation: The above mentioned properties of abrasive grains influence the material removal rate. d) All of the mentioned. 4BEngineers allows students to be thorough with their choice of streams or subjects, by enabling them to learn at their comfortable time without losing out on sessions and conveniently access sessions from any given place. 1951 –First report on equipment and technology of USM. d) None of the mentioned b) False 7. In which of the following industries, Non-traditional machining methods play an important role? Answer: d b) ± 0.05 mm d) High hardening b) 1925 c) Size c) Accurate feed c) 5 hrs Work material, Tool material, ... MACHINABILITY IN USM OF TIT ANIUM. Sources used in thermal machining are ________ What are the processes where Abrasive jet machining can be used? a) Very low In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. d) 70 Hz, 10. a) Ions “In Abrasive jet machining, commercial grades powders can be used for machining.” In production of EDM electrodes, typical ultrasonic speeds, in graphite ranges between? d) All of the mentioned, 14. In PBPG UL-752, increment in material removal rate by 75.58%, tool wear rate by 45.34% and surface roughness by 34.18%. a) Steady abrasive flow View Answer. In an USM operation, the surface finish depends mainly on the size of the abrasive grains. 3. View Answer. d) ± 0.07 mm, 15. b) Paul O Flawer Special tooling required for each job. 11. b) Electron transfer b) Concentrator Micro ECM is used to machine which type of parts? 6. We already know why, and it’s down to a few features. Ultrasonic Machining (USM) In ultrasonic machining, ultrasonic waves are produced by means of magnetostrictive effects which is converted into mechanical vibration. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract—Ultrasonic machining (USM) is a non-traditional machining process being widely used for commercial machining of brittle and fragile materials such as glass, ceramics and semiconductor materials. b) Diameter Of the following scientists, who discovered magnetostrictor effect? Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining? d) Decrease and then increase, 7. In AJM, which of the following materials are used as abrasive grains? Explanation: Using deburring process through ECM, sharp edges are dulled, which are produced after rough cuts. a) Glass Through analysis, it concludes that hard abrasive gives the large stressed zone, which increases the material removal rate. c) 30% water and 70% abrasives View Answer. d) Abrasive Water Jet Manufacturing, 2. 3. a) Mechanical MACHINING GUIDELINES OF GLASS-MICA COMPOSITE MATERIALS Standard machine shop equipment can be used in machining glass-mica composite materials. b) False, 7. What is the full form of USM in advanced machining process? b) Wear a) <100 mm2 View Answer. Answer: b Explanation: In Abrasive jet machining, tolerance limit values range between ± 0.05 mm. a) Ultrasound manufacturing Which of the following distribution factors, does not affect the machining parts? c) 75% d) Decrease and then increase Explanation: The process, which uses USM for drilling, is known as Rotary Ultrasonic Machining (RUM). a) <5% The machinability rate of UNS C10200 coppers is about 20%. View Answer. Also, the assumptions made are: 1. a) 10 – 15 % b) Abrasive Jet Machining What are the processes where Abrasive jet machining can be used? Explanation: Up to a certain limit of vibration frequency, MRR increases and after that it decreases. c) 30% water and 70% abrasives In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. What is the percentage of contribution of cavitation to the total material removed? here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Advanced Machining Questions and Answers – USM – Machining System, Next - Advanced Machining Questions and Answers – USM – Factors Affecting MRR, Machine Design Questions and Answers – Cast Steel & Aluminium Alloys, Machine Design Questions and Answers – Copper Alloys & Die Casting Alloys, Chemical Process Calculation Questions and Answers, Engineering Physics II Questions and Answers, Waste Water Engineering Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers, Machine Tools & Machining Questions and Answers, Advanced Machining Processes Questions and Answers, Advanced Machining Questions and Answers – MAF – Process parameters and MRR, Advanced Machining Questions and Answers – Abrasive Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Water Jet Machining – Introduction and Machining system, Advanced Machining Questions and Answers – Ice Jet Machining, Advanced Machining Questions and Answers – Electro Discharge Machining-Introduction, Advanced Machining Questions and Answers – Plasma Beam Machining-Introduction And Machining system, Advanced Machining Questions and Answers – Abrasive Water Jet Machining – Introduction, Advanced Machining Questions and Answers – Non Traditional Machining, Advanced Machining Questions and Answers – Electrochemical Buffing-Introduction, Material Removal, Advanced Machining Questions and Answers – Electrochemical Superfinishing-Introduction, Material Removal, Process accuracy, Advanced Machining Questions and Answers – CHM – Process Parameters and Material removal. In Micro-USM, using WC tool, what is the value of diameter can be achieved? d) All of the mentioned Which of the following use ECM for different applications? b) False, 8. In this machining, the metal removed from the workpiece by microchipping and erosion with fine abrasive grains in the slurry. a) Two times greater These are mainly due to the abrasive nature of the synthetic fibres. b) 0.15 – 1.5 µm a) Nitrogen The term ultrasonic is used to describe a vibratory wave of the frequency above that of the upper-frequency limit of the human ear, i.e. The maximum speed of penetration in soft and brittle materials such as soft ceramics are of the order of 20 mm min, but for hard and tough materials, the penetration rate is lower. a) Increases Explanation: Surface roughness value in AJM varies between 0.15 – 1.5 µm, depending on grain size, 1. b) Decreases Amplitude of oscillation of tool in USM ranges between ________ b) Perpendicularly oscillating b) Water jet stream 2. 3. Ultrasonic Machining can be used for which of the following processes and applications? Explanation: Electrolyte jet in micro ECM acts as the micro tool for machining. How is the material removed in Abrasive water jet machining? Answer: b Answer: c In advanced machining processes, what is the full form of AWJM? b) 0.30 – 0.50 mm a) Ultrasonic Machining If splashing occurs, it will result in an increase of material removal rate in USM. a) 1942 7. What is the grain size of abrasive particles, which are often used for Abrasive water jet machining? View Answer. a) Side wear of tool Explanation: For above requirements this machining is used. Material in thermal machining is removed by which of the following means? Explanation: The pressure of the carrying gas should range between 2 to 8 kg/cm2. 4. View Answer. b) False. “Using Abrasive jet machining, micro deburring of hypodermic needles can take place.” Explanation: Material removal of porous material takes place by erosion. c) Remains same d) Mounting Which is softer material in USM? Learn vocabulary, terms, and more with flashcards, games, and other study tools. c) Abrasion d) 20 – 50 %, 3. Answer: a Micro-ultrasonic machining (micro-USM) is capable of machining high aspect ratio microchannels on hard and brittle material such as silicon, glass, ceramics, etc. Explanation: As static feed pressure increases, MRR increases up to a limiting condition and then no further increase takes place, 1. a) Cleaning d) None of the mentioned, 12. b) 0.04 – 0.08 mm c) Electrons View Answer. 12. d) All of the mentioned, 1. b) Sinking and contouring Explanation: Tool is softer than work piece in USM. a) Size View Answer. b) Static Pressure c) 18-20 kHz 8. a) 0.1 – 2 g/min Answer: c During ultrasonic machining, the metal removal is achieved by (a) high frequency eddy currents (b) high frequency sound waves (c) hammering action of abrasive particles (d) rubbing action between tool and workpiece 2. c) 10 – 15 hrs View Answer. d) All of the mentioned, 2. 2. d) 700 hrs, 14. b) 15 – 20 % c) Corrosion What is the life of Tungsten carbide material nozzle? 10. b) 1958 b) Air carrier b) 2 to 5 mm d) None of the mentioned, 11. vii. a) Soft materials c) Power supply d) Distance from work piece, 5. View Answer. b) Benzene c) Remained same List three limitations of USM 1. b) Erosion Answer: d Answer: b How much is the value of surface finished, achieved using Ultrasonic Polishing? b) SiC d) All of the mentioned, 11. It has been reported that for sultana raisins at aw of 0.536, the onset and midpoint of Tg are 32.28 C and 28.39 C, respectively, when using a scan rate of 10 C min 1 [10]. Explanation: All of the materials mentioned above can be used for making abrasives in Abrasive water jet machining. c) Joule 10. a) Perpendicularly rotating Explanation: The surface roughness obtained, when machined using abrasive of grit number 240, is between 0.25 – 0.38 μm. Please read all the important question of that chapter because the MCQ comes from only this important topic, 1. b) 0.3 μm c) 30 – 56 g/min How much percent of the abrasives are recommended in general for abrasive medium? 6. c) Accuracy b) False d) None of the mentioned, 6. Explanation: Indentation and cavitation can be done using micro ECM by moving the work piece or switching the pulse current. Explanation: In Abrasive jet machining, tool changes are not required. What is the value of abrasive grain flow rate in Abrasive jet machining? c) Electron removal 6. Answer: d The rate of material removal in USM depends on ____. Answer: c Explanation: Different sources are used to remove the materials accordingly. b) Thermal Answer: a b) Aerospace c) 10 – 20 % Answer: c ECM is used to _________ the sharp edges produced after rough cuts. What is the value of the amplitude obtained without mechanical amplifier? d) All of the mentioned d) Steve John, 2. Answer: b Conicity resulting after machining by Ultrasonic Machining can be reduced by? b) Electron transfer b) Strength d) All of the mentioned, 7. Explanation: Silica dust, that occurs after machining can be a health hazard in AJM. Explanation: Grain size of the abrasive particles range between 10 – 150 µm in Abrasive water jet machining. a) Glass d) 300 – 500 m/sec d) 0.40 – 1.40 cm/min b) Thin Explanation: Without affecting the conductor, both stripping and cleaning are done, by using Abrasive jet machining. What is the limit of surface area that is to be machined using USM? c) Electron removal c) Sapphire Drilling is one of the indispensable methods for building products with composite panels. State whether the following statement is true or false. Explanation: Typical ultrasonic speeds used are between 0.4 – 1.4 cm/min, used in producing EDM electrodes. In Abrasive jet machining, work piece material of removed by which of the following means? a) Magnetostrictor a) Automatic Jet Manufacturing Explanation: Penetration rate depends on cavity’s depth and size of the cavity i.e.., area and volume, which can be determined by diameter. d) Abrasive Jet Manufacturing, 2. a) Force 5. c) 1 – 10 µm b) False a) 0.1 μm b) 0.10 – 0.25 cm/min a) True c) Tool surface a) Complex shapes Welding. d) Ultra sonar machining, 3. Answer: b a) Tool d) Inclined oscillating c) Ferrite Answer: d b) Water jet stream b) Pantographs In the following properties of abrasive grains, which of them changes rate of material removal? d) 100 – 150 μm a) Decreases Like the 70–300mm f/4.5–5.6 DO it contains an image stabilizer; however, for focusing it uses the lower quality micro-USM design, and therefore requires the focus motor to be disengaged before manual focusing. a) Moisture Which of the following materials in Abrasive jet machining can be a health hazard? Explanation: Mixing chamber consisting of carrier gas and the abrasive grains, vibrates at a frequency of 50 Hz. Machinability is the ease with which a metal can be cut permitting the removal of the material with a satisfactory finish at low cost. Materials with good machinability (free machining materials) require little power to cut, can be cut quickly, easily obtain a good finish, and do not wear the tooling much.The factors that typically improve a material's performance often degrade its machinability. Advantages of Ultrasonic Machining Process (USM): Highly brittle materials can be easily machineable. 3. b) 2 hrs c) Cavitation Answer: b d) 7 μm, 1. c) ± 0.10 mm b) Jet engines d) Erosion. a) Steady abrasive flow If there is an increase in viscosity of slurry, what happens to MRR? b) 30 Hz Explanation: Diameter value up to 5 μm can be achieved, using Micro-ultrasonic machining on glass, silicon and quartz materials, 1. 2. b) 300 hrs b) Melting Answer: d Material removal rate decreases as the static load increases in case of USM [12, 130]. Explanation: Different features of tool also affect the material removal in USM. When machining porous material, which type of mechanism is introduces? b) Cavitation b) Sinking and contouring b) Tools having negative taper d) 7.0 – 10.0 µm, 1. View Answer. d) 100% View Answer. b) Decreases Answer: b d) All of the mentioned As the tool area increases, what happens to MRR? Explanation: Rotary Ultrasonic Machining can be used to drill holes in the above mentioned materials. What is the value of the amplitude obtained without mechanical amplifier? a) Water As the tool area increases, MRR ____. 9. Explanation: In Abrasive jet machining, the flow rate of abrasive carrier gas is around 28 L/min. c) 200 – 500 µm 1. c) High static pressure 5. a) 5-10 kHz In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? a) Vaporization c) 1974 7. Best lenses for Canon full-frame DSLRs. c) Medical a) Ions View Answer, Answer: d d) All of the mentioned, 6. b) False, 13. Explanation: Nozzle made up of synthetic sapphire material has a life period which is about 300 hrs. a) Drilling b) Work piece Explanation: Unlike the normal Ultrasonic Machining, Micro-USM utilizes the work piece’s vibration and the rotation of the tool. c) Nitrogen Value: ... and compliance from a single pane of glass. d) All of the mentioned, 5. d) Abrasive Water Jet Manufacturing a) Very low As the abrasive flow rate increases, what happens to the volumetric removal rate? 11. What is the value of the amplitude obtained when we use mechanical amplifier? From an industrial perspective, there are some issues with the machinability of synthetic fibre/polymer composites (glass fibres), including hole accuracy, delamination, appearance and energy consumption. a) 0.01 – 0.10 mm When machining porous material, which type of mechanism is introduces? The tool never contacts the work-piece and as a result the grinding pressure is rarely more, which makes this operation perfect for machining extremely hard and brittle materials, such as glass, sapphire, ruby, diamond, and ceramics. d) All of the mentioned, 9. This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “USM – Material Removal”. c) Accurate feed Frequency of tool’s oscillation in USM ranges between ________ Answer: b b) 20 – 60 μm b) Decreases c) Normal sized parts USM is used for grinding Quartz, Glass, ceramics 14. a) 01 – 20 μm View Answer. But, again, all the non-USM, non-STM lenses regardless of their version don't … a) Increases Amplitude of the oscillation ranges between which of the following values? b) Heat affected zones b) Work piece What are the tolerance limit values in Abrasive water jet machining? There are several non-USM, non-STM, version II EF-S lenses, and they are all inferior to the STM version. View Answer. a) 1 hr Answer: c 2. a) Frequency d) High a) Size b) Hardened steels c) 25 – 30 % Which of the following produces small indents and cavities using micro ECM? b) <500 mm2 Which type of materials can be machined using Abrasive jet machining? d) Ultra sonar machining When the static pressure of the feed is increases, what happens to MRR? a) 0.01 – 0.50 µm Of the following scientists, who discovered magnetostrictor effect? Surface defects that may be occurred during thermal machining are ________ “In Abrasive jet machining, commercial grades powders can be used for machining.” a) 0.1 to 1.0 kg/cm2 What is the value of the amplitude obtained when we use mechanical amplifier? b) Decreases The … Answer: b c) Deburring a) 10 L/min Oxyacetylene welding, brazing, gas shielded arc welding, butt welding, and soldering are most commonly used methods for welding UNS C10200 coppers. d) None of the mentioned View Answer. c) 150 –300 m/sec b) Electron Beam Machining Identify major components of USM equipment viii. Typical roundness error in graphite, resulted due to lateral vibrations is between? , All the above mentioned means machining tool: the process what is the machinability rate of glass by usm? which of the particles above! Cutting is required for deburring, cutting, cleaning and insulation stripping take place affecting. L/Min b ) low c ) Remains same d ) PAM, 8 topic,.. 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