Explanation: In practice, volumetric concentration of abrasives used range between 30 – 35 %. In which of the following industries, Non-traditional machining methods play an important role? b) Electro plating b) Wear View Answer. 15. a) Erosion View Answer. d) Form error of tool b) Melting d) High hardening, 9. View Answer. 9. Answer: d 4. a) <5% a) Large parts c) Deburring In the following properties of abrasive grains, which of them changes rate of material removal? As the tool area increases, MRR ____. a) Complex shapes b) 0.001 – 0.1 µm b) Automated Water Jet Manufacturing 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) Thermal c) Glycerol 4. In USM abrasive slurry freely flows between the work-piece & vibrating tool. View Answer. Explanation: Hard to cut materials, which are mentioned above, can be machined using Abrasive water jet machining. d) All of the mentioned It is mainly used for: (i) Drilling, (ii) Grinding, (iii) Profiling, b) Two times smaller It is difficult to machine very deep holes, as the slurry movement is restricted. 3. Author information: (1)Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Mechanical Engineering, Tianjin University, Tianjin, 300354, China. c) Glass beads b) 10 – 40 µm c) Electro-plating 2. Answer: b a) Liquids The machining rate and accuracy of USM depend on many factors. 8. b) Air 2. What is the life of Tungsten carbide material nozzle? c) Automated Jet Machining 1. In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. View Answer, Answer: d 13. c) 10.0 to 18.0 kg/cm2 Answer: b Explanation: Soft materials such as candy bars, thin softwood etc.., cannot be machined using AJM. View Answer. c) Sapphire b) Steve O Flawer Glass. It is difficult to design the correct size of the tool to get exact dimensions on the job. Explanation: As static feed pressure increases, MRR increases up to a limiting condition and then no further increase takes place, 1. Answer: d 9. 4. View Answer, Answer: d On which of the following features of cavity, will the penetration depth depend on? Explanation: Nozzle made up of WC material has a life period which range between 10 – 15 hrs. b) Increases 6. The machining system of USM contains which of the following components? Machining of polycarbonate bullet proof UL-752 and … b) Microchipping On which of the following features of cavity, will the penetration depth depend on? b) Benzene b) 0.08 – 0.13 μm It is a low material removal rate machining process. b) Decreases 7. a) Ions b) ± 0.03 mm b) 1925 View Answer. a) Glass This is one of the favorite lenses of professional photographers out there. c) 28 L/min The vibration amplitude determines, which parameter of the abrasive particles? Which of the following components, influence the material removal rate in Abrasive jet machining? Answer: c d) Synthetic sapphire, 11. c) Velocity a) True By which of the following means, material is removed in USM? d) 7 to 10 mm, 8. b) Thermal b) Jet engines The Canon EF 85mm f/1.2L II USM is not a lens for beginners. b) Erosion Answer: d d) None of the mentioned, 4. Answer: a c) ± 0.10 mm View Answer. Answer: b Also, the assumptions made are: 1. b) False Answer: d b) 50 – 100 µm In AJM, abrasive jet from the nozzle follows, which type of path for a short distance? c) Chemical and electro-chemical. 2. Answer: b d) Abrasive Water Jet Manufacturing, 2. d) All of the mentioned In advanced machining processes, what is the full form of AWJM? c) 5 μm b) Material b) Wearability Which of the following are the features of tool affecting MRR in USM? a) Frequency Explanation: Grain size of the abrasive particles range between 10 – 150 µm in Abrasive water jet machining. View Answer. 8. b) 3 – 20 g/min a) Increases Answer: d d) 0.7 μm a) Glass This type of glass material work using boom lift, its ok for customer side react more satisfaction and their refered boom lift rental machine most of company and buying refered to … In other hand, in AHRG BS-476, increment in material removal rate by 61.24%, tool wear rate by 31.46% and surface roughness by 23.85%. a) Tungsten Carbide Typical roundness error in graphite, resulted due to lateral vibrations is between? Sanfoundry Global Education & Learning Series – Advanced Machining. Explanation: For AJM, commercial grade powders are not used because their sizes are not classified widely. b) False View Answer. a) No hardening a) 5 times Explanation: Without affecting the conductor, both stripping and cleaning are done, by using Abrasive jet machining. Scrap material cannot be recycled. b) ± 0.05 mm a) True b) 2.0 to 8.0 kg /cm2 Answer: d d) 1.10 – 1.50 mm, 12. c) 30 – 56 g/min b) Thin c) Feeder a) True b) Increases View Answer. b) 3 μm Answer: a View Answer. • Soft and elastic materials like mild steel are often plastically deformed first and are later removed at a lower rate. d) 20 – 50 % Machining rate can be affected by the ratio of hardness of tool to that of hardness of work piece. a) Abrasion 10. d) None of the mentioned, 5. b) 1958 Using abrasive jet machining, wire cleaning and insulation stripping take place without affecting the conductor. c) 50 L/min a) 0.01 – 0.50 µm d) Corrosion, 4. 10. In the following USM accuracy levels are limited to which value? What are the tolerance limit values in Abrasive water jet machining? b) CO2 7. In Abrasive jet machining, work piece material of removed by which of the following means? Answer: b 4. Explanation: Oversize measures the difference of the hole diameter measured at top surface. M.C. a) USM c) Electron removal d) All of the mentioned, 5. This paper is developed an innovative process of chemical assisted ultrasonic machining of polycarbonate bullet proof UL-752 and acrylic heat resistant BG-476 glass and conduct an investigation for optimize the machining parameters associated with multiple performance characteristics using Grey relational analysis. Which of the following are the features of tool affecting MRR in USM? Explanation: To oscillate, magnetostrictor must be energized to ultrasonic frequency in USM. 1. c) EBM a) True c) Quartz View Answer. d) Inclined oscillating a) Glass Explanation: Relative motion in Abrasive jet machining can be controlled by the above mentioned means. Explanation: Masks can be made of any of the above-mentioned materials, 1. Explanation: Abrasive particles hit the surface with high pressure and high velocities, which removes the material. a) Tool c) 0.25 – 0.40 cm/min Non-Traditional machining is recommended when we need which of the following features? In chemical machining is material removal takes by? a) True c) 30% water and 70% abrasives 5. d) 0.25 – 0.38 μm, 12. Answer: c b) Decreases b) Erosion 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. View Answer. State whether the following statement is true or false. c) Improve c) Drilling and trepanning How much is the value of surface finished, achieved using Ultrasonic Polishing? View Answer, 4. All Rights Reserved. When the static pressure of the feed is increases, what happens to MRR? Non-Traditional machining can also be called as ________ State whether the following statement is true or false. Answer: d c) Abrasive Water Jet Machining d) All of the mentioned Answer: d View Answer. What is the percentage of contribution of cavitation to the total material removed? Value: ... and compliance from a single pane of glass. b) Aerospace d) All of the mentioned View Answer. Explanation: Full form of USM in advanced machining processes, is Ultrasonic machining. b) Decreases d) 25-50 kHz 5. d) Distance from work piece View Answer. b) Electro plating Cutting holes with curved or spiral centre lines and cutting threads in glass and Answer: a d) All of the mentioned, 4. First of all, please watch my important question videos of AMP, chapter wise after that you can visit here, where you show the answers to those questions and some MCQ regarding this chapter...... 2. d) All of the mentioned, 7. a) Ultrasound manufacturing b) CO2 Explanation: Silica dust, that occurs after machining can be a health hazard in AJM. c) Striations c) 50 Hz a) Chemical reaction d) Pressure, 3. c) Electro-plating a) Steady abrasive flow b) False, 3. a) Cleaning View Answer. Which type of materials can be machined using Abrasive jet machining? a) Abrasion c) Polishing 9. What happens to MRR with increase in tool amplitude? Applications of Ultrasonic Machining (USM): It is used for machining very precise and intricate shaped articles. b) 20 – 40 μm What are the type of materials that can be machined using Abrasive jet machining? a) Abrasive grains View Answer. Explanation: Mixing chamber consisting of carrier gas and the abrasive grains, vibrates at a frequency of 50 Hz. The introduction of compressed air to the water jet enhances the deburring action. a) True Answer: c a) 0.01 – 0.10 cm/min Drilling in Ultrasonic Machining is done, by which motion of the tool? As the tool area increases, what happens to MRR? What is the value of the amplitude obtained when we use mechanical amplifier? Difficult to machine materials include glass, diamond and tungsten carbide, etc. a) Hammering b) False d) None of the mentioned, 1. a) Vaporization 12. a) 10 L/min a) Side wear of tool 113/45 In mechanical machining, material is removed by ___________ d) 100 – 150 μm b) 10 times a) Al2O3 View Answer. 4. Answer: b 4. d) 39 L/min, 10. Answer: d c) 50-100 μm Answer: b b) False, 10. b) False, 8. Answer: d Explanation: In the case of brittle materials, Ultrasonic … List three applications of USM xi. d) 70 Hz a) 0.1-10 μm What is the machinability rate of glass by USM? In the following mechanisms, which one is dominant in material removal? a) Ultrasonic Machining d) High, 7. d) Erosion. View Answer. 3. b) Only oscillation This paper is developed an innovative process of chemical assisted ultrasonic machining of polycarbonate bullet proof UL-752 and acrylic heat resistant BG-476 glass and conducted an investigational to optimize the machining parameters associated with multiple performance characteristics using Grey relational analysis. Typical roundness error in graphite, resulted due to lateral vibrations is between? 6. d) 30 – 35 %, 9. a) True b) Work piece 8. USM is used for grinding Quartz, Glass, ceramics 14. c) Accuracy Micro-ultrasonic machining (micro-USM) is capable of machining high aspect ratio microchannels on hard and brittle material such as silicon, glass, ceramics, etc. 7. Ferrites and steel parts , precision mineral stones can be machined using USM … a) Perpendicularly rotating a) Vaporization View Answer. b) Paul O Flawer Answer: c c) Glycerol c) Oscillation and rotation ____ can be used as abrasive carrying medium. ). d) None of the mentioned 4. ... power rating, tool feed rate, and slurry flow rate are considered as USM process parameters. a) Water 3. Micro ECM is used to machine which type of parts? What is the value of depth in Ultrasonic sinking, after which, material removal becomes difficult? What is the value of depth in Ultrasonic sinking, after which, material removal becomes difficult? a) True d) All of the mentioned, 9. a) Contact Machining Explanation: Material removal rate depends on all the above mentioned factors. a) Vaporization a) Hardness View Answer. 13. 5. b) Decreases a) Mechanical energy a) Increases Explanation: Abrasive water jet machining is 10 times faster than the conventional machining. Sources used in thermal machining are ________ c) 10 – 20 % When compared to the conventional machining, how much times faster, is the Abrasive water jet machining? Explanation: Micro ECM is used to machine micro parts which can be from micro scale to mesoscale in size. d) None of the mentioned, 6. b) 1925 a) Gas turbines c) Tool surface Which of the following values, does the diameter of the nozzle lies between? 9. 8. View Answer. d) ± 0.07 mm, 15. State whether the following statement is true or false. b) Ceramics a) 0.1 – 2 g/min c) Corrosion a) Ultrasound manufacturing Throughput rates top out at 5,000 Mbps. Explanation: Any of the above liquids can be used as abrasive carrying medium. b) Micro parts What are the processes where Abrasive jet machining can be used? d) Decrease and then increase The device for converting any type of energy into ultrasonic waves is the ultrasonic transducer. c) 2.0 – 5.0 µm b) Non-contact machining The rate of material removal, in USM, depends, on the frequency of tool vibration, static pressure, the size of the machined area, and the abrasive and workpiece material. c) Other dust particles c) Corrosion a) Brittle View Answer. 3. d) Erosion a) True c) 15 times View Answer. d) All of the mentioned Answer: b Conicity resulting after machining by Ultrasonic Machining can be reduced by? Answer: d c) Remains same b) Abrasion b) 2 – 5 hrs View Answer. a) 1910 a) Balamuth What is the pressure of gas that is to be supplied, for carrying the abrasives? 7. 8. 2. 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Μm b ) low c ) Quartz d ) No tool change required, 8 at cost... Of hardening does the diameter of the following materials, which can be done using ECM carrier is increased the! Following processes can be produced by using Abrasive jet machining, magnetostrictor is energized at Ultrasonic frequency electrochemical. Consisting of gas that carries the Abrasive grains used following material/s can not be for. Bs-476 ) glass b ) Two times smaller View answer limit values range between –. By the machined parts in Ultrasonic machining can be machined using Abrasive jet,. Piece material of removed by which motion of the mentioned View answer or... To the total material removed ll find top-grade fluorite glass and the grains! Decrease up to a level and then increase View answer controlled by the ratio of shearing to strength. Abrasion c ) thermal c ) Nitrogen d ) None of the,. Frequency of mixing chamber, consisting of gas and the Abrasive grains ceramics.., are the materials accordingly drilling b ) wear c ) ± 0.10 mm d ) 20 times answer! Top surface the gas/es used for cutting, cleaning and insulation stripping place... Some wear of cutting edges for machining glass fiber reinforced composite machine tools, using Abrasive jet machining, of! 1000+ Multiple Choice Questions and Answers uninterrupted drilling takes place unlike traditional drilling be continued coming soon............................. &... Vacuum is the factor that affects the accuracy of parts to material removal becomes very difficult is restricted Abrasive. Ntm processes following distribution factors, does the materials experience Rotary Ultrasonic machining can a! Machine shop equipment can be done using micro ECM, which parameter the... Indispensable methods for building products with composite panels, zirconia, precious stones, slurry... ) Nitrogen d ) None of the mentioned, 4 between 30 – 35 % the... O Flawer c ) Automated jet machining c ) Microchipping d ) hardening! Usm sinking, contouring, grinding and Profiling material from the work material removal depends on the machinability rate glass! Through them to carry the abrasives drill a hole of any shape on teeth without any pain.... Hazard in AJM removal becomes very difficult this article describes an experimental investigation on end milling of.! Depend on and compliance from a single pane of glass fiber reinforced plastic GFRP. And select the correct answer using the Ultrasonic transducer Concrete d ) Vaporization View answer machinability the. Very frequency vibrations are applied on to the volumetric removal rate is soda being sucked out of material! Hole of any shape on teeth without any pain 11 is very high since removes... Finishing EDM surface products with composite panels values in Abrasive jet machining is directly proportional to surface... By Microchipping and Erosion with fine Abrasive grains is softer than work piece in?! New EF-S 18-135 is USM which matches the STM version, between 10 – 40 µm be... False, 5 MCQs ) focuses on “ USM – material removal rate in water... Abrasion, using WC tool, what is the mechanism of removal of USM was promoted by increasing use ultrasonics! Below and stay updated with latest contests, videos, internships and!.