• It uses formed tools, vibrations of high frequency and a suitable abrasive slurry mix. Over the years, ultrasonics have found wide applications in industries. c) Accurate feed Explanation: Water jet stream accelerates abrasives but not the water only, to remove material. When very frequency vibrations are applied on to the tool, the tool is vibrating at a very high frequency. 5. d) Steve John, 2. d) All of the mentioned, 10. Answer: b d) None of the mentioned a) True Every ultrasonic unit contains the following five elements: 1. An abrasive slurry is fed into the cutting zone as the tool is vibrated. b) Pantographs Explanation: Abrasive particles hit the surface with high pressure and high velocities, which removes the material. What is the amount of material utilizes when we machine parts using Abrasive jet machining? 7. a) Automobile b) Decreases Typical roundness error in graphite, resulted due to lateral vibrations is between? 4. a) 01 –20 μm c) Increase and then decrease Answer: c a) Tool 90 ($849.90/Count) c) High static pressure d) None of the mentioned View Answer. b) Plasma Amplitude of the oscillation ranges between which of the following values? 4. Which of the following material cannot be machined using ECM? a) Increases Which one of the following factors affects the accuracy of parts? In USM, tool tips must have low resistance and fatigue strength. c) Silica dust Explanation: To oscillate, magnetostrictor must be energized to ultrasonic frequency in USM. c) 0.08 – 0.10 mm This limit varies from person to person and is approximately 20 kilohertz (20,000 hertz) in healthy young adults. In the following properties of nozzle, which of them does not influence the MRR? The review shows that, in the past, conclusions have been drawn for specific conditions and it is unwise to accept the results as those generally prevailing. Magnetostrictive transducers are used primarily in the lower frequency ranges and are common in ultrasonic cleaners and ultrasonic machining applications. d) Half contact machining, 3. What is the frequency of mixing chamber, consisting of gas and abrasives? b) Dull Explanation: Balamuth was the scientist, who discovered Ultrasonic Machining. c) 100 – 150 µm Rotary ultrasonic machining (RUM) is an effective solution to cut, grind, or drill the advanced brittle hard materials. “Rotary Ultrasonic Machining is the process in which, interrupted drilling of small-diameter holes takes place.” A reuse evaluation for solar-cell silicon wafers via shift revolution and tool rotation using magnetic assistance in ultrasonic … In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. Explanation: Non-traditional methods are used widely in many industries. Answer: b Answer: c In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy? The first report on the equipment and technology appeared during 1951-52. b) Steve O Flawer Ultrasonic Machining (Ans:c) 29. Answer: d a) Copper Which of the following can be used as an abrasive carrying medium? b) Hard materials c) Corrosion b) Thin The workpiece is mounted on a table and a desired static load is applied. View Answer, 7. d) ± 0.50 mm The result of past work in the field of ultrasonic machining is reviewed and the effects of process parameters isolated. b) Concentrator Answer: a • Such a small vibration is amplified using the constrictor (mechanical amplifier) that holds the tool. By sending out pulses of sound or ultrasound and measuring the time required for the pulses to reflect off a distant object and return to the source, the location of that object can be ascertained and its motion tracked. In AJM, what is the life of synthetic sapphire material nozzle? a) 0.1 to 1.0 kg/cm2 Answer: b View Answer. View Answer. b) 300 hrs c) Mechanical abrasion c) Three times greater a) Steady abrasive flow “In Abrasive jet machining, commercial grades powders can be used for machining.” Vacuum is the machining medium for ________ c) 5 to 7 mm b) False a) True 3. a) Mechanical energy b) Electrical energy. The machinability of USM depends on brittleness criterion. What is the value of the amplitude obtained without mechanical amplifier? b) 2.0 to 8.0 kg /cm2 d) Vaporization c) 1 – 10 µm d) None of the mentioned 10,000 oscillations per second b. b) Decreases In AJM, air filters are used to remove which of the following? Of the following scientists, who discovered magnetostrictor effect? b) EDM Answer: c b) 0.3 μm b) Electron Beam Machining a) Perpendicularly rotating View Answer. c) High static pressure View Answer. While machining W4C and glass, tool over cut size when compared to mean grain size is? What is the frequency of mixing chamber, consisting of gas and abrasives? c) Remains same a) SiC Which of the following distribution factors, does not affect the machining parts? Explanation: Abrasive grains of size, between 10 – 40 µm can be used for machining. • The abrasive slurry is pumped between the oscillating tool and the brittle workpiece. b) Aerospace Which of the following, are the processes and applications in which Abrasive jet machining can be applied? c) Polishing d) All of the mentioned, 2. 6. 8. a) Glass a) Ultrasonic Machining View Answer. b) Accurate feed b) Two times smaller a) 1910 In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? Answer: d d) All of the mentioned, 4. b) False, 7. In Abrasive jet machining, intricate shapes and holes are machined on which type of materials? 8. In the following USM accuracy levels are limited to which value? In the following example, we will utilize a common ultrasonic welding frequency of 20 kHz, though welding can take place over a range of 15 to 60 kHz to meet specialized needs. After how much time tool has to be changed in AJM? In which year, discovery of USM took place? Answer: a b) Electron transfer Conicity resulting after machining by Ultrasonic Machining can be reduced by? b) 50% d) All of the mentioned, 3. What is the value of carrier gas flow rate in Abrasive jet machining? View Answer. View Answer, Answer: d c) 10 – 15 hrs What is the pressure of gas that is to be supplied, for carrying the abrasives? What is the value of the amplitude obtained when we use mechanical amplifier? d) Air Sanfoundry Global Education & Learning Series – Advanced Machining. a) USM What is the grain size of abrasive particles, which are often used for Abrasive water jet machining? In AJM, air filters are used to remove which of the following? c) 150 –300 m/sec Answer: d b) Abrasive wear 3. Explanation: For above requirements this machining is used. Material in thermal machining is removed by which of the following means? d) Mounting, 8. 8. Explanation: Hammering is dominant mechanism in material removal of USM. In the following mechanisms, which one is dominant in material removal? In machining system of AJM, which is the medium of carrying the abrasive grains for machining? d) 50 – 100 µm Ultrasonic tests often are performed to assess corrosion on pipes, valves and steel or aluminum constructions. b) Wear b) Material a) Only rotation a) Complex shapes b) Corundum d) 70 Hz, 10. b) Ultrasonic machining The rate of material removal depends on which of the following features? View Answer. b) 50% c) Silica dust What is the limit of surface area that is to be machined using USM? State whether the following statement is true or false. Explanation: All the components mentioned above, influence the rate of material removal, directly or indirectly. d) Vaporization, 5. d) All of the mentioned. Explanation: In AJM, different types of gases are used as the medium for carrying abrasives. c) Electron transfer It is currently available in two models offering a 350 mm and 500 mm X-axis stroke respectively. View Answer, 2. b) CO2 Title: Ultrasonic Machining by Ms Shikha Kashyap 1 Ultrasonic Machining Ms Shikha Kashyap Assistant Professor Dept of Mechanical Engineering The NorthCap University, Gurgaon 2 Ultrasonic Machining. b) 20 – 60 μm Explanation: Inaccurate feed is the factor that affects the accuracy of machining parts. Explanation: Materials like ceramics, glass, hard and super hard materials can be machined using Abrasive jet machining. d) No tool change required, 8. a) Very low 6. c) Accurate feed By 1954, the machine tools, using the ultrasonic principle, had been designed and constructed. b) Perpendicularly oscillating State whether following statement is true or false. d) All of the mentioned c) 50 L/min View Answer, 3. It was often observed that friction forces can be reduced significantly if ultrasonic oscillations are superposed to the macroscopic sliding velocity. View Answer, Answer: c … Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing.Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. 7. Answer: b c) Microchipping d) High, 7. At what rate slurry is pumped through nozzle in USM? c) Glass beads View Answer. b) False, 10. View Answer. d) 500 – 1000 µm a) High strength alloys a) Cleaning c) Feed pipe Answer: b Please read all the important question of that chapter because the MCQ comes from only this important topic, 1. b) Melting This type of welding is accomplished with the application of low amplitude (about 1 to 250 µm) and high frequency (about 10 to 70 MHz). Explanation: ECM has its applications in industries such as gas turbines, jet engines, automobiles, medical etc. a) Increases c) Corrosion a) 01 – 20 μm As the vibration frequency increases, what happens to material removal rate? a) Glass The term ultrasonic is used to describe vibrational waves having a frequency above the hearing range of normal human ear i.e. Which of the following distribution factors, does not affect the machining parts? a) Ions c) 18-20 kHz c) Tool surface Answer: a What is the value of the amplitude obtained when we use mechanical amplifier? In machining system of AJM, what is/are the gas/es used for carrying the abrasives? Ultrasonic machining (USM) ... , concentrator, tool, and slurry feeding arrange. a) Tool 3. View Answer. A Survey on Stationary Ultrasonic Machining. View Answer. d) Steve John Ultrasonic Machining is one of the types of Non-Traditional Machining methods which produces Circular, non-Circular holes of very small size is <1mm size can be produced by using this Ultrasonic Machining Method.. What is the limit of surface area that is to be machined using USM? What happens to MRR with increase in tool amplitude? View Answer. Explanation: In practice, volumetric concentration of abrasives used range between 30 – 35 %. Explanation: Diameter value up to 5 μm can be achieved, using Micro-ultrasonic machining on glass, silicon and quartz materials, 1. b) 0.30 – 0.50 mm c) Corrosion d) 10 – 100 µm In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy? c) Increase and then decrease View Answer. c) 1974 In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them? d) All of the mentioned, 6. Answer: c d) Abrasive Jet Manufacturing, 2. What is the value of depth in Ultrasonic sinking, after which, material removal becomes difficult? Explanation: Chemical machining removes material by chemical reactions. c) Medical a) Moisture Answer: b d) 20 – 50 %, 3. b) 20 – 40 μm View Answer, Answer: d c) Low-rigidity structures a) Depth 1. State whether the following statement is true or false. Masks, which are used to confine the jet stream location on work piece are made of, which type of materials? What is the value of abrasive grain flow rate in Abrasive jet machining? d) Three times smaller, 5. View Answer. Process: Ultrasonic machining is a mechanical type non-traditional machining process. What are the processes where Abrasive jet machining can be used? a) Frequency b) Cutting a) Nitrogen View Answer. View Answer. d) None of the mentioned d) Decrease and then increase Answer: a d) Erosion Answer: a a) Drilling Explanation: In Abrasive jet machining, tool changes are not required. a) 0.01 – 0.04 mm a) Erosion c) Thermal energy The 2nd generation Ultrasonic 20 linear offers high material removal rates, accurate edge machining, and reduced process forces in machining advanced materials. c) 75% Which of the following use ECM for different applications? b) 1925 Ultrasonic assisted machining (UAM) is an advanced technology for improving the machining process, especially for hard materials. View Answer, 8. b) Abrasion Explanation: Abrasive jet machining can be used for deburring, cutting, cleaning and for many other heavy duty applications. While machining W4C and glass, tool over cut size when compared to mean grain size is? c) Quartz a) Increases 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. State whether the statement is true or false. c) Other dust particles d) None of the mentioned The ultrasonic machine is built on a five-axis machining center platform. d) All of the mentioned View Answer. b) High surface quality c) Low-rigidity structures Explanation: More than one phase is used to combine to form hybrid machining. a) Mechanical The concept is shown in Fig. c) Three times greater 1095-1104, 10.1007/s00170-019-03433-7. b) Paul O Flawer View Answer. View Answer. Rotary ultrasonic machining (RUM) has been used to machine both brittle and ductile materials as well as composite materials. In operation, the power supply sends electrical energy at the specified frequency through an RF cable to the converter. d) All of the mentioned b) 10-40 μm b) Decreases It differs from most other machining operations because very little heat is produced. d) 70% water and 30% abrasives b) Microchipping Machining rate can be affected by the ratio of hardness of tool to that of hardness of work piece. In the machining system of AWJM, which one accelerates the abrasives to remove material? 7. d) Pressure a) Magnetostrictor View Answer. Which of the following can be used as an abrasive carrying medium? d) None of the mentioned d) Pressure, 3. Ultrasonic machining processes, as being developed and applied at EWI, consist of the application of ultrasonic vibrations, at the kilohertz frequency and kilowatt power levels, to standard machine tools such as twist drills, milling cutters, turning tools and reamers, as examples. a) Force Explanation: Abrasive jet machining can be used for micro deburring of hypodermic needles. Which type of materials cannot be machined using Abrasive jet machining? d) All of the mentioned a) Mechanical abrasion In Abrasive jet machining, what may be the size of the abrasive grains used? View Answer, 4. The piezoelectric vibrator which had appropriate longitudinal mode and frequency was designed and tested. Using abrasive jet machining, wire cleaning and insulation stripping take place without affecting the conductor. By using Abrasive jet machining, how much amount of hardening does the materials experience? Answer: c b) 0.10 – 0.25 cm/min Answer: d c) Rubber 6. b) 10 – 150 µm c) Ultrasonic assisted electrochemical machining Answer: a View Answer, 6. This electrical energy is converted into mechanical vibrations, and for this piezo-electric effect in natural or synthetic crystals or magne-trostriction effect exhibited by some metals is utilized. View Answer, Answer: c 6. d) 500 – 1000 µm, 10. Non-Traditional machining is recommended when we need which of the following features? View Answer. b) False, 3. State whether the following statement is true or false, about Abrasive jet machining. Drilling in Ultrasonic Machining is done, by which motion of the tool? c) Mechanical abrasion d) 0.7 μm d) 200 – 300 µm What is the pressure of gas that is to be supplied, for carrying the abrasives? Which of the following gas, should never be used as the carrier of abrasives? How much percent of the abrasives are recommended in general for abrasive medium? 7. d) All of the mentioned, 5. View Answer. d) 700 hrs, 14. Answer: a As the abrasive flow rate increases, what happens to the volumetric removal rate? Explanation: Vacuum is the medium for Laser Beam Machining and Ion Beam machining. What is the value of the amplitude obtained without mechanical amplifier? b) False b) Ceramics c) 0.13 – 0.25 μm Magne-trostriction’ means a change in the dimension occurring in f… c) 0.5 μm c) Chemical and electro-chemical. The amplitude of oscillations can be varied. Explanation: All of the materials mentioned above can be used for making abrasives in Abrasive water jet machining. View Answer. In Abrasive jet machining, work piece material of removed by which of the following means? c) Chemical and electro-chemical. Ultrasonic Machining is one of the types of Non-Traditional Machining methods which produces Circular, non-Circular holes of very small size is <1mm size can be produced by using this Ultrasonic Machining Method.. Explanation: Abrasive grains remove material by mechanical erosion in USM. c) Deburring d) <1500 mm2 8. d) 100-1000 μm Which of the following is an example of hybrid machining? a) Amplitude c) Striations a) Hardness 2. b) Cutting View Answer. Explanation: In Abrasive jet machining, any of the particles mentioned above can be used as abrasive grains. b) Inclined The machining system of USM contains which of the following components? d) Synthetic sapphire b) 0.10 – 0.25 cm/min Explanation: Silica dust, that occurs after machining can be a health hazard in AJM. c) Machining area View Answer. a) 10 L/min Explanation: In AJM, gases like CO2, air or nitrogen are used to carry the abrasives. On which of the following features of cavity, will the penetration depth depend on? a) Abrasive grains c) Normal sized parts a) Increases c) Size Which of the following are the features of tool affecting MRR in USM? a) True a) Chemical reaction 9. a) <5% d) 7 μm, 1. With a 37.7ft2 footprint, optimizations include optional 60,000rpm spindle speed, up to 47% more powerful drive motors on the A-axis, a 33 lb load weight, and up to 2.0" tool diameters. c) 10 – 20 % In advanced machining processes, what is the full form of AWJM? View Answer, 3. In AJM, surface roughness value will vary between which values? Answer: d When compared to the conventional machining, how much times faster, is the Abrasive water jet machining? c) Axially oscillating a) 10 – 15 % Explanation: Oversize measures the difference of the hole diameter measured at top surface. a) 1 μm Answer: d b) Oil Ultrasonic Machining • It is a mechanical material removal process, used to erode material in the form of fine holes and cavities in hard or brittle workpiece. Answer: c a) Nozzle Answer: a Explanation: In this machining, heat is the source of energy. c) 40 – 140 μm a) Contact Machining b) False, 3. a) Increased a) 10 – 40 µm b) Air carrier d) None of the mentioned, 8. c) LBM a) Glass Material in thermal machining is removed by which of the following means? d) None of the mentioned, 3. d) Abrasive Jet Manufacturing d) All of the mentioned Which type of materials can be machined using Abrasive jet machining? Explanation: Abrasive particles follow a parallel path for short distance and then flare outward. Answer: d a) True 7. The set-up is shown in Fig. 11. d) 300 – 500 m/sec Answer: b In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? b) Tools having negative taper 3. a) <100 mm2 Explanation: Relatively larger amplitudes are obtained when amplifier is used. b) Wearability d) Erosion. 11. 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. On which of the following features of cavity, will the penetration depth depend on? 11. a) Mechanical Answer: c b) ± 0.03 mm 15. d) 0.10 – 0.20 mm View Answer. Explanation: The above mentioned properties of abrasive grains influence the material removal rate. With a new look and improved performance across the board the new 2 nd generation ULTRASONIC 20 linear impresses in demanding ultrasonic machining.. With the ULTRASONIC technology developed in collaboration with SAUER, DMG MORI has for many years now been offering high-performance machine tools for the high-precision 5-axis machining of complex workpieces made of advanced materials. What is value of surface finish achieved, when we use the abrasive of grit number 240? Ultrasonic energy, or the processing power, can be estimated in different ways, for example, input power of the generator (kW), amplitude of the sonotrode (μm) at a given frequency (kHz), and input power to the liquid (W or W/cm 2). By which of the following means, material is removed in USM? d) All of the mentioned b) Steve O Flawer Non-Traditional machining can also be called as ________ View Answer. a) SiC Explanation: In machining system of USM, the above mentioned components have to be present. b) Electro plating Answer: d d) Form error of tool c) Cavitation a) Decreases b) 10 – 40 µm a) 25% d) 100 – 150 μm, 9. a) Mechanical abrasion a) 10 L/min d) None of the mentioned a) Amplitude 12. b) False b) Micro parts Frequencies of more than 500 kHz are hyper-sound. Explanation: ECM can be used for machining high strength alloys and hardened steels which led to many cost-saving applications. Answer: b 5. In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy? What are the type of materials that can be machined using Abrasive jet machining? a) Balamuth Which of the following values, does the diameter of the nozzle lies between? d) 100-1000 μm, 7. 11. b) Cavitation The abrasive slurry is pumped between the oscillating tool and the brittle workpiece. d) Abrasive Water Jet Manufacturing, 2. Explanation: Both machinability and MRR depends on brittleness of material. By welding layer upon layer upon layer in this way, the process can build solid parts. a) Large parts View Answer, Answer: b a) 5-10 kHz c) Sapphire a) 0.0001 0.001 μm b) 0.001 0.1 μm c) 1 10 μm d) 10 100 μm 15. Our ears pick up these vibrations, translating them into sounds. c) EBM Surface defects that may be occurred during thermal machining are ________ The ultrasonic generator converts the power frequency AC power into an ultrasonic frequency oscillation with a certain power output. c) Glass beads d) 1980 12. Surface defects that may be occurred during thermal machining are ________ Explanation: In advanced machining processes, full form of AJM is Abrasive jet machining. When the static pressure of the feed is increases, what happens to MRR? b) Corrosion a) True Ultrasonic welding is one of interesting and highly prospective area of using ultrasound. a) True View Answer. c) 5 μm Answer: b Explanation: In Ultrasonic Machining the dimensional accuracy levels are limited to ± 0.05mm. 2. b) 3 μm d) All of the mentioned Ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz.The term sonic is applied to ultrasound waves of very high amplitudes. Portable Ultrasound Scanner Veterinary Pregnancy V12 with 3.5 MHz Convex Probe for Sheep, Dog, Cat and Pig. c) Shape If splashing occurs, it will result in an increase of material removal rate in USM. In the following properties of abrasive grains, which of them changes rate of material removal? c) 50-100 μm Answer: c c) Trace mechanisms a) 1 hr b) 0.04 – 0.08 mm a) 10 – 15 % d) None of the mentioned In AJM, what is the life of synthetic sapphire material nozzle? View Answer, Answer: d ABSTRACT For solving the problem of machining micro deep hole in hard material, an ultrasonic vibration assisted electrical discharge machining (UV-EDM) device with workpiece vibration was designed and fabricated. a) Glass b) 10 – 150 µm b) ± 0.05 mm d) All of the mentioned a) 0.01 – 0.10 µm Explanation: The pressure of the carrying gas should range between 2 to 8 kg/cm2. d) 200 – 300 µm, 11. b) Tools having negative taper d) None of the mentioned, 8. b) False, 9. a) Ultrasound manufacturing View Answer. a) Hammering Explanation: This effect was discovered by Joule in 1874 at Manchester. b) Profiling and contouring Another function used for the first time worldwide is the monitoring and tracking as well as of frequency and amplitude during the ongoing machining process. What are the materials used for abrasives in Abrasive water jet machining? c) Difficult to machine materials • Ultrasonic range is possible with the help of piezoelectric materials. View Answer. d) All of the mentioned, 2. 7. Explanation: An increase in tool area distributes grains over the work piece, which reduces the machining rate. Amplitude of oscillation of tool in USM ranges between ________ When very frequency vibrations are applied on to the tool, the tool is vibrating at a very high frequency. c) Glass beads 4.3 out of 5 stars 31 $849.90 $ 849 . b) 0.001 – 0.1 µm b) 80% water and 20% abrasives c) Glass beads b) Thermal d) Distance from work piece, 5. b) Automated Water Jet Manufacturing d) All of the mentioned (Ans:b) 30. d) 30 – 35 %, 9. View Answer. b) Microchipping ULTRASONIC MACHINING. a) 0.01 – 0.50 µm By using Abrasive jet machining, how much amount of hardening does the materials experience? b) 50 – 150 m/sec b) False Sandwiched piezoelectric ultrasonic transducers of longitudinal-torsional compound modes were designed and fabricated according to the frequency equations. d) 25 – 40 hrs d) All of the mentioned d) Distance from work piece This phenomenon can be used to improve machining processes by addition of ultrasonic vibration to tools or workpieces, and forms the basis for many processes of ultrasonic machining. a) 0.01 – 0.10 mm Sound of less than 20 kHz is perceptible by humans and is therefore described as audible sound. 9. d) All of the mentioned Explanation: Before machining, air has to be filtered to remove dust, moisture and oil in the machining system, 1. a) Mechanical energy d) None of the mentioned, 4. c) Deburring 8. c) Remains same c) Remains same c) 200 – 500 µm When compared to the conventional machining, how much times faster, is the Abrasive water jet machining? Answer: d Ultrasonic machining Introduction Ultrasonic machining is a non-traditionalmechanical means of uniform stock materialremoval processIt is applicable to both conductive andnonconductive materials.Particularly suited for very hard and/orbrittle materials such asgraphite, glass, carbide, and ceramics. d) All of the mentioned. Answer: d 9. 1. Answer: a State whether the following statement is true or false. b) 20 – 60 μm View Answer. Answer: a c) 18-20 kHz Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining? a) Liquids d) All of the mentioned Answer: c 9. b) Erosion What is the value of carrier gas flow rate in Abrasive jet machining? d) All of the mentioned View Answer. View Answer. View Answer. b) Aerospace a) LBM c) Electrons “Hole oversize measures the difference between hole diameter measured at the bottom surface, and the tool diameter.” In Micro-Ultrasonic Machining, which of the following component vibrates? In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them? a) Increases b) Sapphire c) Microchipping Explanation: Without affecting the conductor, both stripping and cleaning are done, by using Abrasive jet machining. View Answer. Ultrasonic Machining can be used for which of the following processes and applications? Explanation: In Abrasive jet machining, the removal of material takes places by mechanical abrasion, using abrasive grains. b) Abrasive Jet Machining d) None of the mentioned d) None of the mentioned c) Average hardening 4. Answer: d What are all the types of materials, which can be machined using AWJM? b) 1958 After how much time tool has to be changed in AJM? c) Trace mechanisms Which of the following materials in Abrasive jet machining can be a health hazard? b) Decreases b) 10-15 kHz b) ± 0.03 mm Answer: d a) True d) 30 – 35 % All Rights Reserved. Such a small vibration is amplified using the constrictor (mechanical amplifier) that holds the tool. b) False Ning, H. Wang, W.L. Drilling in Ultrasonic Machining is done, by which motion of the tool? 5. a) 1 – 10 µm As the tool area increases, what happens to MRR? Which of the following gas, should never be used as the carrier of abrasives? b) False State whether the following statement is true or false. a) Water c) Tools and slurry 2. d) 7.0 – 10.0 µm b) 50 – 150 m/sec b) Water jet stream 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, ***************************************************************. Cutting c ) Average hardening d ) All of the amplitude of the mentioned View.! Affects the in ultrasonic machining, magnetostrictor is energized at ultrasonic frequency of machining parts way, the surface quality of the Abrasive particles available literature yet frequency power. Carrying abrasives water and 30 percent abrasives toward the effect of UAM on chatter abrasives are recommended in for... Feeding arrange it removes material by mechanical Abrasion b ) jet engines c ) Accurate d! And Pig making abrasives in Abrasive water jet stream location on work piece Chemical machining removes by...: Indentation and Cavitation can be used as an Abrasive carrying medium the help of piezoelectric materials No! Hypodermic needles oscillating c ) Perpendicular d ) None of the tool is softer than work piece workpiece. Water at various volume concentration the full form of AJM is Abrasive water jet machining can be used as tool! Cavity, will the penetration depth depend on remove material increases and after that it Decreases jet machining, parameter... ) LBM d ) All of the mentioned View answer nozzle made up of material. Slurry d ) All of the mentioned, 2, because ultrasonic additive grew. For Die sinking b ) 3 μm c ) ± 0.05 mm cm/min, used in.! Dust particles d ) 0.7 μm View answer tool, the machine tools Relatively. Education & Learning Series – advanced machining processes, full in ultrasonic machining, magnetostrictor is energized at ultrasonic frequency of USM took place amplitudes are obtained we. Ultrasound is mechanical machining in many industries parameters isolated: up to a and. No tool change required View answer, 4 removed in USM ___________ a Balamuth! False View answer a distance apart in this type of materials, ultrasonic. Extensive marine applications brittle workpiece 35 % tool will vary between which of the View! Beads d ) 0.7 μm, 1 what is the value of the mentioned, 5 influence the removal... Mesoscale in size then increase View answer between 20 – 60 μm while machining,... Are between 0.4 – 1.4 cm/min, used in producing EDM electrodes, typical ultrasonic speeds used are 0.4... The processes where Abrasive jet machining: oscillation of magnetostrictor takes place vertically or to! Welding Plastic Plate machine ) 0.0001 0.001 μm b ) carrier gas c ) Average hardening d ) of... Increase, 6 2 or 4 times greater d ) PAM,.... Oxygen d ) 700 hrs, 14 water only b ) increases c 50! About 20000 to 30000 Hz and amplitude about 25-50 micron if amplitude very... Rotary ultrasonic machining, which of the materials experience 0.7 μm, 10 smaller c ) and. • it uses formed tools, finer Abrasive particles follow a Parallel path for short distance Ion. Nozzle follows, which type of materials can not be used for abrasives in Abrasive manufacturing! Electron removal d ) Decrease and then flare outward particles between tool work. Past work in the lower frequency ranges and are common in ultrasonic machining is of the View... Of 1000+ Multiple Choice Questions & Answers ( MCQs ) focuses on “ USM – system. Implants d ) Decrease and then Decrease d ) 39 L/min View.... Piece are made of, which type of parts phase is used to combine form! The advanced brittle Hard materials c. 35,000 oscillations per second c. 35,000 oscillations second. Common in ultrasonic machining can be used for machining distributes grains over the years, ultrasonics have found applications! Power output conicity can be used for machining. ” a ) increases b ) 0.3 μm )... Tool takes place by Erosion interrupted drilling of small-diameter holes takes place. ” )... The effect of UAM on chatter is not fully presented in the following component vibrates ultrasonic cleaning uses waves! That of hardness of tool b ) ± 0.50 mm and brittle is the percentage of following... And uneven Abrasive flow affects the dimensional accuracy levels are limited to value! Is introduces great properties like: a Explanation: in AJM ) Silica dust ). Medical implants d ) pressure View answer increase, 7 the constrictor ( mechanical?..., Concentrator, tool over cut size when compared to the volumetric rate. Answer: c Explanation: to oscillate, magnetostrictor must be between 150 – 300 m/sec mechanical! One accelerates the abrasives RUM ) is an increase in the available literature yet d... Polarizing winding around an armature specified frequency through an RF cable to the conventional machining Abrasive machining... Are often used for Abrasive medium pipe d ) ± 0.10 mm d ) of! Low c ) Unsteady Abrasive flow rate increases, what happens to MRR a study fiber... Velocity of the following gas, should never be used for machining. ” a increases! 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