c) 200 – 500 µm Which of the following can be used as an abrasive carrying medium? 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. d) PAM 2. 3. d) Abrasive Water Jet Manufacturing a) High strength alloys 2. c) Concrete b) Decreases c) Electro-plating What is the frequency of mixing chamber, consisting of gas and abrasives? a) 5 times In Micro-Ultrasonic Machining, which of the following component vibrates? b) 80% water and 20% abrasives c) Perpendicular Which type of materials cannot be machined using Abrasive jet machining? c) Outside temperature c) 2.0 – 5.0 µm 5. c) 10.0 to 18.0 kg/cm2 State whether the statement is true or false. Amplitude of oscillation of tool in USM ranges between ________ a) Only rotation c) Abrasive grains a) Vaporization Which type of materials can be machined using Abrasive jet machining? Sources used in thermal machining are ________ b) Heat affected zones c) <1000 mm2 a) Glass View Answer, Answer: c View Answer, 3. In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them? d) ± 0.07 mm, 15. b) 20 – 40 μm a) True a) Hardness c) Ferrite ultra sonic machining Please read all the important question of that chapter because the MCQ comes from only this important topic, 1. Ultrasonic Machining is a non-conventional machining process in which the Harder material is machined. Join our social networks below and stay updated with latest contests, videos, internships and jobs! c) 60 – 100 μm Answer: c d) All of the mentioned c) 28 L/min b) Heat affected zones a) 01 –20 μm View Answer. c) 0.08 – 0.10 mm Material in thermal machining is removed by which of the following means? d) Vaporization, 5. c) Other dust particles Answer: d c) ± 0.10 mm View Answer. b) 20 – 40 μm b) Cutting View Answer, Answer: d c) Silica dust b) 10-15 kHz Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining? a) Hammering b) Diameter a) 10 Hz View Answer, 6. Explanation: The outside temperature of nozzle has no influence on the material removal rate. 6. Explanation: To oscillate, magnetostrictor must be energized to ultrasonic frequency in USM. d) 100%, 1. d) No tool change required, 8. d) 150 – 250 μm Conicity resulting after machining by Ultrasonic Machining can be reduced by? c) Increase and then decrease 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. a) 1 μm Explanation: Balamuth was the scientist, who discovered Ultrasonic Machining. 4. d) 75 L/min c) UV spectrum manufacturing a) 0.01 – 0.10 µm View Answer. a) 0.01 – 0.08 μm 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. 8. Answer: b As the abrasive flow rate increases, what happens to the volumetric removal rate? Explanation: Materials like ceramics, glass, hard and super hard materials can be machined using Abrasive jet machining. b) Perpendicularly oscillating a) True Answer: d What is the life of Tungsten carbide material nozzle? d) 1945 4. b) Switching the pulse current 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). d) All of the mentioned, 3. The experiments of ultrasonic drilling were conducted on an 800 W ultrasonic drilling machine with tuned frequency of 20 KHz. a) Increases b) High surface quality c) Nitrogen d) All of the mentioned, 7. Non-Traditional machining is recommended when we need which of the following features? In production of EDM electrodes, typical ultrasonic speeds, in graphite ranges between? a) Two times greater c) Difficult to machine materials b) Strength Which one of the following factors affects the accuracy of parts? a) Perpendicularly rotating View Answer, Answer: c a) Balamuth b) Steve O Flawer c) Joule d) Turing View Answer Explanation: Inaccurate feed is the factor that affects the accuracy of machining parts. 6. State whether the following statement is true or false, about Abrasive jet machining. c) Size a) 0.0001 – 0.001 µm b) 10-40 μm a) Vaporization a) True d) 150 – 250 μm, 10. b) 0.10 – 0.25 cm/min d) None of the mentioned d) All of the mentioned In advanced machining processes, what is the full form of AWJM? a) Abrasive grains Various work samples machined by USM1- The first picture on the left is a plastic sample … In USM, tool tips must have low resistance and fatigue strength. Which of the following gas, should never be used as the carrier of abrasives? b) Electrical energy b) Strength What are the processes where Abrasive jet machining can be used? The power rating of machine is about 0.2 to 2.5 kW. d) All of the mentioned b) 5 – 10 % View Answer. a) Decreases c) 1 – 10 µm Which type of materials cannot be machined using Abrasive jet machining? 2. What is the amount of material utilizes when we machine parts using Abrasive jet machining? c) 100 – 150 µm d) None of the mentioned Of the following scientists, who discovered magnetostrictor effect? b) EDM View Answer. “ULTRASONIC Parameter Detection” of the ULTRASONIC 20 linear ensures automatic detection of the ultrasonic frequency most suitable for the actuator and tool with powerful functions for process monitoring. Frequency of tool’s oscillation in USM ranges between ________ With the help of 4BEngineers, students can avail online coaching through video lecture at an unimaginably affordable cost, access the coaching content from renowned teaching experts, and be one on one with their personal favorite coach. 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) True d) 300 – 500 m/sec Explanation: Water jet stream accelerates abrasives but not the water only, to remove material. d) 20 – 50 % c) Remains same d) Abrasive Jet Manufacturing, 2. d) 0.7 μm, 10. Which of the following materials in Abrasive jet machining can be a health hazard? Answer: a Explanation: To oscillate, magnetostrictor must be energized to ultrasonic frequency in USM. b) Diameter Explanation: Surface roughness value in AJM varies between 0.15 – 1.5 µm, depending on grain size, 1. c) Rubber d) 1.10 – 1.50 mm c) Nonconductive materials Machining rate can be affected by the ratio of hardness of tool to that of hardness of work piece. c) 500 hrs d) 7 to 10 mm, 8. Sound of less than 20 kHz is perceptible by humans and is therefore described as audible sound. Ning, H. Wang, W.L. Explanation: Both machinability and MRR depends on brittleness of material. State whether the following statement is true or false. Answer: c a) True Answer: a b) Melting What is the grain size of abrasive particles, which are often used for Abrasive water jet machining? Answer: b b) Steve O Flawer a) 25% 1095-1104, 10.1007/s00170-019-03433-7. c) 60 – 100 μm a) 0.1 μm c) High static pressure Answer: b d) All of the mentioned, 4. What is the full form of USM in advanced machining process? Non-Traditional machining can also be called as ________ Ultrasonic welding is one of interesting and highly prospective area of using ultrasound. a) Vaporization The machining system of USM contains which of the following components? b) False When very frequency vibrations are applied on to the tool, the tool is vibrating at a very high frequency. View Answer. d) 1.10 – 1.50 mm, 12. c) Average hardening c) Joule Explanation: All of the materials mentioned above can be used for making abrasives in Abrasive water jet machining. View Answer. ULTRASONIC MACHINING. b) Microchipping 4. c) 50 Hz Answer: a c) Remains same Answer: b Which of the following gas, should never be used as the carrier of abrasives? c) 50 L/min b) Benzene Explanation: Without affecting the conductor, both stripping and cleaning are done, by using Abrasive jet machining. Explanation: Tool and work piece are at a distance apart in this type of machining. a) 1 – 8 hrs Answer: c d) Laser Beam Machining, 1. Who discovered USM? b) 2 hrs c) Power supply d) All of the mentioned, 6. In the following mechanisms, which one is dominant in material removal? Answer: b a) Automatic Jet Manufacturing Frequencies of more than 500 kHz are hyper-sound. Answer: c c) Abrasion Ultrasonic Machining (USM) and Ultrasonic Machining Tool: The use of ultrasonics in machining was first proposed by L. Balamuth in 1945. c) ± 0.05 mm d) None of the mentioned, 2. 1. a) Abrasion Explanation: Soft materials such as candy bars, thin softwood etc.., cannot be machined using AJM. a) Glass a) 1 – 8 hrs b) Increases Explanation: Splashing occurs if amplitude is very high which in turn decreases the material removal rate. d) Steve John Explanation: In Abrasive jet machining, the above mentioned materials can be machined, which are heat sensitive and brittle. c) Ultrasonic assisted electrochemical machining a) 1910 c) Three times greater 10,000 oscillations per second b. c) Glass beads By 1954, the machine tools, using the ultrasonic principle, had been designed and constructed. State whether the following statement is true or false. The ultrasonic machining units are available as cutting heads for mounting on machine tools. On which of the following features of cavity, will the penetration depth depend on? c) UV spectrum manufacturing The set-up is shown in Fig. a) Cam drives 8. d) None of the mentioned All Rights Reserved. All the operations done with the ultrasonic machining method are cost effective and best in results. a) Steady abrasive flow All in one - ULTRASONIC hard machining of Advanced Materials and HSC machining on one machine. This high frequency vibration transfer to abrasive particle contains in abrasive slurry. d) Air, 9. c) Remains same a) 1 μm 7. Explanation: In AJM, different types of gases are used as the medium for carrying abrasives. a) 0.01 – 0.10 cm/min b) 0.04 – 0.08 mm Ultrasound in the lower frequency range of 20 kHz to 100 kHz has industrial applications for plastics processing. Answer: d 7. Answer: b In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. Masks, which are used to confine the jet stream location on work piece are made of, which type of materials? 5. View Answer. View Answer, Answer: d b) Accurate feed Ultrasonic machining, or strictly speaking the "Ultrasonic vibration machining", is a subtraction manufacturing process that removes material from the surface of a part through high frequency, low amplitude vibrations of a tool against the material surface in the presence of fine abrasive particles. b) Decreases a) True b) 2.0 to 8.0 kg /cm2 The experimental setup is shown in Fig. 9. Explanation: Typical ultrasonic speeds used are between 0.4 – 1.4 cm/min, used in producing EDM electrodes. If there is an increase in viscosity of slurry, what happens to MRR? a) Abrasive grains View Answer. View Answer. View Answer. b) Aerospace View Answer. a) Amplitude d) 25 – 40 hrs, 13. a) Mechanical d) Air 3. 9. d) Synthetic sapphire View Answer. 2. b) 1925 View Answer. c) 10 – 15 hrs Answer: d To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers. b) 10 – 150 µm b) Sinking and contouring b) Wear A CONVERTER which contains piezoelectric crystals which change the incoming high frequency electrical signal to mechanical vibration. a) Amplitude a) Die sinking a) Moisture Ultrasonic Machining can be used for which of the following processes and applications? To be continued coming soon............................. SSC-JE & RRB-JE(Mechanical) Full syllabus free video lectures:-. a) Contact Machining d) All of the mentioned a) 100 hrs View Answer. b) Work piece Answer: c Answer: d c) LBM 9. What is the frequency of mixing chamber, consisting of gas and abrasives? Explanation: In this machining, heat is the source of energy. a) 10 – 40 µm When machining porous material, which type of mechanism is introduces? 2. In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. 4. 4. In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy? c) Increase and then decrease Explanation: Any of the above liquids can be used as abrasive carrying medium. Explanation: Abrasive jet machining is used to machine, intricate shapes and holes in brittle, thin and difficult to machine materials. d) Vaporization, 2. Explanation: Abrasive jet machining can be used for deburring, cutting, cleaning and for many other heavy duty applications. In Abrasive jet machining, work piece material of removed by which of the following means? b) Alumina b) False Explanation: Material is removed using axial oscillating tool. b) 3 – 20 g/min d) All of the mentioned b) Ultrasonic machining 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, ***************************************************************. Which of the following material cannot be machined using ECM? c) 5 μm a) Water only b) <500 mm2 7. 2. Which of the following components, influence the material removal rate in Abrasive jet machining? Answer: c • Such a small vibration is amplified using the constrictor (mechanical amplifier) that holds the tool. 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. a) Large parts b) Gases In the machining system of AWJM, which one accelerates the abrasives to remove material? d) Turing, 4. Explanation: In USM, Machining rate increases as the mentioned ratio decreases and vice-versa. d) 70% water and 30% abrasives 11. a) Tool Explanation: The roundness is between 40 – 140 μm while machining graphite by Ultrasonic Machining. b) 25 L/min d) 0.40 – 1.40 cm/min, 9. What is the value of the amplitude obtained without mechanical amplifier? Explanation: Nozzle in Abrasive jet machining is made up of sapphire or WC. What are the type of materials that can be machined using Abrasive jet machining? View Answer. d) 7.0 – 10.0 µm Surface defects that may be occurred during thermal machining are ________ d) Corrosion d) None of the mentioned, 12. d) All of the mentioned. d) All of the mentioned a) Vaporization b) Low a) Side wear of tool Answer: b b) WJM The main reason why this machining process is used in the manufacturing area is because it evolves less heat in the process. a) 0.0001 – 0.001 µm Answer: b This limit varies from person to person and is approximately 20 kilohertz (20,000 hertz) in healthy young adults. d) All of the mentioned c) 5 μm No. d) 700 hrs b) False, 13. d) Three times smaller, 6. 5. b) Electron Beam Machining c) ± 0.05 mm b) Abrasive wear b) False b) Only oscillation 11. The piezoelectric vibrator which had appropriate longitudinal mode and frequency was designed and tested. b) Steel alloy d) All of the mentioned, 3. c) Increase and then decrease What is the percentage of contribution of cavitation to the total material removed? b) Two times smaller d) Decrease up to a limiting condition, 1. 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. c) Striations b) Decreases View Answer. c) Microchipping c) 18-20 kHz ECM is used to _________ the sharp edges produced after rough cuts. The concept is shown in Fig. 5.5 . c) Medium Int J Adv Manuf Technol, 103 (1–4) (2019), pp. c) Unsteady abrasive flow Of the following scientists, who discovered magnetostrictor effect? Ultrasonic Spot Welding Hand Gun for 35kHz High Power . The B 4 C, SiC, or Al 2 O 3 abrasives were mixed with water at various volume concentration. c) EBM a) Automobile d) 1980 Explanation: Using Ultrasonic Polishing, very low values of surface finish can be obtained, which may be very low as 0.3 μm. b) Decreases c) Feed pipe Explanation: Unsteady and uneven abrasive flow affects the dimensional accuracy. c) 5 hrs c) 40 – 140 μm Explanation: Abrasive jet machining can be used for micro deburring of hypodermic needles. d) 100 – 150 μm, 9. In AJM, surface roughness value will vary between which values? b) 50 – 100 µm a) 1942 b) Carrier gas 8. d) High hardening, 9. d) 30 – 35 % b) 10 times Magnetostrictive transducers are used primarily in the lower frequency ranges and are common in ultrasonic cleaners and ultrasonic machining applications. While machining W4C and glass, tool over cut size when compared to mean grain size is? The workpiece is mounted on a table and a desired static load is applied. c) 75% Amplitude of oscillation of tool in USM ranges between ________ c) Trace mechanisms a) Ultrasonic Machining Answer: b c) Partial contact machining a) 1 to 2 mm b) 3 μm The magnetostrictor is energized at the ultrasonic frequency and produces small-amplitude vibrations. The result of past work in the field of ultrasonic machining is reviewed and the effects of process parameters isolated. In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy? 5. View Answer. c) Outside temperature Answer: d d) 50 – 100 µm View Answer. Our ears pick up these vibrations, translating them into sounds. 13. d) All of the mentioned c) 30 – 56 g/min a) Copper c) Oscillation and rotation Answer: b View Answer. In AJM, air filters are used to remove which of the following? b) False View Answer. a) USM d) 70% water and 30% abrasives, 6. Explanation: More than one phase is used to combine to form hybrid machining. b) CO2 “In Abrasive jet machining, commercial grades powders can be used for machining.” d) 0.25 – 0.38 μm Explanation: Abrasive grain flow rate is between 3 – 20 g/min, in AJM. c) Average hardening a) 0.01 – 0.04 mm Explanation: In Abrasive jet machining, tolerance limit values range between ± 0.05 mm. b) False, 3. The device for converting any type of energy into ultrasonic waves is the ultrasonic transducer. b) False, 5. d) Vaporization Sound is created by waves, or vibrations in the air created by vibrating an object, which then causes the molecules surrounding it to vibrate. Answer: d a) 01 – 20 μm c) Oxygen a) 1942 c) 15 times a) Increases When compared to the conventional machining, how much times faster, is the Abrasive water jet machining? c) Increase up to a limiting condition c) 10.0 to 18.0 kg/cm2 6. c) 50 L/min a) <100 mm2 Answer: d Explanation: Relatively larger amplitudes are obtained when amplifier is used. c) Accurate feed Which of the following are the features of tool affecting MRR in USM? c) Three times greater a) Decreases 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. d) All of the mentioned, 8. Explanation: The optimal range used is between 10-40 μm. c) Concrete Answer: b Explanation: Full form of USM in advanced machining processes, is Ultrasonic machining. Magnetostriction The magnetostrictor used in USM has a high-frequency winding wound on a magnetostrictor core and a special polarizing winding around an armature. a) 0.01 – 0.50 µm d) Distance from work piece, 5. Which of the following use ECM for different applications? When was Abrasive water jet machining developed first? When the static pressure of the feed is increases, what happens to MRR? View Answer, 4. d) 1945, 1. In the following properties of abrasive grains, which of them changes rate of material removal? c) 75% 10. b) 0.001 – 0.1 µm Answer: a View Answer. d) None of the mentioned, 8. Which of the following is an example of hybrid machining? 5. Ultrasound is mechanical oscillation at a frequency of approx. c) EBM 6. b) False Automatic frequency detection -adation, amplitude regulation and automatic feed adjustment; Up to 50% reduced process forces due to ULTRASONIC allow: higher feeds, better surface finishes up to Ra < 0.1 µm and longer tool life. c) Cavitation Which of the following material/s cannot be used for making of nozzle in Abrasive jet machining? c) Ferrite In Abrasive jet machining, work piece material of removed by which of the following means? In Abrasive jet machining, intricate shapes and holes are machined on which type of materials? b) Ceramics a) Micro cracking c) Quartz Material in thermal machining is removed by which of the following means? a) Balamuth a) ± 0.01 mm On which of the following features of cavity, will the penetration depth depend on? As the tool area increases, what happens to MRR? What is the percentage of contribution of cavitation to the total material removed? What are the tolerance limit values in Abrasive water jet machining? c) Trace mechanisms 2. d) All of the mentioned d) 25.0 to 35.5 kg/cm2, 8. b) Erosion In which of the following industries, Non-traditional machining methods play an important role? Conventional ultrasonic machining (USM) uses an abrasive slurry and a vibrating tool (typically 10-15 [micro]m in amplitude and 15-30 kHZ in frequency). 9. b) Hard materials In this process abrasives contained in the slurry are driven against the work by a tool oscillating at low amplitude (25–100 microns) and high frequency (15–30 kHz). 8. In chemical machining is material removal takes by? b) SiC a) True a) Ultrasound manufacturing c) Accuracy b) Work piece View Answer. Answer: d Ultrasonic machining (USM) ... , concentrator, tool, and slurry feeding arrange. b) Static Pressure 9. Answer: a 4. d) None of the mentioned, 4. d) All of the mentioned, 11. 6. c) Machining area View Answer. Explanation: Masks can be made of any of the above-mentioned materials, 1. a) Nozzle Answer: d Explanation: Nozzle made up of WC material has a life period which range between 10 – 15 hrs. Answer: a b) 50 – 100 µm 16 kHz to 1 GHz. a) Al2O3 5. 90 ($849.90/Count) b) False 3. a) Increases d) All of the mentioned The abrasive slurry is pumped between the oscillating tool and the brittle workpiece. a) Direct injection of slurry 12. b) 15 – 20 % View Answer. d) All of the mentioned In AJM, what is the life of synthetic sapphire material nozzle? c) Chemical and electro-chemical. This paper presents an experimental and theoretical study toward the effect of UAM on chatter. b) Thin This electrical energy then used to energize the transducer which converts electric energy into mechanical vibration. It works best when the grime is on the surface of the item and needs a little more punch to remove it. d) All of the mentioned In Micro-USM, using WC tool, what is the value of diameter can be achieved? This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “USM – Machining System”. 1. 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. c) Accuracy d) No tool change required Every ultrasonic unit contains the following five elements: 1. c) Partial contact machining Advance Machining Process important Mcq questions for RGPV Online Exams 2020, https://www.youtube.com/watch?v=2k1r9mG_Sxk&list=PLelAq9xzEDXD-DOAp0fyDVoaFoRXDpk3m, Theory Questions of Chapter 3,4 & 5 Advance machining Process || RGPV online exams 2020, MCQ Questions for Advance machining process || RGPV online exam 2020, Set-1 ( Introduction Advance machining Designing ), 1. Explanation: Micro ECM is used to machine micro parts which can be from micro scale to mesoscale in size. c) Abrasive grains Frequency of tool’s oscillation in USM ranges between ________ c) Increase up to a limiting condition In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? By using Abrasive jet machining, how much amount of hardening does the materials experience? View Answer. 10. Ultrasonic Welding Powerful ultrasonic oscillations find their wide application in various fields of economy. a) Ions c) Rubber d) All of the mentioned, 2. b) False, 10. c) Medium b) Erosion d) All of the mentioned, 2. Answer: d b) Plasma c) Three times greater Explanation: Abrasive mixture consists of 70 percent water and 30 percent abrasives. a) Only rotation b) Jet engines c) Abrasive Water Jet Machining b) 0.08 – 0.13 μm Sources used in thermal machining are ________ c) Oxygen View Answer. c) 50 L/min Answer: d b) 17 L/min a) 1 – 10 µm Which of the following material/s cannot be used for making of nozzle in Abrasive jet machining? How much is the value of surface finished, achieved using Ultrasonic Polishing? View Answer. a) 0.1 to 1.0 kg/cm2 c) Remained same d) None of the mentioned, 11. d) All of the mentioned Ultrasonic slurry machining has been disclosed in U.S. Pat. d) 100 – 150 μm View Answer, 4. Answer: b At what rate slurry is pumped through nozzle in USM? c) 10 – 20 % a) 0.0001 0.001 μm b) 0.001 0.1 μm c) 1 10 μm d) 10 100 μm 15. 5. a) Glass a) 1 hr d) 68 – 85 g/min Explanation: ECM can be used for die sinking, trepanning, drilling, contouring, grinding and profiling. b) 5 – 10 % a) Water only Which of the following materials in Abrasive jet machining can be a health hazard? c) 5 hrs The 2nd generation Ultrasonic 20 linear offers high material removal rates, accurate edge machining, and reduced process forces in machining advanced materials. d) All of the mentioned, 9. A POWER SUPPLY which takes line power at 50 or 60 cycles and changes it to high ultrasonic frequency at 20,000 cycles per second or even higher. 7. A Survey on Stationary Ultrasonic Machining. b) 0.15 – 1.5 µm 6. 11. Explanation: Different sources are used to remove the materials accordingly. c) Glycerol View Answer. View Answer. c) Drilling and trepanning a) Gas turbines d) All of the mentioned What are the materials used for abrasives in Abrasive water jet machining? Technology for improving the machining medium for ________ a ) ultrasound manufacturing b ) False, 5 ultrasonic. Vibrating at a frequency of 50 Hz rate increases, what happens to the volumetric removal.... Spectrum manufacturing d ) All of the following factors affects the accuracy of parts brittleness material... Μm 15 the abrasives such as cracks and leaks and working principle an electronic oscillator used to vibrational. And stay updated with latest contests, videos, internships and jobs of 20 kHz tool d... Diameter can be from micro scale to mesoscale in size ( 2019 ), pp the View. Grains influence the MRR becomes very Difficult c, SiC, or Al 2 O abrasives... Machining are ________ a ) Electrolyte jet in micro ECM by moving the work piece c ) μm! ) 25 % b ) material c ) 28 L/min d ) of. By which of the following distribution factors, does the diameter of the following values the of. Oscillation ranges between rating of machine is built on a magnetostrictor core and a polarizing...: ultrasonic machining method are cost effective and best in results out welding... Which can be done using micro ECM is used is reviewed and the brittle workpiece commercial grades powders be... Frequency View answer ) Joule d ) All of the mentioned, 11 can build solid parts accordance the. Particles, which type of energy are ________ a ) size b ) Steve O Flawer )! Of ultrasonics in machining system of USM contains which of the mentioned View answer unit the... Jet in micro ECM by moving the work piece tips should must have wear... A Britannica Premium subscription and gain access to exclusive content on chatter Abrasive! Chemical and electro-chemical tester also is used to remove which of the mentioned, 7 heat! Vibrating frequency used for which of the mentioned, 4 in one - Hard... Combine to form hybrid machining an important role them into sounds: typical ultrasonic speeds, in graphite ranges?. Critical ultrasonic frequency oscillation into an ultrasonic tester also is used to drill holes through them wear. The following produces small indents and cavities using micro ECM is usually characterized as accuracy. Wave of frequency about 20000 to 30000 Hz and amplitude about 25-50 micron practice! Assisted electrochemical machining d ) Decrease and then Decrease d ) synthetic material. Jet manufacturing b ) 10 times faster, is the value of carrier gas c ) 28 L/min for. Violent Chemical reaction b ) Hard materials can not be used for machining size )! Mm View answer size b ) Alumina c ) Trace mechanisms d All... Nitrogen d ) None of the following process comes under mechanical machining Nitrogen d ) 39 L/min, 10 parts! Feed is increases, what happens to MRR EDM electrodes, typical ultrasonic speeds used are 0.4. 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