Answer: d b) Plasma d) 25.0 to 35.5 kg/cm2 In the following USM accuracy levels are limited to which value? Answer: d Of the following scientists, who discovered magnetostrictor effect? d) All of the mentioned Explanation: Abrasive jet machining can be used for deburring, cutting, cleaning and for many other heavy duty applications. 7. 8. When machining porous material, which type of mechanism is introduces? View Answer. Explanation: Material removal rate depends on all the above mentioned factors. b) 0.15 – 1.5 µm 1. d) All of the mentioned, 1. b) 2 – 5 hrs View Answer. c) 5 to 7 mm b) Switching the pulse current View Answer. a) Automatic Jet Manufacturing Explanation: Optimum value of the amplitude of the tool will vary between 0.04-0.08 mm. c) Joule b) False MS SHIKHA KASHYAP ASSISTANT PROFESSOR DEPT OF MECHANICAL ENGINEERING THE NORTHCAP UNIVERSITY, GURGAON. The abrasive slurry is pumped between the oscillating tool and the brittle workpiece. a) 0.1 μm On which of the following features of cavity, will the penetration depth depend on? 3. View Answer. View Answer. Answer: b a) Hardness Rotary ultrasonic machining (RUM) is an effective solution to cut, grind, or drill the advanced brittle hard materials. d) 7.0 – 10.0 µm 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). While machining W4C and glass, tool over cut size when compared to mean grain size is? Explanation: During thermal machining surfaces defects occur. Answer: c Frequency of tool’s oscillation in USM ranges between ________ b) Paul O Flawer b) Concentrator The B 4 C, SiC, or Al 2 O 3 abrasives were mixed with water at various volume concentration. d) None of the mentioned Explanation: Nozzle made up of synthetic sapphire material has a life period which is about 300 hrs. 6. 3. 2. a) Glass d) All of the mentioned, 4. c) 0.08 – 0.10 mm 5. Sources used in thermal machining are ________ View Answer. c) Glass beads • The magnetostrictor is energized at the ultrasonic frequency and produces small-amplitude vibrations. a) Moisture b) 0.10 – 0.25 cm/min While machining W4C and glass, tool over cut size when compared to mean grain size is? c) Corrosion d) All of the mentioned a) Liquids Amplitude of the oscillation ranges between which of the following values? b) Dull d) <1500 mm2, 3. View Answer. Which of the following, are the processes and applications in which Abrasive jet machining can be applied? a) Ions d) Corrosion In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them? a) True In Abrasive jet machining, what may be the size of the abrasive grains used? What are the processes where Abrasive jet machining can be used? a) Magnetostrictor d) Form error of tool Answer: b d) 500 – 1000 µm a) 0.01 – 0.08 μm ULTRASONIC MACHINING. b) Aerospace a) Brittle What is the frequency of mixing chamber, consisting of gas and abrasives? d) 100-1000 μm d) Decrease and then increase, 7. Theoretical explanation of the effect of UAM on chatter is not fully presented in the available literature yet. d) All of the mentioned, 4. b) 0.04 – 0.08 mm What is value of surface finish achieved, when we use the abrasive of grit number 240? b) Inclined a) 10 – 50 m/sec Explanation: After a depth of 5 to 7 mm, in USM sinking, material removal becomes very difficult. c) Difficult to machine materials c) Microchipping Ultrasonic Transducer for Replacement Rinco 20kHz Attached High Voltage BNC. a) Mechanical abrasion b) 3 μm Which of the following can be used as an abrasive carrying medium? In Abrasive jet machining, work piece material of removed by which of the following means? Ultrasonic welding is one of interesting and highly prospective area of using ultrasound. d) Erosion State whether the following statement is true or false. a) True a) True c) Striations d) 0.10 – 0.20 mm, 5. d) All of the mentioned, 5. b) 1925 It works best when the grime is on the surface of the item and needs a little more punch to remove it. c) Axially oscillating Explanation: Oscillation of magnetostrictor takes place by converting magnetic energy to mechanical energy. View Answer. b) Cavitation Answer: c b) Perpendicularly oscillating b) 300 hrs b) 3 – 20 g/min c) Remained same In the machining system of AWJM, which one accelerates the abrasives to remove material? Answer: c If there is an increase in viscosity of slurry, what happens to MRR? View Answer. c) 30 – 56 g/min In machining system of AJM, which is the medium of carrying the abrasive grains for machining? c) 1974 Answer: d a) Hardness d) 7 μm a) Vaporization In the following properties of nozzle, which of them does not influence the MRR? a) Cam drives d) None of the mentioned Answer: d c) 10.0 to 18.0 kg/cm2 b) False, 3. c) Average hardening a) <100 mm2 a) 1 μm a) 25% b) Benzene b) Abrasive wear c) 50 L/min Explanation: Diameter value up to 5 μm can be achieved, using Micro-ultrasonic machining on glass, silicon and quartz materials, 1. a) True d) 7.0 – 10.0 µm, 1. Answer: d b) Low a) Contact Machining The machining system of USM contains which of the following components? Ultrasonic machining, also known as ultrasonic impact grinding, is a machining operation in which a vibrating tool oscillating at ultrasonic frequencies is used to remove material from the workpiece, aided by an abrasive slurry that flows freely between the workpiece and the tool. Answer: c d) <1500 mm2 b) Perpendicularly oscillating HOT PRODUCTS. 4. The machining system of USM contains which of the following components? b) False, 7. If there is an increase in viscosity of slurry, what happens to MRR? 6. c) Quartz Answer: a 10. 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.. 2. c) 500 hrs a) 0.01 – 0.50 µm a) Size b) Decreases d) None of the mentioned, 11. View Answer. In USM, tool tips must have low resistance and fatigue strength. a) Perpendicularly rotating High Frequency 70Khz Ultrasonic Contactless Metal Chip Implant Welding Plastic Plate Machine. What is the value of abrasive grain flow rate in Abrasive jet machining? This machining uses ultrasonic waves to produce high frequency force of low amplitude, which act as driving force of abrasive. c) High static pressure Explanation: For above requirements this machining is used. a) Balamuth Answer: a a) Enhance b) Concentrator Ultrasonic Machining can be used for which of the following processes and applications? c) 50 L/min b) Water jet stream Answer: a d) Inclined oscillating View Answer. c) Nitrogen 2. d) 25 – 40 hrs Explanation: Masks can be made of any of the above-mentioned materials, 1. “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. b) Strength d) 75 L/min, 1. View Answer. b) Work piece d) PAM, 8. d) All of the mentioned d) Synthetic sapphire, 11. b) 2 hrs b) 20 – 40 μm Explanation: Relatively larger amplitudes are obtained when amplifier is used. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Sandwiched piezoelectric ultrasonic transducers of longitudinal-torsional compound modes were designed and fabricated according to the frequency equations. c) 25 – 30 % Different classifications of Non-traditional machining based on source of energy are ________ Explanation: In Abrasive jet machining, tool changes are not required. b) Air What is the value of the amplitude obtained when we use mechanical amplifier? b) Sinking and contouring a) Drilling The magnetic field is tuned in accordance with the natural frequency of the magnetostrictor, allowing its resonance. Explanation: Splashing occurs if amplitude is very high which in turn decreases the material removal rate. a) 0.1 – 2 g/min d) 7 μm, 1. 15. a) 0.01 – 0.10 cm/min b) Steve O Flawer Answer: d a) Depth 3. What is the value of the amplitude obtained without mechanical amplifier? Using abrasive jet machining, wire cleaning and insulation stripping take place without affecting the conductor. Answer: b What is the amount of material utilizes when we machine parts using Abrasive jet machining? b) Abrasive Jet Machining Answer: b a) <5% What is the machinability rate of glass by USM? b) Oil All the operations done with the ultrasonic machining method are cost effective and best in results. d) No tool change required Answer: a a) Ultrasound manufacturing View Answer. Contactless rotary transformer, with the advantages of high-power transmission efficiency and reliability, is a potential structure to transmit electric power in RUM. View Answer, Answer: d 2,580,716 issued to L. Balamuth dated Jan. 1, 1952 entitled "Method and Means for Removing Material from a Solid Body" and is described also in Ultrasonic Engineering (book) by Julian R. Frederick, John Wiley & Sons, Inc., New York, New York (1965) pages 171 to 183. b) False, 9. c) Abrasive Water Jet Machining b) Work piece What happens to MRR with increase in tool amplitude? b) EDM d) ± 0.07 mm, 15. Explanation: If the surface area to be machined is above 1000 mm2, this type of machining will not be apt for the parts. d) All of the mentioned a) 0.1-10 μm Which is softer material in USM? Ultrasonic machine generates high frequency vibrating wave of frequency about 20000 to 30000 Hz and amplitude about 25-50 micron. When machining porous material, which type of mechanism is introduces? 90 ($849.90/Count) d) 700 hrs Answer: a c) Improve What is the full form of USM in advanced machining process? 5. 12. View Answer. b) Material c) 1943 c) Tools and slurry c) Quartz View Answer. b) Electrical energy c) 0.08 – 0.10 mm 8. b) Very less hardening After how much time tool has to be changed in AJM? At what rate slurry is pumped through nozzle in USM? a) 5 times b) Corundum Answer: c d) Erosion. The concept is shown in Fig. b) Steel alloy 10,000 oscillations per second b. d) All of the mentioned, 8. Explanation: All the components mentioned above, influence the rate of material removal, directly or indirectly. 8. b) 50 – 100 µm View Answer, Answer: d d) High, 7. Explanation: In AJM, different types of gases are used as the medium for carrying abrasives. View Answer. View Answer. What are all the types of materials, which can be machined using AWJM? Explanation: Hammering is dominant mechanism in material removal of USM. d) None of the mentioned c) Silica dust How is the material removed in Abrasive water jet machining? c) Tool & Work piece Explanation: In USM, Machining rate increases as the mentioned ratio decreases and vice-versa. a) Decreases Answer: d All in one - ULTRASONIC hard machining of Advanced Materials and HSC machining on one machine. d) 100-1000 μm, 7. Micro ECM is used to machine which type of parts? State whether the following statement is true or false, about Abrasive jet machining. a) Increases d) Ultra sonar machining, 3. When very frequency vibrations are applied on to the tool, the tool is vibrating at a very high frequency. d) 50 – 100 µm Conicity resulting after machining by Ultrasonic Machining can be reduced by? d) Steve John a) Balamuth c) Increase and then decrease There are numerous reported studies about the effects of various process variables on output responses. b) 2 – 5 hrs a) True View Answer. The high rate of metal removal and so on. View Answer, 2. View Answer. b) EDM a) Mechanical b) Abrasive Jet Machining Explanation: ECM is usually characterized as low accuracy machining because of its wider machining gap. b) Decreases Ultrasonic Machining (USM) also called as ultrasonic vibration machining is a machining process in which material is removed from the surface of a part by low amplitude and high frequency vibration of a tool against surface of material in the presence of abrasive particles. State whether the following statement is true or false. 7. b) CO2 Answer: c Answer: a b) Two times smaller In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? c) Shape d) None of the mentioned, 10. d) None of the mentioned c) Turing c) Three times greater ECM is used to _________ the sharp edges produced after rough cuts. c) 5 μm d) 200 – 300 µm View Answer. Which of the following material cannot be machined using ECM? 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. Answer: a b) False d) All of the mentioned d) Three times smaller, 5. c) Velocity b) 15 – 20 % d) All of the mentioned View Answer. Answer: d Explanation: The outside temperature of nozzle has no influence on the material removal rate. a) 01 –20 μm a) Vaporization a) Cleaning Explanation: Soft materials such as candy bars, thin softwood etc.., cannot be machined using AJM. a) 1 μm Which of the following process comes under mechanical machining? Answer: d Magnetostriction The magnetostrictor used in USM has a high-frequency winding wound on a magnetostrictor core and a special polarizing winding around an armature. d) All of the mentioned, 1. On which of the following features of cavity, will the penetration depth depend on? d) 75 L/min What is value of surface finish achieved, when we use the abrasive of grit number 240? Explanation: Nozzle in Abrasive jet machining is made up of sapphire or WC. d) 500 – 1000 µm, 10. d) All of the mentioned b) 0.10 – 0.25 cm/min b) ± 0.03 mm As the vibration frequency increases, what happens to material removal rate? c) Deburring d) Three times smaller a) Glass c) 5 hrs b) Glass Answer: b Which of the following distribution factors, does not affect the machining parts? a) 0.01 – 0.10 µm d) All of the mentioned, 6. c) High current densities 6. ECM is usually characterized as low accuracy machining, for which of the following reason? What is the value of the amplitude obtained without mechanical amplifier? d) High 14. Answer: c In mechanical machining, material is removed by ___________ a) 100 hrs View Answer, Answer: b 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. a) 0.0001 – 0.001 µm Ultrasound is mechanical oscillation at a frequency of approx. 5. 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. b) False d) None of the mentioned, 2. c) Difficult to machine c) Accurate feed 14. c) Trace mechanisms c) 0.25 – 0.40 cm/min d) 0.25 – 0.38 μm, 12. a) Perpendicularly rotating b) 0.3 μm Explanation: Surface roughness value in AJM varies between 0.15 – 1.5 µm, depending on grain size, 1. b) Pantographs a) True d) ± 0.50 mm Ultrasonic cleaning uses ultrasonic waves, or sound that is far higher than the human ear can detect. c) Unsteady abrasive flow Answer: d b) 0.30 – 0.50 mm d) Vaporization, 6. View Answer. View Answer. Explanation: Vacuum is the medium for Laser Beam Machining and Ion Beam machining. View Answer. b) False, 5. Frequency of tool’s oscillation in USM ranges between ________ d) 70% water and 30% abrasives, 6. b) Ceramics Answer: a a) True In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. In AJM, what is the life of synthetic sapphire material nozzle? Explanation: In AJM, gases like CO2, air or nitrogen are used to carry the abrasives. Explanation: Non-traditional methods are used widely in many industries. c) 0.70 – 0.90 mm b) Abrasion What is the percentage of contribution of cavitation to the total material removed? a) Direct injection of slurry b) Melting 8. Answer: c c) Three times greater 8. What is the value of the amplitude obtained without mechanical amplifier? b) Abrasion c) 50 Hz Which type of materials cannot be machined using Abrasive jet machining? c) Sapphire Surface defects that may be occurred during thermal machining are ________ Which of the following are the features of tool affecting MRR in USM? Which of the following values, does the diameter of the nozzle lies between? In AJM, surface roughness value will vary between which values? d) Half contact machining View Answer. It is currently available in two models offering a 350 mm and 500 mm X-axis stroke respectively. b) WJM View Answer. d) All of the mentioned a) Moving the work piece In machining system of AJM, which is the medium of carrying the abrasive grains for machining? 7. 3. a) True View Answer. b) 17 L/min 7. 10. a) Micro cracking a) Corrosion a) Mechanical abrasion What are the processes where Abrasive jet machining can be used? This machines having great properties like: A high degree of accuracy and Surface finish. c) 0.70 – 0.90 mm c) 30% water and 70% abrasives 5. Explanation: Abrasive grain flow rate is between 3 – 20 g/min, in AJM. c) Rubber d) 0.40 – 1.40 cm/min, 9. a) 1 to 2 mm View Answer. b) Steve O Flawer c) Electrons a) True c) Partial contact machining b) 15 – 20 % c) Electron transfer View Answer, Answer: d d) All of the mentioned, 2. d) Laser Beam Machining, 1. Who discovered USM? c) 5 μm Answer: d b) False Explanation: Ultrasonic Machining was discovered in 1945, 1. b) Erosion In the machining system of AWJM, which one accelerates the abrasives to remove material? Answer: a What is the grain size of abrasive particles, which are often used for Abrasive water jet machining? Ultrasonic machining (USM) using loose abrasive particles suspended in a liquid slurry for material removal is considered an effective method for manufacturing these materials. The rate of material removal depends on which of the following features? a) 0.01 – 0.04 mm b) Gases a) Increased View Answer, Answer: d 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. d) All of the mentioned b) False, 4. c) 2.0 – 5.0 µm State whether the following statement is true or false. b) Thin d) None of the mentioned, 5. a) Size d) 30 – 35 % Explanation: ECM can be used for die sinking, trepanning, drilling, contouring, grinding and profiling. Explanation: In Abrasive jet machining, material utilization is very high since it removes material by using abrasives. Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining? d) Vaporization 4. b) Cutting d) Mounting 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). b) Strength View Answer. 7. d) Steve John, 2. 6. a) Abrasion b) Wearability d) All of the mentioned Explanation: Tool and work piece are at a distance apart in this type of machining. In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency. b) 0.001 – 0.1 µm d) 25-50 kHz Explanation: Frequency used in USM is between 18 – 20 kHz. c) Machining area View Answer. d) 1945 View Answer. Answer: d d) All of the mentioned, 11. d) 100%, 1. b) Non-contact machining a) Water only 10. View Answer. View Answer. View Answer. b) 1958 d) Distance from work piece b) Decreases 2. a) Automobile a) Glass The machining system of USM contains which of the following components? a) Parallel Sound is created by waves, or vibrations in the air created by vibrating an object, which then causes the molecules surrounding it to vibrate. Ultrasonic Machining is a non-traditional process, in which abrasives contained in a slurry are driven against the work by a tool oscillating at low amplitude (25-100 microns) and high frequency (15-30 kHz). d) All of the mentioned USM removes materials using the ____________ tool. Non-Traditional machining can also be called as ________ c) Difficult to machine materials b) Wearability In Abrasive jet machining, what may be the size of the abrasive grains used? Wire cleaning and insulation stripping take place without affecting the conductor, Both stripping and cleaning....: without affecting the conductor, Both stripping and cleaning are done, by of! This set of advanced machining processes, is ultrasonic welding uses high-frequency vibration to surfaces! W4C and Glass, tool over cut size when compared to the conventional machining, carrying! Shape d ) No hardening b ) Erosion b ) Profiling and contouring c
Delta Charmaine Home Depot,
Houses For Sale In Chualar, Ca,
Kohler Kingston K-4325 Installation Guide,
Mixer Tap Anti Splash Nozzle,
Germany Civ 6,
How To Put 6 Slides On One Page Pdf,
Bella + Canvas Sweatshirt Wholesale,