1. Abrasive flow value in Abrasive water jet machining will range between which of the following values?
Correct : B. 0.1 – 1.0 kg/min
2. Of the following values, between which values traverse speed will range?
Correct : B. 5 to 100 m/min
3. Depth of cut values in Abrasive water jet machining ranges between which values?
Correct : B. 2 to 250 mm
4. Who discovered USM?
Correct : A. balamuth
5. What is the full form of USM in advanced machining process?
Correct : B. ultrasonic machining
6. USM removes materials using the tool.
Correct : C. axially oscillating
7. Which is softer material in USM?
Correct : A. tool
8. Frequency of tool’s oscillation in USM ranges between
Correct : C. 18-20 khz
9. The machining system of USM contains which of the following components?
Correct : D. all of the mentioned
10. In Ultrasonic Machining, Magnetostrictor is energized at ultrasonic frequency.
Correct : A. true
11. Of the following scientists, who discovered magnetostrictor effect?
Correct : C. joule
12. In Ultrasonic Machining, magnetostrictor converts magnetic energy into which type of energy?
Correct : A. mechanical energy
13. In USM, tool tips must have low resistance and fatigue strength.
Correct : B. false
14. At what rate slurry is pumped through nozzle in USM?
Correct : B. 25 l/min
15. By which of the following means, material is removed in USM?
Correct : D. all of the mentioned
16. In the following mechanisms, which one is dominant in material removal?
Correct : A. hammering
17. When machining porous material, which type of mechanism is introduces?
Correct : B. erosion
18. The rate of material removal depends on which of the following features?
Correct : D. all of the mentioned
19. The machinability of USM depends on brittleness criterion.
Correct : A. true
20. Which of the following are the features of tool affecting MRR in USM?
Correct : D. mounting
21. What happens to MRR with increase in tool amplitude?
Correct : A. increases
22. The vibration amplitude determines, which parameter of the abrasive particles?
Correct : C. velocity
23. If splashing occurs, it will result in an increase of material removal rate in USM.
Correct : B. false
24. As the vibration frequency increases, what happens to material removal rate?
Correct : C. increase and then decrease
25. Which of the following can be used as an abrasive carrying medium?
Correct : D. all of the mentioned
26. If there is an increase in viscosity of slurry, what happens to MRR?
Correct : B. decreases
27. How much percent of the abrasives are recommended in general for abrasive medium?
Correct : D. 30 – 35 %
28. Machining rate can be affected by the ratio of hardness of tool to that of hardness of work piece.
Correct : A. true
29. As the tool area increases, what happens to MRR?
Correct : A. decreases
30. When the static pressure of the feed is increases, what happens to MRR?
Correct : C. increase up to a limiting condition
31. Which of the following distribution factors, does not affect the machining parts?
Correct : C. accurate feed
32. Which one of the following factors affects the accuracy of parts?
Correct : C. unsteady abrasive flow
33. While machining W4C and glass, tool over cut size when compared to mean grain size is?
Correct : A. two times greater
34. While machining B4C, tool over cut size when compared to mean grain size is?
Correct : C. three times greater
35. Conicity resulting after machining by Ultrasonic Machining can be reduced by?
Correct : D. all of the mentioned
36. Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining?
Correct : D. all of the mentioned
37. When the viscosity of liquid carrier is increased, the surface quality of the parts?
Correct : C. remained same
38. Ultrasonic Machining can be used for which of the following processes and applications?
Correct : D. all of the mentioned
39. Drilling in Ultrasonic Machining is done, by which motion of the tool?
Correct : C. oscillation and rotation
40. In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them?
Correct : D. all of the mentioned
41. On which of the following features of cavity, will the penetration depth depend on?
Correct : D. all of the mentioned.
42. What is the value of depth in Ultrasonic sinking, after which, material removal becomes difficult?
Correct : C. 5 to 7 mm
43. In production of EDM electrodes, typical ultrasonic speeds, in graphite ranges between?
Correct : D. 0.40 – 1.40 cm/min
44. How much is the value of surface finished, achieved using Ultrasonic Polishing?
Correct : B. 0.3 μm
45. In Micro-Ultrasonic Machining, which of the following component vibrates?
Correct : B. work piece
46. In Micro-USM, using WC tool, what is the value of diameter can be achieved?
Correct : C. 5 μm
47. In advanced machining processes, what is the full form of EDM?
Correct : A. electro discharge machining
48. Machining speeds have gone up to how many times after the invention of EDM?
Correct : B. twenty
49. After invention of EDM, surface finish have improved by how much factor?
Correct : B. 15
50. Cavities with, which of the following factors can be produced using Electro discharge machining?
Correct : C. thin walls & fine features
51. Which of the following geometries can be machined using EDM?
Correct : D. all of the mentioned
52. State whether the following statement is true or false regarding EDM. “In EDM, process is affected by hardness of material.”
Correct : B. false
53. Which of the following mechanisms is used for material removal?
Correct : A. electro discharge erosion
54. What is the value of order of frequency applied between the two electrodes in EDM?
Correct : C. 5 khz
55. What are the magnitude of voltages used in Electro discharge machining?
Correct : B. 20 to 120 v
56. How is material removed in Electro discharge machining?
Correct : A. melt and evaporate
57. What is the radius of channel, when electrical breakdown occur?
Correct : D. 10 µm
58. State whether the following statement is true or false about material removal in EDM. “In EDM, high pressures allow the metal to evaporate.”
Correct : B. false
59. What are the values of pressure of the plasma in EDM?
Correct : C. up to 200 atm
60. At the end of pulse, super-heated metal evaporates
Correct : A. explosively
61. After the explosion is over, how is the debris carried away?
Correct : B. fresh dielectric
62. The layer formed when un expelled molten metal solidifies is known as
Correct : B. recast layer
63. Amount of material removed from anode and cathode depend on which of the following?
Correct : C. electrons & positive ions
64. What happens when the electron current predominates in the discharge?
Correct : A. more anodic removal
65. What is the value of gap maintained between the electrodes when we use servo mechanism?
Correct : C. 200 – 500 µm
66. Based on the electrode gap, which of the following electric pulses are generated?
Correct : D. all of the mentioned
67. When the electrode gap is too small or electrodes are in contact, how much material is removed?
Correct : D. no material removed
68. Which components mentioned below are affected due to arcs?
Correct : C. work piece & tool
69. Which of the following pulses contribute to the desired material removal in EDM?
Correct : D. sparks
70. Which of the following are main components of EDM?
Correct : D. all of the mentioned
71. What is the function of feed-control system in Electro discharge machining?
Correct : A. constant gap
72. What is the use of power supply system in Electro discharge machining?
Correct : B. supply power
73. What is the function of dielectric circulation unit in Electro discharge machining?
Correct : C. dielectric fluid supply
74. Which of the following materials are used as electrodes in EDM?
Correct : D. all of the mentioned
75. Metals with melting point and electrical conductivity are chosen as tools in EDM.
Correct : C. high, good
76. Copper has Electro discharge machining wear and conductivity.
Correct : A. good, better
77. Which of the following tungsten carbides are used as electrodes in EDM?
Correct : C. all of the mentioned
78. Brass metal ensures which type of sparking conditions in Electro discharge machining?
Correct : A. stable
79. In addition to the feed of tool, Electro discharge machining tool can have which type of motion?
Correct : B. rotary
80. Which of the following parameters determines the size of cavities?
Correct : C. all of the mentioned
81. Electrode orbiting the flushing of dielectric fluid in Electro discharge machining.
Correct : A. improves
82. Quality of hole produced by orbiting motion is to that obtained by using stationary electrode.
Correct : B. superior
83. In EDM, electrode polarity depends up on which of the following components?
Correct : C. all of the mentioned
84. Which one among the following, is the most important factor in determining the tool wear?
Correct : A. melting point
85. Electrode wear ratios can be expressed as, which of the following wears?
Correct : D. all of the mentioned
86. Which of the following are the other factors that influence the electrode wear?
Correct : D. all of the mentioned
87. State whether the following statement is true or false regarding wear in EDM. “In EDM, electrode wear is less dominant when it comes to micromachining applications.”
Correct : B. false
88. State whether the following statement is true or false regarding wear in EDM. “In EDM, corner wear ratio does not depend on type of electrode material.”
Correct : B. false
89. In Electro discharge machining, highest wear ratio is associated with which type of melting point?
Correct : A. low
90. Which of the following is not a function of dielectric in EDM?
Correct : C. maintain voltage
91. Which of the following are the main requirements of dielectric fluids?
Correct : D. all of the mentioned
92. Which of the following can be used as dielectric fluids in EDM?
Correct : D. all of the mentioned
93. In EDM, inadequate flushing will not result in which of the following consequences?
Correct : B. debris removal
94. Which methods below, are used for introducing the dielectric in machining gap?
Correct : D. all of the mentioned
95. Few large holes are than many small flushing holes in Electro discharge machining.
Correct : A. worse
96. State whether the following statement is true or false regarding the dielectric in EDM. “In EDM, flushing through the tool is more preferred than side flushing.”
Correct : A. true
97. In Electro discharge machining, which type of dielectric flow mentioned below is desirable?
Correct : B. steady flow
98. Metal is removed on which of the components in electro discharge machining?
Correct : C. electrode tool & work piece
99. On which of the following components, does the MRR depend?
Correct : C. electrode tool & work piece
100. Which of the following factors influence the material removal rate?