McqMate
1. |
Non-Traditional machining is recommended when we need which of the following features? |
A. | complex shapes |
B. | high surface quality |
C. | low-rigidity structures |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: for above requirements this machining is used. |
2. |
Non-Traditional machining can also be called as |
A. | contact machining |
B. | non-contact machining |
C. | partial contact machining |
D. | half contact machining |
Answer» B. non-contact machining | |
Explanation: tool and work piece are at a distance apart in this type of machining. |
3. |
In which of the following industries, Non-traditional machining methods play an important role? |
A. | automobile |
B. | aerospace |
C. | medical |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: non-traditional methods are used widely in many industries. |
4. |
Different classifications of Non-traditional machining based on source of energy are |
A. | mechanical |
B. | thermal |
C. | chemical and electro-chemical. |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: it can be classified into the above mentioned categories. |
5. |
In mechanical machining, material is removed by |
A. | erosion |
B. | corrosion |
C. | abrasion |
D. | vaporization |
Answer» A. erosion | |
Explanation: abrasive grains remove material by mechanical erosion in usm. |
6. |
Material in thermal machining is removed by which of the following means? |
A. | vaporization |
B. | melting |
C. | electro-plating |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: in this machining, heat is the source of energy. |
7. |
Which of the following process comes under mechanical machining? |
A. | usm |
B. | edm |
C. | lbm |
D. | pam |
Answer» A. usm | |
Explanation: usm removes material by mechanical erosion. |
8. |
Surface defects that may be occurred during thermal machining are |
A. | micro cracking |
B. | heat affected zones |
C. | striations |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: during thermal machining surfaces defects occur. |
9. |
Sources used in thermal machining are |
A. | ions |
B. | plasma |
C. | electrons |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: different sources are used to remove the materials accordingly. |
10. |
Vacuum is the machining medium for |
A. | lbm |
B. | wjm |
C. | ebm |
D. | none of the mentioned |
Answer» A. lbm | |
Explanation: vacuum is the medium for laser beam machining and ion beam machining. |
11. |
In chemical machining is material removal takes by? |
A. | chemical reaction |
B. | erosion |
C. | electron removal |
D. | none of the mentioned |
Answer» A. chemical reaction | |
Explanation: chemical machining removes material by chemical reactions. |
12. |
Which of the following is an example of hybrid machining? |
A. | ultrasonic machining |
B. | electron beam machining |
C. | ultrasonic assisted electrochemical machining |
D. | laser beam machining |
Answer» C. ultrasonic assisted electrochemical machining | |
Explanation: more than one phase is used to combine to form hybrid machining. |
13. |
What is the full form of WJM in advanced machining processes? |
A. | water jack manufacturing |
B. | water jet machining |
C. | water jet manufacturing |
D. | water jack manufacturing |
Answer» B. water jet machining | |
Explanation: the full form of wjm is water jet machining in advanced machining processes. |
14. |
What is the key element of water jet machining for material removal? |
A. | tool holder |
B. | work piece |
C. | water jet |
D. | power source |
Answer» C. water jet | |
Explanation: water jet is the one, which is used to cut the work piece and to remove material. |
15. |
What is the velocity of water jet stream in water jet machining? |
A. | 100 m/sec |
B. | 300 m/sec |
C. | 700 m/sec |
D. | 900 m/sec |
Answer» D. 900 m/sec | |
Explanation: velocity of water jet stream that is used in water jet machining is about 900 m/sec. |
16. |
Which of the following is not a part of machining system of Water jet machining? |
A. | transducer |
B. | accumulator |
C. | jet cutting nozzle |
D. | hydraulic pump |
Answer» A. transducer | |
Explanation: transducer is not a part of water jet machining and other components come under wjm |
17. |
What is the general power rating of the hydraulic pump, used in WJM? |
A. | 10 kw |
B. | 20 kw |
C. | 30 kw |
D. | 40 kw |
Answer» C. 30 kw | |
Explanation: the power rating of the motor of hydraulic pump, which is used in wjm is about 30 kw. |
18. |
Which of the following are the components of intensifier present in water jet machining system? |
A. | piston |
B. | plunger |
C. | limit switch |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: the above mentioned components are present in the intensifier of water jet machining. |
19. |
On which property of water, will the accumulator in Water jet machining rely on? |
A. | density |
B. | compressibility |
C. | viscosity |
D. | velocity |
Answer» B. compressibility | |
Explanation: accumulator relies on compressibility of water (12% at 3800bar), in order to maintain a uniform discharge pressure in wjm. |
20. |
What are the values of typical tube diameters in the machining system in WJM? |
A. | 0.1 to 1 mm |
B. | 1 to 6 mm |
C. | 6 to 14 mm |
D. | 14 to 25 mm |
Answer» C. 6 to 14 mm | |
Explanation: typical tube diameter values range between 6 to 14 mm. |
21. |
What is the expected life of the nozzles used in WJM? |
A. | 10 hrs |
B. | 20 hrs |
C. | 100 hrs |
D. | 200 hrs |
Answer» D. 200 hrs | |
Explanation: the life that is expected from the nozzle, which is a part of machining system, is 200 hrs. |
22. |
Which of the following does not damage the nozzle used in Water jet machining? |
A. | particles of dirt |
B. | mineral deposits |
C. | water |
D. | all of the mentioned |
Answer» C. water | |
Explanation: only dirt particles and mineral deposits are responsible for damage of nozzle. |
23. |
What are the uses of catcher in machining system of Water jet machining? |
A. | collecting dirt |
B. | collection of debris |
C. | reduce noise levels |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: catcher in wjm is used to collect the dirt, machined debris and reduce the noise levels. |
24. |
Distance between which components, is the stand-off distance? |
A. | nozzle-inlet and work piece top |
B. | nozzle-outlet and work piece-top |
C. | nozzle-inlet and work piece-bottom |
D. | nozzle-outlet and work piece-bottom |
Answer» B. nozzle-outlet and work piece-top | |
Explanation: stand-off distance is the distance between top of work piece and nozzle outlet. |
25. |
10 – 0.30 mm. |
A. | 0.1 – 1 mm |
B. | 1 – 2 mm |
C. | 2 – 6 mm |
D. | 6 – 14 mm |
Answer» C. 2 – 6 mm | |
Explanation: stand-off distance value ranges between 2.5 – 6 mm in water jet machining. |
26. |
8 – 25 mm. |
A. | 0.0001 – 0.025 m/min |
B. | 0.05 – 0.25 m/min |
C. | 0.5 – 200 m/min |
D. | 200 – 500 m/min |
Answer» C. 0.5 – 200 m/min | |
Explanation: in water jet machining, value of the feed rate ranges between 0.5 – 200 m/min. |
27. |
In WJM, what are the properties of jet fluid that affect the MRR? |
A. | velocity |
B. | flow rate |
C. | viscosity |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: all the mentioned properties above, of jet fluid affect the mrr in water jet machining. |
28. |
Which of the following property/ies of nozzle does not affect the material removal rate in Water jet machining? |
A. | material |
B. | diameter |
C. | outside temperature |
D. | stand-off distance |
Answer» C. outside temperature | |
Explanation: in the nozzle, outside temperature has no effect on the rate of material removal. |
29. |
In the following materials, Water jet machining can be used on which type of material? |
A. | metals |
B. | plastics |
C. | ceramics |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: wjm can be used on metals, cloth, paper, plastics, food, leather, and ceramics. |
30. |
What are the processes and applications, where Water jet machining can be used? |
A. | cutting |
B. | drilling |
C. | deburring |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: water jet machining can be used for drilling, cutting, deburring, surface treatment and many more applications. |
31. |
What is the tolerance limit range of thin materials in WJM? |
A. | ± 0.1 mm |
B. | ± 10 mm |
C. | ± 25 mm |
D. | ± 50 mm |
Answer» C. ± 25 mm | |
Explanation: in water jet machining, the range of tolerance is ± 25 mm. |
32. |
In cutting of rocks using water jet machining, which type of pressure is needed? |
A. | low pressure |
B. | medium pressure |
C. | high pressure |
D. | none of the mentioned |
Answer» C. high pressure | |
Explanation: in wjm, very high pressures and velocities are needed while cutting rocks. |
33. |
In deburring, which combination removes the material from non-metallic materials? |
A. | high pressure and low flow rate |
B. | high pressure and high flow rate |
C. | low pressure and low flow rate |
D. | low pressure and high flow rate |
Answer» A. high pressure and low flow rate | |
Explanation: for non-metallic materials high pressure and lower flow rates are used in deburring. |
34. |
Which of the following materials has some drawbacks of cutting WJM? |
A. | food |
B. | rocks |
C. | fibre-reinforced plastics |
D. | none of the mentioned |
Answer» C. fibre-reinforced plastics | |
Explanation: water gets deflected due to the fibre embedded in the matrix of fibre- reinforced plastics when we use wjm. |
35. |
In WJM, surface treatment includes which type of processes? |
A. | removing deposits |
B. | removing chemicals |
C. | degreasing |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: surface treatment is done using wjm to clean the surface from many toxic chemical, deposits, residues etc |
36. |
In how many directions, can the cutting takes place in Water jet machining? |
A. | uni-directional |
B. | bi-directional |
C. | multi-directional |
D. | none of the mentioned |
Answer» C. multi-directional | |
Explanation: water jet machining has multi directional cutting capacity i.e.., in any direction in three dimensional space. |
37. |
In Water jet machining, cuts can be started at which place of workpiece? |
A. | from left |
B. | from right |
C. | from middle |
D. | from any point |
Answer» D. from any point | |
Explanation: in wjm, cuts can be started from any point on the workpiece. |
38. |
Which of the following is not an advantage of Water jet machining? |
A. | burr produced is minimal |
B. | no heat is produced |
C. | relatively low hourly rates |
D. | environmentally safe |
Answer» C. relatively low hourly rates | |
Explanation: costs per hour are relatively high in water jet machining. |
39. |
In Water jet machining, tool need not require sharpening once the machining is done. |
A. | true |
B. | false |
Answer» A. true | |
Explanation: tool does not wear in water jet machining, so it need not be sharpened. |
40. |
Which of the following secondary processes are eliminated in Water jet machining? |
A. | grinding of surface |
B. | surface treatment |
C. | polishing of surface |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: all the mentioned secondary processes above, are eliminated in water jet machining. |
41. |
How many parts are cut using Water jet machining, on a single blank? |
A. | one part |
B. | two parts |
C. | three parts |
D. | multiple parts |
Answer» D. multiple parts | |
Explanation: depending up on the kerf width, multiple parts can be machined using a single blank. |
42. |
Which of the following is the disadvantage of water jet machining? |
A. | narrow kerf width |
B. | small diameter of nozzle |
C. | not suitable for mass production |
D. | burr is minimal |
Answer» C. not suitable for mass production | |
Explanation: due to high maintenance, wjm cannot be used for mass production. |
43. |
. In advanced machining processes, what is the full form of AJM? |
A. | automatic jet manufacturing |
B. | abrasive jet machining |
C. | automated jet machining |
D. | abrasive jet manufacturing |
Answer» B. abrasive jet machining | |
Explanation: in advanced machining processes, full form of ajm is abrasive jet machining. |
44. |
In AJM, which of the following materials are used as abrasive grains? |
A. | al2o3 |
B. | sic |
C. | glass beads |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: in abrasive jet machining, any of the particles mentioned above can be used as abrasive grains. |
45. |
In Abrasive jet machining, work piece material of removed by which of the following means? |
A. | vaporization |
B. | electro plating |
C. | mechanical abrasion |
D. | corrosion |
Answer» C. mechanical abrasion | |
Explanation: abrasive particles hit the surface with high pressure and high velocities, which removes the material. |
46. |
Which type of materials can be machined using Abrasive jet machining? |
A. | glass |
B. | ceramics |
C. | hard materials |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: materials like ceramics, glass, hard and super hard materials can be machined using abrasive jet machining. |
47. |
In machining system of AJM, which is the medium of carrying the abrasive grains for machining? |
A. | liquids |
B. | gases |
C. | any fluids |
D. | none of the mentioned |
Answer» B. gases | |
Explanation: in ajm, different types of gases are used as the medium for carrying abrasives. |
48. |
In machining system of AJM, what is/are the gas/es used for carrying the abrasives? |
A. | co2 |
B. | air |
C. | nitrogen |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: in ajm, gases like co2, air or nitrogen are used to carry the abrasives. |
49. |
What is the pressure of gas that is to be supplied, for carrying the abrasives? |
A. | 0.1 to 1.0 kg/cm2 |
B. | 2.0 to 8.0 kg /cm2 |
C. | 10.0 to 18.0 kg/cm2 |
D. | 25.0 to 35.5 kg/cm2 |
Answer» B. 2.0 to 8.0 kg /cm2 | |
Explanation: the pressure of the carrying gas should range between 2 to 8 kg/cm2. |
50. |
Which of the following gas, should never be used as the carrier of abrasives? |
A. | nitrogen |
B. | co2 |
C. | oxygen |
D. | air |
Answer» C. oxygen | |
Explanation: oxygen should not be used as carrier because it causes a violent chemical reaction with abrasives or work piece. |
51. |
What is the frequency of mixing chamber, consisting of gas and abrasives? |
A. | 10 hz |
B. | 30 hz |
C. | 50 hz |
D. | 70 hz |
Answer» C. 50 hz | |
Explanation: mixing chamber consisting of carrier gas and the abrasive grains, vibrates at a frequency of 50 hz. |
52. |
What are the processes where Abrasive jet machining can be used? |
A. | cleaning |
B. | cutting |
C. | deburring |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: abrasive jet machining can be used for deburring, cutting, cleaning and for many other heavy duty applications. |
53. |
In machining system of AJM, which of the following controls the relative motion between work piece and nozzle? |
A. | cam drives |
B. | pantographs |
C. | trace mechanisms |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: relative motion in abrasive jet machining can be controlled by the above mentioned means. |
54. |
Masks, which are used to confine the jet stream location on work piece are made of, which type of materials? |
A. | copper |
B. | glass |
C. | rubber |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: masks can be made of any of the above-mentioned materials. |
55. |
In AJM, what is the mechanism of removal of material from the work piece? |
A. | corrosion |
B. | abrasion |
C. | electron transfer |
D. | vaporization |
Answer» B. abrasion | |
Explanation: in abrasive jet machining, the removal of material takes places by mechanical abrasion, using abrasive grains. |
56. |
In AJM, abrasive jet from the nozzle follows, which type of path for a short distance? |
A. | parallel |
B. | inclined |
C. | perpendicular |
D. | none of the mentioned |
Answer» A. parallel | |
Explanation: abrasive particles follow a parallel path for short distance and then flare outward. |
57. |
Which of the following components, influence the material removal rate in Abrasive jet machining? |
A. | nozzle |
B. | carrier gas |
C. | abrasive grains |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: all the components mentioned above, influence the rate of material removal, directly or indirectly. |
58. |
In the following properties of nozzle, which of them does not influence the MRR? |
A. | size |
B. | wear |
C. | outside temperature |
D. | distance from work piece |
Answer» C. outside temperature | |
Explanation: the outside temperature of nozzle has no influence on the material removal rate. |
59. |
In the following properties of abrasive grains, which of them changes rate of material removal? |
A. | size |
B. | strength |
C. | shape |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: the above mentioned properties of abrasive grains influence the material removal rate. |
60. |
As the abrasive flow rate increases, what happens to the volumetric removal rate? |
A. | increases |
B. | decreases |
C. | increase and then decrease |
D. | decrease and then increase |
Answer» C. increase and then decrease | |
Explanation: in ajm, volumetric removal rate increases up to a level and then decreases. |
61. |
What is the value of abrasive grain flow rate in Abrasive jet machining? |
A. | 0.1 – 2 g/min |
B. | 3 – 20 g/min |
C. | 30 – 56 g/min |
D. | 68 – 85 g/min |
Answer» B. 3 – 20 g/min | |
Explanation: abrasive grain flow rate is between 3 – 20 g/min, in ajm. |
62. |
What is the value of carrier gas flow rate in Abrasive jet machining? |
A. | 6 l/min |
B. | 17 l/min |
C. | 28 l/min |
D. | 39 l/min |
Answer» C. 28 l/min | |
Explanation: in abrasive jet machining, the flow rate of abrasive carrier gas is around 28 l/min. |
63. |
Which of the following material/s cannot be used for making of nozzle in Abrasive jet machining? |
A. | tungsten carbide |
B. | steel alloy |
C. | sapphire |
D. | synthetic sapphire |
Answer» B. steel alloy | |
Explanation: nozzle in abrasive jet machining is made up of sapphire or wc. |
64. |
What is the life of Tungsten carbide material nozzle? |
A. | 1 – 8 hrs |
B. | 2 – 5 hrs |
C. | 10 – 15 hrs |
D. | 25 – 40 hrs |
Answer» C. 10 – 15 hrs | |
Explanation: nozzle made up of wc material has a life period which range between 10 – 15 hrs. |
65. |
In AJM, what is the life of synthetic sapphire material nozzle? |
A. | 100 hrs |
B. | 300 hrs |
C. | 500 hrs |
D. | 700 hrs |
Answer» B. 300 hrs | |
Explanation: nozzle made up of synthetic sapphire material has a life period which is about 300 hrs. |
66. |
05 mm. |
A. | 0.01 – 0.10 µm |
B. | 0.15 – 1.5 µm |
C. | 2.0 – 5.0 µm |
D. | 7.0 – 10.0 µm |
Answer» B. 0.15 – 1.5 µm | |
Explanation: surface roughness value in ajm varies between 0.15 – 1.5 µm, depending on grain size. |
67. |
Which of the following, are the processes and applications in which Abrasive jet machining can be applied? |
A. | drilling |
B. | cutting |
C. | deburring |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: abrasive jet machining can be used for cutting, drilling, deburring and cleaning processes. |
68. |
Using abrasive jet machining, wire cleaning and insulation stripping take place without affecting the conductor. |
A. | true |
B. | false |
Answer» A. true | |
Explanation: without affecting the conductor, both stripping and cleaning are done, by using abrasive jet machining. |
69. |
In Abrasive jet machining, intricate shapes and holes are machined on which type of materials? |
A. | brittle |
B. | thin |
C. | difficult to machine |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: abrasive jet machining is used to machine, intricate shapes and holes in brittle, thin and difficult to machine materials. |
70. |
State whether the following statement is true or false, about Abrasive jet machining. “Using Abrasive jet machining, micro deburring of hypodermic needles can take place.” |
A. | true |
B. | false |
Answer» A. true | |
Explanation: abrasive jet machining can be used for micro deburring of hypodermic needles. |
71. |
What are the type of materials that can be machined using Abrasive jet machining? |
A. | glass |
B. | sapphire |
C. | quartz |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: in abrasive jet machining, the above mentioned materials can be machined, which are heat sensitive and brittle. |
72. |
What is the amount of material utilizes when we machine parts using Abrasive jet machining? |
A. | very low |
B. | low |
C. | medium |
D. | high |
Answer» D. high | |
Explanation: in abrasive jet machining, material utilization is very high since it removes material by using abrasives. |
73. |
After how much time tool has to be changed in AJM? |
A. | 1 hr |
B. | 2 hrs |
C. | 5 hrs |
D. | no tool change required |
Answer» D. no tool change required | |
Explanation: in abrasive jet machining, tool changes are not required. |
74. |
By using Abrasive jet machining, how much amount of hardening does the materials experience? |
A. | no hardening |
B. | very less hardening |
C. | average hardening |
D. | high hardening |
Answer» A. no hardening | |
Explanation: in abrasive jet machining, hardening is not experienced by the machined materials. |
75. |
Which type of materials cannot be machined using Abrasive jet machining? |
A. | soft materials |
B. | hard materials |
C. | difficult to machine materials |
D. | none of the mentioned |
Answer» A. soft materials | |
Explanation: soft materials such as candy bars, thin softwood etc.., cannot be machined using ajm. |
76. |
Which of the following materials in Abrasive jet machining can be a health hazard? |
A. | abrasive grains |
B. | air carrier |
C. | silica dust |
D. | none of the mentioned |
Answer» C. silica dust | |
Explanation: silica dust, that occurs after machining can be a health hazard in ajm. |
77. |
In AJM, air filters are used to remove which of the following? |
A. | moisture |
B. | oil |
C. | other dust particles |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: before machining, air has to be filtered to remove dust, moisture and oil in the machining system. |
78. |
In advanced machining processes, what is the full form of AWJM? |
A. | automated water jet machining |
B. | automated water jet manufacturing |
C. | abrasive water jet machining |
D. | abrasive water jet manufacturing |
Answer» C. abrasive water jet machining | |
Explanation: full form of awjm is abrasive water jet machining. |
79. |
What are all the types of materials, which can be machined using AWJM? |
A. | glass |
B. | ceramics |
C. | concrete |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: hard to cut materials, which are mentioned above, can be machined using abrasive water jet machining. |
80. |
When compared to the conventional machining, how much times faster, is the Abrasive water jet machining? |
A. | 5 times |
B. | 10 times |
C. | 15 times |
D. | 20 times |
Answer» B. 10 times | |
Explanation: abrasive water jet machining is 10 times faster than the conventional machining. |
81. |
What is the percentage of the abrasives and water in the mixture? |
A. | 20% water and 80% abrasives |
B. | 80% water and 20% abrasives |
C. | 30% water and 70% abrasives |
D. | 70% water and 30% abrasives |
Answer» D. 70% water and 30% abrasives | |
Explanation: abrasive mixture consists of 70 percent water and 30 percent abrasives. |
82. |
What are the materials used for abrasives in Abrasive water jet machining? |
A. | sic |
B. | corundum |
C. | glass beads |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: all of the materials mentioned above can be used for making abrasives in abrasive water jet machining. |
83. |
In the machining system of AWJM, which one accelerates the abrasives to remove material? |
A. | water only |
B. | water jet stream |
C. | feeder |
D. | none of the mentioned |
Answer» B. water jet stream | |
Explanation: water jet stream accelerates abrasives but not the water only, to remove material. |
84. |
The introduction of compressed air to the water jet enhances the deburring action. |
A. | true |
B. | false |
Answer» A. true | |
Explanation: compressed air increases the pressure energy of the jet stream, which enhances the material removal rate. |
85. |
What is the grain size of abrasive particles, which are often used for Abrasive water jet machining? |
A. | 0.01 – 0.50 µm |
B. | 10 – 150 µm |
C. | 200 – 500 µm |
D. | 500 – 1000 µm |
Answer» B. 10 – 150 µm | |
Explanation: grain size of the abrasive particles range between 10 – 150 µm in abrasive water jet machining. |
86. |
How is the material removed in Abrasive water jet machining? |
A. | vaporization |
B. | electron transfer |
C. | corrosion |
D. | erosion |
Answer» D. erosion | |
Explanation: in abrasive water jet machining, material removal takes place by the erosion of the work piece material using abrasives accelerated by jet stream. |
87. |
Which of the following is not the feed mechanism of the abrasives in AWJM? |
A. | side feed |
B. | cross feed |
C. | central feed |
D. | all of the mentioned |
Answer» B. cross feed | |
Explanation: only side feed and central feed are used in abrasive water jet machining. |
88. |
In Abrasive water jet machining, how are the abrasives fed into the water jet stream? |
A. | suspension |
B. | injection |
C. | all of the mentioned |
D. | none of the mentioned |
Answer» C. all of the mentioned | |
Explanation: abrasives are fed into the water jet stream through suspension or injection. |
89. |
What is the use of delivery system in the machining system of AWJM? |
A. | to deliver colloidal solution |
B. | to pump water |
C. | to fed abrasives |
D. | none of the mentioned |
Answer» B. to pump water | |
Explanation: in abrasive water jet machining, water delivery system is used. |
90. |
Of the following components, which one does not come under the machining system of AWJM? |
A. | water delivery system |
B. | transducer |
C. | cutting nozzles |
D. | mixing chambers |
Answer» B. transducer | |
Explanation: transducer is the component which does not come under the machining system of awjm. |
91. |
In Abrasive water jet machining, intensifier is used to deliver which type of pressure? |
A. | very low pressure |
B. | low pressure |
C. | medium pressure |
D. | high pressure |
Answer» D. high pressure | |
Explanation: in awjm, intensifier is used to deliver high pressure water using pistons with it. |
92. |
In mixing chamber of AWJM, which of the following are mixed? |
A. | abrasives and colloidal solution |
B. | abrasives and water jet |
C. | colloidal and water jet |
D. | none of the mentioned |
Answer» B. abrasives and water jet | |
Explanation: in mixing chamber, abrasives and water jet stream are mixed. |
93. |
Of the following, which one is a type of suspension in AWJM? |
A. | direct pumping |
B. | indirect pumping |
C. | bypass pumping |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: there are three different types of suspension awj formed by indirect, direct and bypass pumping. |
94. |
In machining system of AWJM, mixing chamber is immediately followed by which of the following component? |
A. | focusing tube |
B. | cutting nozzle |
C. | intensifier |
D. | water delivery |
Answer» A. focusing tube | |
Explanation: in abrasive water jet machining, mixing chamber is immediately followed by the focusing tube. |
95. |
Which of the following energies are absorbed using the catchers in Abrasive water jet machining? |
A. | pressure energy |
B. | kinetic energy of abrasives |
C. | residual energy |
D. | all of the mentioned |
Answer» C. residual energy | |
Explanation: in awjm, catchers are used to absorb the residual energy. |
96. |
Which of the following are different types of catchers used in AWJM? |
A. | water basin type |
B. | submerged steel balls type |
C. | tib2 type |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: the above mentioned types are the types of catchers used in awjm. |
97. |
Which of the following is not a process parameter of Abrasive water jet machining? |
A. | frequency of vibration |
B. | orifice diameter |
C. | pressure |
D. | stand-off distance |
Answer» A. frequency of vibration | |
Explanation: frequency of the vibrations does not belong to the parameters of abrasive water jet machining. |
98. |
Which of the following come under the process parameters of the Abrasive water jet machining? |
A. | abrasive size |
B. | machine impact angle |
C. | traverse speed |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: all the parameters mentioned above come under abrasive water jet machining |
99. |
10 – 0.30 mm. |
A. | 1000 – 1500 bar |
B. | 1500 – 2500 bar |
C. | 2500 – 4000 bar |
D. | 4000 – 10000 bar |
Answer» C. 2500 – 4000 bar | |
Explanation: in abrasive water jet machining, pressure value will range between 2500 – 4000 bar. |
100. |
Surface roughness depends on which of the following parameters in Abrasive water jet machining? |
A. | work piece material |
B. | grit size |
C. | abrasive type |
D. | all of the mentioned |
Answer» D. all of the mentioned | |
Explanation: all the parameters mentioned above, are responsible for variation in surface roughness. |
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