BLOCK : 5
Trade Fitter, Machinist, Turner Important Question with Answer
ट्रेड थ्योरी क्वेश्चन पेपर
- (D) Increases up to certain gap between the two joining surfaces beyond which it decreases Answer: D
2. In order to have interference fit, it is essential that the lower limit of the shaft should be
3. When 3-2-1 principle is used to support and locate a three dimensional work-piece during machining, the number of degrees of freedom that are restricted is
4. Which among the NC operations given below are continuous path operations?
5. In an interchangeable assembly, shafts of size 25.000 -0.0100⁺⁰∙⁰⁴⁰ mm mate with holes of size 25.000 -0.010⁺⁰∙⁰²⁰ mm. The maximum possible clearance in the assembly will be
6. During the execution of a CNC part program block
7. The mechanism of material removal in EDM process is
8. The percentage of carbon in gray cast iron is in the range of
9. Cold working of steel is defined as working
10. Quality screw threads are produced by
11. What is the type of welding defect is caused due to stresses on heating and cooling called?
12. What is the type of welding defect caused due to poor deposition of weld rod is called?
13. What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
14. What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?
15. If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?
16. Which of the following is the correct data structure for solid models?
17. For generating a Coon’s surface we require
18. Internal gear cutting operation can be performed by
19. If a particular Fe-C alloy contains less than 0.83% carbon, it is called
20. In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2 mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90⁰, the shear angle in degree is
21. As tool and work are not in contact in EDM process
12. What is the type of welding defect caused due to poor deposition of weld rod is called?
13. What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
14. What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?
15. If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?
16. Which of the following is the correct data structure for solid models?
17. For generating a Coon’s surface we require
18. Internal gear cutting operation can be performed by
19. If a particular Fe-C alloy contains less than 0.83% carbon, it is called
20. In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2 mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90⁰, the shear angle in degree is
21. As tool and work are not in contact in EDM process
22. Hardness of steel greatly improves with
23. A lead-screw with half nuts in a lathe, free to rotate in both directions has
24. Hot rolling of mild steel is carried out
25. Trepanning is performed for
26. The hardness of a grinding wheel is determined by the
27. The cutting force in punching and blanking operations mainly depends on
28. In ECM, the material removal is due to
29. Allowance in limits and fits refers to
30. Green sand mould indicates that
49. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be
50. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
27. The cutting force in punching and blanking operations mainly depends on
28. In ECM, the material removal is due to
29. Allowance in limits and fits refers to
30. Green sand mould indicates that
32. Which of the following statement is correct regarding grinding of high carbon steel?
33. In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
34. Which of the following arc welding processes does not use consumable electrodes?
35. Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
33. In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
34. Which of the following arc welding processes does not use consumable electrodes?
35. Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
36. A twist drill is a
37. A jig is defined as a device which
38. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
39. Chemical milling operation is performed
40. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of
41. Which of the following statement is wrong about ultrasonic machining?
42. The ductile materials, during machining, produce
43. Which of the following parameters govern the value of shear angle in continuous chip formation?
44. The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
45. A right hand tool on a lathe cuts most efficiently when it travels
46. Cast iron during machining produces
37. A jig is defined as a device which
38. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
39. Chemical milling operation is performed
40. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of
41. Which of the following statement is wrong about ultrasonic machining?
42. The ductile materials, during machining, produce
43. Which of the following parameters govern the value of shear angle in continuous chip formation?
44. The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
45. A right hand tool on a lathe cuts most efficiently when it travels
46. Cast iron during machining produces
49. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be
50. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
