Correct Answer:
Producing a large hole without drilling
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2. In machining metal, cutting force at the cutting edge is measured by a
Answer
Correct Answer:
Dynamometer
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3. NC contouring is an example of
Answer
Correct Answer:
Continuous path positioning
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4. Drilling is an example of
Answer
Correct Answer:
Oblique cutting
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5. Gear burnishing is a process for
Answer
Correct Answer:
Surface finishing
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6. The operation of making a cone-shaped enlargement of the end of a hole is known as
Answer
Correct Answer:
Counter-sinking
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7. The operation of smoothing and squaring the surface around a hole is known as
Answer
Correct Answer:
Spot facing
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8. The snag grinding is done
Answer
Correct Answer:
To remove considerable amount of metal without regard to accuracy of the finished surface
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9. In metal machining, the work-tool contact zone is a zone where heat is generated due to
Answer
Correct Answer:
Burnishing friction
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10. A diamond locating pin is used in jigs and fixtures because
Answer
Correct Answer:
It helps in assembly with tolerance on centre distance
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11. Which of the following operation is first performed?
Answer
Correct Answer:
Drilling
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12. The velocity of tool along the tool face is known as
Answer
Correct Answer:
Chip velocity
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13. In oblique cutting system, the cutting edge of the tool
Answer
Correct Answer:
May not clear the width of the workpiece
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14. When the cutting edge of the tool is dull, then during machining
Answer
Correct Answer:
Continuous chips with built-up edge are formed
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15. Segmental chips are formed during machining
Answer
Correct Answer:
Cast iron
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16. The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called
Answer
Correct Answer:
Chisel edge angle
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17. The angle formed by the leading edge of the land with a plane having the axis of the drill, is called
Answer
Correct Answer:
Helix or rake angle
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18. The machining of titanium is difficult due to
Answer
Correct Answer:
Low tool-chip contact area
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19. Crack in grinding wheel is developed due to
Answer
Correct Answer:
High speed of wheel
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20. Flank wear depends upon the
Answer
Correct Answer:
Amount and distribution of hard constituents in the work material
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21. The size of abrasive grain required in a grinding wheel depends upon the
Answer
Correct Answer:
Hardness of material being ground
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22. The cutting speed of a drill depends upon the
Answer
Correct Answer:
All of these
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23. The specific cutting energy used for establishing the machinability of the metal depends upon its
Answer
Correct Answer:
All of these
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24. For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
Answer
Correct Answer:
30 m/min
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25. For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is
Answer
Correct Answer:
22 m/min
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26. In the relation VTn = C, the value of n for ceramic tools is
Answer
Correct Answer:
0.40 to 0.55
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27. In the relation VTn = C, the value of n for carbide tools is
Answer
Correct Answer:
0.20 to 0.25
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28. The binding material used in cemented carbide tools is
Answer
Correct Answer:
Cobalt
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29. A 15 mm drilling machine means that it can drill a hole
Answer
Correct Answer:
Of maximum diameter 15 mm
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30. The material which on machining produces chips with built up edge is
Answer
Correct Answer:
Ductile material
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31. The factor responsible for the formation of continuous chips with built up edge is
Answer
Correct Answer:
Low cutting speed and small rake angle
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32. In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is
Answer
Correct Answer:
Cutting speed
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33. In determining the various forces on the chip, Merchant assumed that the
Answer
Correct Answer:
All of the above
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34. 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
Answer
Correct Answer:
30 microns
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35. In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to
Answer
Correct Answer:
Circular interpolation in clockwise direction and incremental dimension
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36. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of
Answer
Correct Answer:
100°C
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37. High speed steel tools retain their hardness up to a temperature of
Answer
Correct Answer:
900°C
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38. Stellite preserves hardness up to a temperature of
Answer
Correct Answer:
1100°C
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39. The type of reamer used for reaming operation in a blind hole, is
Answer
Correct Answer:
Right hand spiral fluted reamer
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40. The carbide tools operating at very low cutting speeds (below 30 m/min)
Answer
Correct Answer:
Reduces tool life
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41. Which of the following activities or operations is not related to manufacturing?
Answer
Correct Answer:
None of the above
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42. In general, any system that produces useful products or services is called as
Answer
Correct Answer:
Production system
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43. Which of the following is an example of a constant mass manufacturing process?
Answer
Correct Answer:
Rolling
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44. Gas welding is a type of
Answer
Correct Answer:
Material addition process
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45. Why is the selection of the right manufacturing process important?
Answer
Correct Answer:
All of the above
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46. The decision of what parts to be manufactured and what parts to be purchased from market is taken in
Answer
Correct Answer:
Process planning
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47. Which of the following is not a method employed for analysis of manufacturing systems?
Answer
Correct Answer:
Probability models
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48. Which of the following production processes is least flexible?
Answer
Correct Answer:
Mass production
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49. Open-loop control system is
Answer
Correct Answer:
Less accurate than closed-loop control system
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50. What is the disadvantage of an automatic control system?
Answer
Correct Answer:
It has a tendency to over-correct errors
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51. The art of creating industrial relations of any kind, like relation between employers and employees, is called as
Answer
Correct Answer:
Organisation
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52. Scientific management is a systematic approach to manage the enterprise on the basis of
Answer
Correct Answer:
All of the above
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53. The objective of utilisation of available plant facilities comes under
Answer
Correct Answer:
Production planning techniques of production control
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54. Mass production means continuous production without loss of time.
Answer
Correct Answer:
True
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55. A model of casting, constructed to use for forming a mould in damp sand, is called as
Answer
Correct Answer:
Pattern
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56. Which of the following is not a requirement of a good pattern?
Answer
Correct Answer:
It should have low strength to break it and to remove casting easily
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57. The patterns which are made in two or more pieces are called as
Answer
Correct Answer:
Split patterns
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58. Permeability can be defined as the property of moulding sand
Answer
Correct Answer:
To allow gases to escape easily from the mould
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59. The ability of the moulding sand to withstand the heat of melt without showing any sign of softening is called as
Answer
Correct Answer:
Refractoriness
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60. The sand in its natural or moist state is called as
Answer
Correct Answer:
Green sand
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61. What is the highest possible percentage of clay contents in loam sand?
Answer
Correct Answer:
50
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62. Which of the following sentences is/are correct for the casting process?
Answer
Correct Answer:
The time required for the process of making casting is quite long
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63. The productivity of casting process is comparatively
Answer
Correct Answer:
Lower than the productivity of other automatic processes like rolling
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64. Which casting process has no size and shape limits?
Answer
Correct Answer:
Sand casting
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65. Mechanical working processes are performed on metals
Answer
Correct Answer:
All of the above
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66. Hot working process is the plastic deformation of metal which is carried out
Answer
Correct Answer:
At temperature above the recrystallisation temperature
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67. The plastics which soften when heat is applied with or without pressure, but requires cooling to set them to shape are called as
Answer
Correct Answer:
Thermoplastic materials
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68. In resistance electric welding, the current passed through two joining metal pieces is
Answer
Correct Answer:
2 to 8 volts, at a high amperage
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69. As compared to the arc welding, the gas welding takes
Answer
Correct Answer:
Considerably more time for the metal to heat up
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70. Good surface finish and better dimensional accuracy can be achieved in
Answer
Correct Answer:
Cold working process
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71. The process of joining two pieces of metal with a different fusible metal applied in a molten state is called as
Answer
Correct Answer:
Soldering
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72. Which of the following statements is/are true for the welding process?
Answer
Correct Answer:
Welding results in residual stresses and distortion of workpiece
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73. Thermosetting materials are
Answer
Correct Answer:
The plastics which require heat and pressure to mould them into shape
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74. Which plastic materials contain strong cross linkings in their molecular structure?
Answer
Correct Answer:
Thermosetting materials
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75. Worm working or semi-hot working process, which is the plastic deformation of metal or alloy under conditions of temperature and strain rate, is performed to eliminate drawbacks of
Answer
Correct Answer:
Both cold and hot working processes
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76. The volume of metal that enters the rolling stand
Answer
Correct Answer:
Should remain same after rolling process
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77. The metal joined is never brought to a molten stage in
Answer
Correct Answer:
Pressure welding
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78. Which of the following is an example of fusion welding?
Answer
Correct Answer:
Atomic hydrogen welding
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79. Which of the following is an example of thermoplastic material?
Answer
Correct Answer:
Electric insulation
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80. Which of the following characteristics does not affect the properties of plastics?
Answer
Correct Answer:
None of the above
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81. Assume a machining process of taper turning. In this process, a large diameter of taper is 'D' and it is uniformly decreased to the small diameter of the taper 'd' at the horizontal length of the tapered part of the workpiece is 'L'. What is the correct formula for half of taper angle (2α / 2)?
Answer
Correct Answer:
α = tan–1 ((D – d) / 2L)
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82. Calculate time taken to face a workpiece of 100 mm diameter. The cross feed is 0.2 mm/rev and spindle speed is 200 r.p.m.
Answer
Correct Answer:
1.25 min
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83. Which of the following is a soft solder?
Answer
Correct Answer:
Lead-tin alloy
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84. What is used as joining medium in brazing operation?
Answer
Correct Answer:
Copper-zinc alloy
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85. Joint strength in brazing operation is
Answer
Correct Answer:
Not as high as in gas or arc welding
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86. Which characteristic of material is used in the forging process?
Answer
Correct Answer:
Characteristics of plasticity of material
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87. How does the ability of material to withstand unpredictable loads change after forging?
Answer
Correct Answer:
The ability of material to withstand unpredictable loads increases after forging
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88. Specific gravity of the plastics is usually
Answer
Correct Answer:
Less than the specific gravity of metals
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89. The process of combining two or more distinct polymer molecules to form a new product with different characteristics is called as
Answer
Correct Answer:
Blending
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90. Power consumption in D.arc welding is
Answer
Correct Answer:
More than the power consumption in A.arc welding
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91. Which type of process the machining can be?
Answer
Correct Answer:
Cold working
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92. Which type of arc welding is suitable for joining non-ferrous metals?
Answer
Correct Answer:
D.Arc welding
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93. Which of the following options best describes the centre lathes?
Answer
Correct Answer:
Turning machines
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94. Castings are usually
Answer
Correct Answer:
Cheaper than forgings
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95. The materials such as lead and barium, which are added with polymers to minimise the effect of heat, sunlight and ozone are called as
Answer
Correct Answer:
Stabilisers
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96. Why are the plasticisers added with polymers?
Answer
Correct Answer:
To improve flexibility and to reduce the temperature and pressure required for moulding of plastics
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97. When the tool of centre lathe moves perpendicular to the axis of rotation,
Answer
Correct Answer:
It produces a flat surface
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98. The foundation of the centre lathe is called as
Answer
Correct Answer:
Bed
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99. In circular drawing process, when the depth of drawing is more than the diameter of the die, then the process is called as
Answer
Correct Answer:
Deep drawing
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100. Chances of crack propagation are more in
Answer
Correct Answer:
Cold working process
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101. The centre lathes receive their power through
Answer
Correct Answer:
Headstock
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102. What is swing over carriage?
Answer
Correct Answer:
The maximum diameter of workpiece that can be rotated over lathe saddle
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103. Which current is used in Tungsten Inert-Gas (TIG) welding?
Answer
Correct Answer:
Both A.and D.can be used as welding current
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104. The welding process by Metal Inert-Gas (MIG) welding is
Answer
Correct Answer:
Faster than the welding process by Tungsten Inert-Gas (TIG) welding
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