Mechanical Engineering - Manufacturing Science - Tool Geometry

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Question - 1

In an orthogonal metal cutting operation, rake angle is 10°, uncut chip thickness is 0.127 mm, chip thickness is 0.228 mm. The value of friction coefficient is

  • A 0.76
  • B 0.58
  • C 0.55
  • D 0.08

Question - 2

During orthogonal machining with an HSS tool, the rake angle is 5°, the underformed chip thickness 0.25 mm and width of cut is 4 mm. The shear strength of the material and coefficient of friction to be 0.4, the value of cutting force is

  • A 572.87 N 
  • B 672.87 N
  • C 531.57 N
  • D 536.49 N

Question - 3

In an orthogonal cutting operation, rake angle is 15°, uncut chip thickness is 0.25 mm, chip thickness 0.50 mm and friction coefficient between chip and tool is 0.5. The cutting velocity of operation is 6.35 m/s. The value of shear velocity is

  • A 6.48 m/s
  • B 6.32 m/s
  • C 6.84 m/s 
  • D 6.72 m/s

Question - 4

During turning operation of a steel rod of 150 mm diameter by HSS tool of geometry 0°, 0, 10 0, 8°, 15°, 75 0, 0 at speed 600 rpm, tangential component of cutting force = 1200 N, axial component of the cutting force = 800 N. The value of friction coefficient is

  • A 0.69
  • B 0.56
  • C 0.78
  • D 0.64

Question - 5

Find the time required to make 6 holes in 40 mm thick plate, where feed is 0.4 mm/rev, cutting speed 66 m/min and hole diameter is 20 mm.

  • A 34.28 s
  • B 30.28 s
  • C 32.28 s
  • D 33.28 s

Question - 6

In a milling process, cutting speed is 44 mm/min. The cutter having 10 teeth and diameter is 150 mm feed per teeth is 0.25 mm. The table feed is

  • A 233.33 mm/min
  • B 240 mm/min
  • C 260 mm/min
  • D 208 mm/min

Question - 7

The length of approach in given plain milling operation is

  • A 20 mm
  • B 30 mm
  • C 40 mm
  • D 25 mm

Question - 8

The length of approach in face milling operation is

  • A 1.65 mm
  • B 1.25 mm
  • C 1.71 mm
  • D 1.82 mm

Question - 9

The diameter of cutter is 50 mm and width of job is 40 mm. If operation is unsymmetrical face milling, the length of approach distance is

  • A 30 mm
  • B 25 mm
  • C 20 mm
  • D 40 mm

Question - 10

In orthogonal cutting system

  • A the chip flows over the tool face and direction of the chip flow velocity is normal to the cutting edge
  • B the maximum chip thickness occurs at the middle
  • C the cutting edge of tool is perpendicular to direction of tool travel
  • D None of the above
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