Materials Science and Manufacturing Engineering Miscellaneous
- The flanks of teeth of rack-type gear cutter used for cutting involute gear profiles are
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Involute
Correct Option: C
Involute
- The drawing shows a machined shaft. The purpose of providing rounded grooves at M and N is to
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NA
Correct Option: A
NA
- Which one of the following is not a synthetic abrasive material?
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Titanium Nitride.
Correct Option: C
Titanium Nitride.
Direction: Data for a plain milling operation are given below. Length of workpiece 200 mm Cutter diameter 100 mm No. of teeth 4 Cutter speed 100 rpm Feed 200 mm/min Depth of cut 2 mm Total clearance (entry and exit) 5 mm
- Machining time for one single pass (in seconds) is
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AP = 1 (D - √D² - d²) 2
= √d(D - d)
= √2(100 - 2) = 14 mmTime/cut = L = 200 + 5 + 14 × 60 fm 200
= 65.7 s ≈ 66 sCorrect Option: B
AP = 1 (D - √D² - d²) 2
= √d(D - d)
= √2(100 - 2) = 14 mmTime/cut = L = 200 + 5 + 14 × 60 fm 200
= 65.7 s ≈ 66 s
- Mean up-deformed chip thickness (in microns) is
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tavg = tmax + tmin 2 
= 0.0707 mm = 71 mmCorrect Option: C
tavg = tmax + tmin 2
= 0.0707 mm = 71 mm
