Materials Science and Manufacturing Engineering Miscellaneous
- A 30 mm hole shaft assembly results in minimum and maximum clearances of 0.03 mm and 0.30 mm respectively. The hole has a unilateral tolerance with zero fundamental deviation. If the tolerance on the shaft is 0.08 mm, the maximum size of the hole is
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Min. clearance
= Holemin – Shaftmax = 0.03 .......(i)
Max clearance
= Holemin – Shaftmax = 0.30 ............(ii)
Shaftmax – Shaftmin = 0.08 ...............(iii)
Since, hole has unilateral tolerance,
Hmin = 30 mm
From eq. (i), we get
Shaftmax = 30 – 0.03 = 29.97 min
From eq. (iii), we get
Shaftmin = 29.89 mm
From eq. (ii), we get
Holemax = 30.19 mmCorrect Option: C
Min. clearance
= Holemin – Shaftmax = 0.03 .......(i)
Max clearance
= Holemin – Shaftmax = 0.30 ............(ii)
Shaftmax – Shaftmin = 0.08 ...............(iii)
Since, hole has unilateral tolerance,
Hmin = 30 mm
From eq. (i), we get
Shaftmax = 30 – 0.03 = 29.97 min
From eq. (iii), we get
Shaftmin = 29.89 mm
From eq. (ii), we get
Holemax = 30.19 mm
- A shaft of diameter 20−0.10+0.20 mm and a hole of diameter 20+0.20 +0.10mm when assembled would yield.
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NA
Correct Option: C
NA
- In an interference microscope, a groove produces a band distortion of 4 band spacing. If the wave length of the monochromatic light source is 0.5 microns, the groove depth is.... mm
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Groove depth = h . λ = 4 × 0.5 μm = 0.5μm 2 2 2 2 Correct Option: A
Groove depth = h . λ = 4 × 0.5 μm = 0.5μm 2 2 2 2
- The combination of slip gauges to obtain a dimension of 10.35 mm will be
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Normally, slip gauge box set does not have slip of less than 1 mm thickness. Always use minimum number of slipgauges in combination & less than 1mm thickness is not in set.
Correct Option: B
Normally, slip gauge box set does not have slip of less than 1 mm thickness. Always use minimum number of slipgauges in combination & less than 1mm thickness is not in set.
- Outside diameter of bush is turned using a mandrel. The mandrel diameter is maintained as 0.000 0.050 30.000−0.0500.000 mm and the bore diameter is 30.000−0.0000.050 mm. The maximum value in mm of the eccentricity on the bush due to the locating mandrel
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Maximum size of Bore = 30.050mm
Minimum size of Mandrel = 29.95mm
Diametral Gap = 0.1mmEccentricity = 0.1 = 0.05 mm 2 Correct Option: A
Maximum size of Bore = 30.050mm
Minimum size of Mandrel = 29.95mm
Diametral Gap = 0.1mmEccentricity = 0.1 = 0.05 mm 2