Machine Design
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by

Equating tearing resistance of the plate to the shearing resistance of the rivets
None of these
Equating tearing resistance of the plate to the crushing resistance of the rivets
Equating shearing resistance to the crushing resistance of the rivets

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Machine Design
In hydrostatic bearings

The oil film is maintained by supplying oil under pressure
The Oil film pressure is generated only by the rotation of the journal
Grease is used for lubrication
Do not require external supply of lubricant

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