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

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

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Machine Design
Turn buckle has

Right hand threads on bout ends
Left hand threads on one end and right hand threads on other end
No threads
Left hand threads on both ends

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