Machine Design
The shear plane in case of bolts should

Never be across the threaded portion
Be parallel to axis of bolt
Be across threaded portion of shank
Be normal to threaded portion of shank

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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 shearing resistance to the crushing resistance of the rivets
Equating tearing resistance of the plate to the shearing resistance of the rivets

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