Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

Helical gearing
Worm gearing
None of these
Bevel gearing

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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 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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