Machine Design
In a horizontal flat belt drive, it is customary to use

Bottom side of belt as slack side
None of these
Top side of belt as slack side
Idler pulley

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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 shearing resistance to the crushing resistance of the rivets
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

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