189) In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

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90 Degree

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The pitch of rivets is obtained by equating the tearing resistance of the plate to the shearing resistance of the rivets

The pitch of rivets should not be less than 2 d, where d is the diameter of rivet hole

The maximum value of the pitch of rivets for a longitudinal joint of a boiler, as per I.B.R., is given by P_max = C.t + 41.28 mm

According to I.B.R., the thickness of butt strap shall not be less than 5 mm

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