Machine Design
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

45 to 60%
63 to 70%
80 to 90%
70 to 83%

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Machine Design
Tapered roller bearings can take

Both radial and axial loads and the ratio of these being less than unity
Radial load only
Axial load only
Both radial and axial loads and the ratio of these being greater than unity

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