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

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

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Machine Design
The plasticity is the property of a material which enables it to

Regain its original shape after deformation when the external forces are removed
Draw into wires by the application of a tensile force
Resist fracture due to high impact loads
Retain deformation produced under load permanently

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