Machine Design
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that

It is more stretched than the outer side during the manufacturing process
It is subjected to a higher cyclic loading than the outer side
It has a lower curvature than the outer side
It is subjected to a higher stress than the outer side

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
For unequal width of butt straps, the thicknesses of butt straps are

0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
0.625 t for both the straps on the inside and outside
0.75 t for both the straps on the inside and outside
0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside

ANSWER DOWNLOAD EXAMIANS APP