Machine Design
The shock absorbing capacity of a bolt can be increased by

Increasing shank diameter
Tightening it properly
Grinding the shank
Making shank diameter equal to core diameter of thread

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A bolt of M 24 × 2 means that

The pitch of the thread is 24 mm and depth is 2 mm
Cross-sectional area of the threads is 24 mm²
The effective diameter of bolt is 24 mm and there are 2 threads per cm
The nominal diameter of bolt is 24 mm and pitch is 2 mm

ANSWER DOWNLOAD EXAMIANS APP