Machine Design
A bolt of M 24 × 2 means that

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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
The flank of the tooth is the

Surface of the top of the tooth
Width of the tooth measured along the pitch circle
Surface of the tooth above the pitch surface
Surface of the tooth below the pitch surface

ANSWER DOWNLOAD EXAMIANS APP